Antenna Arrays for Robust GNSS in Challenging Environments Presented by Andriy Konovaltsev

Size: px
Start display at page:

Download "Antenna Arrays for Robust GNSS in Challenging Environments Presented by Andriy Konovaltsev"

Transcription

1 Chart 1 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Antenna Arrays for Robust GNSS in Challenging Environments Presented by Andriy Konovaltsev Institute of Communications and Navigation German Aerospace Center (DLR) International Technical Symposium on Navigation and Timing 17-Nov-2014, ENAC, Toulouse, France

2 Chart 2 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Radio Frequency Interference in GNSS Weak GNSS signals compete with high power ground emissions and accumulated interference sources. Fake GNSS Signal Weak GNSS Signal Accumulated Noise (UWB etc.) GNSS Receivers High Power Pulsed (DME,TACAN etc.) Jamming (e.g. PPD) High Power Continuous Wave (Harmonics from TV stations etc.)

3 Chart 3 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Countermeasures against Interference Antenna Array Hardware Array Signal Processing Appropriate antenna reception pattern Out-of-band filtering High compression point of LNA High dynamic range Multi-bit ADC, Interferer detection Adaptive ADC levels Short relaxation time of AGC Digital pulse blanking Adaptive notch filter Despread processing gain Robust design of tracking loops Deeply coupling with INS Coupling with INS Sensor fusion

4 Chart 4 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Added Value of Antenna Array Processing Signal of Interest Radio Frequency Interference Mitigation Unwanted signal? Directions of arrival Spoofing Detection N Multipath Mitigation W E S Attitude Determination Improved Availability Better Accuracy

5 Chart 5 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Outline Algorithms used with antenna arrays Pre- and post-correlation processing Practical realization of a GNSS receiver with an antenna array Antenna and RF frontend Digital signal processing Exemplary test results Summary

6 Chart 6 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Pre-Correlation Techniques (1) GNSS signals buried into noise Radio frequency interference is well observable, which can be helpful e.g. for estimation of jammer direction of arrival (DOA) Often used in such architecture: 1 2 Front-end A/D Front-end A/D 3 L Front-end A/D w 1 w 2 w 3 Σ y(t) Correlation & Tracking Desired reception pattern: Spatial zero to mitigate jammer Front-end A/D w L w x(t) Array Weights Control

7 Chart 7 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Pre-Correlation Techniques (2) Power minimisation algorithm for jammer mitigation: w ooo = arg min w E y t 2 = arg min w wh R xx w subject to w 1 = 1 Space-time adaptive processing: 1 Front-end A/D Z -1 Z -1 Z -1 Z -1 w 1,center tap = 1 w 11 w 12 w 13 w 1(K-1) w 1K 2 Front-end A/D Z -1 Z -1 Z -1 Z -1 3 Front-end A/D w 21 w 22 w 23 Z -1 Z -1 w 3(K-1) w 2K Z -1 Z -1 Σ Correlation & Tracking w 31 w 32 w 33 w 3(K-1) w 3K L Front-end A/D Z -1 Z -1 Z -1 Z -1 w 41 w 42 w 43 w 4(K-1) w 4K

8 Chart 8 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Pre-Correlation Techniques (2) Power minimisation algorithm for jammer mitigation: w ooo = arg min w E y t 2 = arg min w wh R xx w subject to w 1 = 1 Space-time adaptive processing: 1 Front-end A/D Z -1 Z -1 Z -1 Z -1 w 1,center tap = 1 w 11 w 12 w 13 w 1(K-1) w 1K 2 Front-end A/D Z -1 Z -1 Z -1 Z -1 3 Front-end A/D w 21 w 22 w 23 Z -1 Z -1 w 3(K-1) w 2K Z -1 Z -1 Σ Correlation & Tracking w 31 w 32 w 33 w 3(K-1) w 3K L Front-end A/D Z -1 Z -1 Z -1 Z -1 w 41 w 42 w 43 w 4(K-1) w 4K

9 Chart 9 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Post-Correlation Techniques (1) Due despread processing gain, GNSS signals have positive SNR Beamforming goal is to optimize Signal-to-Noise-plus-Interference Ratio (SNIR) Parameter, e.g. DOA, estimation of GNSS signals and multipath echoes, spoofing detection. 1 2 Front-end A/D Correlation w 1 Beamforming Tracking 1 3 L Front-end Front-end A/D A/D Correlation w 2 Beamforming Tracking 2 Front-end A/D Correlation w N Beamforming Tracking N

10 Chart 10 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Post-Correlation Techniques (2) Minimum Mean Squared Error (MMSE) or reference signal beamforming: w ooo = arg min w E r t y t 2 = arg min w E r t wh x 2 Eigenbeamforming [1]: reference signal, e.g. data modulation w ooo = u d where u d is eigenvector corresponding to the highest eigenvalue of post correlation signal covariance matrix R xx Typical array beam pattern with post-correlation beamforming: [1] M. Sgammini et al, Blind Adaptive Beamformer Based on Orthogonal Projections for GNSS, ION GNSS, Sept. 2012, Nashville, TN, USA

11 Chart 11 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Practical Realization: Antenna Arrays Developed by DLR Galileo E1/E6 standard and miniaturized Galileo E1/E5 standard and miniaturized GPS miniaturized GPS conformal

12 Chart 12 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Practical Realization: Complete System active antenna front end FPGA embed. PC directional coupler RF filter LNA RF filter RFamp I Mixer LP filter IFamp I IFamp I BP filter VGA A/D- Wandler 14 Bit Virtex-4 cpci LO cpci Calibration Signal Array high-rate processing (DDC, correlation) cpci Chassis low-rate processing (tracking loops, array processing, PVT)

13 Chart 13 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Practical Realization: Signal Processing (1) Hardware used since 2007: 8 ADC channels with 14 MSPS Virtex-4 SX55 Embedded Intel Dual Core 2 GHz CPU cpci Bus (Transferrate: 20 MByte/s DMA) Windows XP operation system Up to 14 satellite channel with 4- element array, MMSE beamforming and DOA estimation using 2-D ESPRIT algorithm

14 Chart 14 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Practical Realization: Signal Processing (2) Hardware used now: 16 ADC channels with MHz Xilinx Virtex 6 SX475T Intel I7 Quad-Core Host CPU PCIe Interface with up to 700 Mbyte/s Linux operation system About 50 satellite channels with 4-element array 9 channel E1/L1 front-end

15 Chart 15 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Testing Array System: Lab Simulations Use of theoretical array model Controlled environment Large variety of possible scenarios 4 x phase-aligned GNSS simulators GALANT Receiver

16 Chart 16 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Field Test Results from Galileo Test Environment (GATE) Gate TMS GPS constellation Gate TMS RFI Gate TMS Receiver under Test - 8 Galileo Pseudolites, Virtual Satellite Mode, - Static and dynamic interference scenarios - Repeater and spoofing tests

17 Chart 17 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Measurement Set-Up -Interference -Adaptive Antenna -GATE Tx -Kehlsteinhaus

18 Chart 18 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Example of Array Beam Pattern (1) No RFI RFI RFI DOA of SV MMSE beamforming is used DOA of Jammer

19 Chart 19 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Example of Array Beam Pattern (2) No RFI RFI RFI RFI 21 DOA of SV MMSE beamforming is used DOA of Jammer

20 Chart 20 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Repeater Set-Up to Test Spoofing Detection Repeater Tx antenna Repeater Rx antenna Repeater Tx GALANT antenna Antenna LNA

21 Chart 21 > Antenna Arrays for Robust GNSS > A. Konovaltsev > DOA Estimation for Repeater Signals Static scenario Dynamic scenario

22 Chart 22 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Availability of PVT, Effect of Signal Blockage and Multipath (1) Positioning using single element

23 Chart 23 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Availability of PVT, Effect of Signal Blockage and Multipath (2) Positioning using the entire array

24 Chart 24 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Combining Beamforming and Vector Tracking Fusion of vector tracking and digital beamforming Ideally suited for aiding satellites with blocked LOS or small spatial separation to RFI sources (no re-acquisition in interfered scenarios!) Significantly improved performance in terms of interference robustness and positioning availability Correlator Correlator Correlator Correlator Digital Beamforming Code Discr. Freq. Discr. Code Gen. Code NCO VDFLL Kalman Filter PVT Carr. Gen. Carr. NCO Sat 1 Sat N GALANT Presentation > A.Konovaltsev > 9 March 2012

25 Chart 25 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Test Results in PPD-Jammer Scenario Reference Receiver 1 Reference Receiver 2 DLR Multi Antenna Rx RFI M. Cuntz, A. Konovaltsev, C. Hättich, G. Kappen, and M. Meurer, Vector Tracking with a Multi Antenna GNSS Receiver, ION GNSS 2012, Sept. 2012, Nashville, TN, USA.

26 Chart 26 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Test Results in Urban Environment Array Antenna COTS Antenna - Multi Antenna Vector Tracking - Single Antenna LS PVT

27 Chart 27 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Benefit of Beamforming in Rural Scenario (1) Single antenna Beamforming* * Eigenbeamforming algorithm

28 Chart 28 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Benefit of Beamforming in Rural Scenario (2) Az: 314 El: 75 Az: 311 El: 7 Standard deviation of code-minus-carrier observables: PRN Elevation, σ_psr, Single Antenna, m σ_psr, Multi Antenna, m

29 Chart 29 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Summary Antenna arrays can be very helpful in challenging environments such as radio frequency interference, multipath, signal obstructions etc. Solutions for practical realization are already available today. From application point of view, introduction of this technology is a tradeoff between expected benefits and increased complexity/costs. Trends in the field of GNSS antenna arrays: Array miniaturization Use of COTS antenna elements for building low-cost arrays Sophisticated calibration methods to keep induced code and carrier range biases very low

30 Chart 30 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Back-up Slides

31 Chart 31 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Practical Realization: Further Examples of Antennas Arrays 7-Element Array by SATIMO (France) Frederic Leveau et al, Anti-Jam Protection by Antenna: Conception, Realization, Evaluation of a Seven-Element GNSS CRPA, GPS World, Feb Element Array built with COTS Elements Yu-Hsuan Chen et al., Off-the-Shelf Antennas for Controlled-Reception-Pattern Antenna Arrays, GPS World, Feb. 2013

32 Chart 32 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Practical Realization: RF Front End Single PLL-Synthesizer per band Up to 9 channels Common 10 MHz reference OCXO Crosstalk Isolation > 50 db 30 MHz Bandwidth 9 ch E1 front end 4 channel E1 front end PCB Crosstalk simulations

33 Chart 33 > Antenna Arrays for Robust GNSS > A. Konovaltsev > Characteristics of PPD-Jammer - Approximately 9 dbm output power - 13 MHz bandwidth - Sweep time 40 us - Center frequency GHz Power/frequency (db/hz) Power/frequency (db/hz) Frequency (GHz) Periodogram Power Spectral Density Estimate Frequency (GHz)

Navigation für herausfordernde Anwendungen Robuste Satellitennavigation für sicherheitskritische Anwendungen

Navigation für herausfordernde Anwendungen Robuste Satellitennavigation für sicherheitskritische Anwendungen www.dlr.de Chart 1 Navigation für herausfordernde Anwendungen Robuste Satellitennavigation für sicherheitskritische Anwendungen PD Dr.-Ing. habil. Michael Meurer German Aerospace Centre (DLR), Oberpfaffenhofen

More information

Current Challenges (and Solutions) in Satellite Navigation. Omar García Crespillo Institute of Communication and Navigation

Current Challenges (and Solutions) in Satellite Navigation. Omar García Crespillo Institute of Communication and Navigation Current Challenges (and Solutions) in Satellite Navigation Omar García Crespillo Institute of Communication and Navigation Satellite Navigation Application Fields Navigation: automotive, aircrafts, shipping,

More information

Real-Time Software Receiver Using Massively Parallel

Real-Time Software Receiver Using Massively Parallel Real-Time Software Receiver Using Massively Parallel Processors for GPS Adaptive Antenna Array Processing Jiwon Seo, David De Lorenzo, Sherman Lo, Per Enge, Stanford University Yu-Hsuan Chen, National

More information

The Case for Recording IF Data for GNSS Signal Forensic Analysis Using a SDR

The Case for Recording IF Data for GNSS Signal Forensic Analysis Using a SDR The Case for Recording IF Data for GNSS Signal Forensic Analysis Using a SDR Professor Gérard Lachapelle & Dr. Ali Broumandan PLAN Group, University of Calgary PLAN.geomatics.ucalgary.ca IGAW 2016-GNSS

More information

Adaptive Array Technology for Navigation in Challenging Signal Environments

Adaptive Array Technology for Navigation in Challenging Signal Environments Adaptive Array Technology for Navigation in Challenging Signal Environments November 15, 2016 Point of Contact: Dr. Gary A. McGraw Technical Fellow Communications & Navigation Systems Advanced Technology

More information

Assessing & Mitigation of risks on railways operational scenarios

Assessing & Mitigation of risks on railways operational scenarios R H I N O S Railway High Integrity Navigation Overlay System Assessing & Mitigation of risks on railways operational scenarios Rome, June 22 nd 2017 Anja Grosch, Ilaria Martini, Omar Garcia Crespillo (DLR)

More information

Performance Analysis of Joint Multi-Antenna Spoofing Detection and Attitude Estimation

Performance Analysis of Joint Multi-Antenna Spoofing Detection and Attitude Estimation Performance Analysis of Joint Multi-Antenna Spoofing Detection and Attitude Estimation Andriy Konovaltsev, Manuel Cuntz, Christian Haettich, Michael Meurer Institute of Communications and Navigation, German

More information

Mitigation of Continuous and Pulsed Radio Interference with GNSS Antenna Arrays

Mitigation of Continuous and Pulsed Radio Interference with GNSS Antenna Arrays Mitigation of Continuous and Pulsed Radio Interference with GNSS Antenna Arrays Andriy Konovaltsev 1, David S. De Lorenzo 2, Achim Hornbostel 1, Per Enge 2 1 German Aerospace Center (DLR), Oberpfaffenhofen,

More information

GAJET, a DRDC Evaluation Testbed for Navigation Electronic Warfare. Michel Clénet

GAJET, a DRDC Evaluation Testbed for Navigation Electronic Warfare. Michel Clénet GAJET, a DRDC Evaluation Testbed for Navigation Electronic Warfare Michel Clénet Outline Introduction CRPA project at DRDC Ottawa GAJET: An Evaluation Test bed for GPS Anti-Jam System An AJ simulation

More information

TEST RESULTS OF A HIGH GAIN ADVANCED GPS RECEIVER

TEST RESULTS OF A HIGH GAIN ADVANCED GPS RECEIVER TEST RESULTS OF A HIGH GAIN ADVANCED GPS RECEIVER ABSTRACT Dr. Alison Brown, Randy Silva, Gengsheng Zhang,; NAVSYS Corporation. NAVSYS High Gain Advanced GPS Receiver () uses a digital beam-steering antenna

More information

High Gain Advanced GPS Receiver

High Gain Advanced GPS Receiver High Gain Advanced GPS Receiver NAVSYS Corporation 14960 Woodcarver Road, Colorado Springs, CO 80921 Introduction The NAVSYS High Gain Advanced GPS Receiver (HAGR) is a digital beam steering receiver designed

More information

SX-NSR 2.0 A Multi-frequency and Multi-sensor Software Receiver with a Quad-band RF Front End

SX-NSR 2.0 A Multi-frequency and Multi-sensor Software Receiver with a Quad-band RF Front End SX-NSR 2.0 A Multi-frequency and Multi-sensor Software Receiver with a Quad-band RF Front End - with its use for Reflectometry - N. Falk, T. Hartmann, H. Kern, B. Riedl, T. Pany, R. Wolf, J.Winkel, IFEN

More information

Adaptive Antenna Array Processing for GPS Receivers

Adaptive Antenna Array Processing for GPS Receivers Adaptive Antenna Array Processing for GPS Receivers By Yaohua Zheng Thesis submitted for the degree of Master of Engineering Science School of Electrical & Electronic Engineering Faculty of Engineering,

More information

HIGH GAIN ADVANCED GPS RECEIVER

HIGH GAIN ADVANCED GPS RECEIVER ABSTRACT HIGH GAIN ADVANCED GPS RECEIVER NAVSYS High Gain Advanced () uses a digital beam-steering antenna array to enable up to eight GPS satellites to be tracked, each with up to dbi of additional antenna

More information

A Digitally Configurable Receiver for Multi-Constellation GNSS

A Digitally Configurable Receiver for Multi-Constellation GNSS Innovative Navigation using new GNSS SIGnals with Hybridised Technologies A Digitally Configurable Receiver for Multi-Constellation GNSS Westminster Contributors Prof. Izzet Kale Dr. Yacine Adane Dr. Alper

More information

Design and Experiment of Adaptive Anti-saturation and Anti-jamming Modules for GPS Receiver Based on 4-antenna Array

Design and Experiment of Adaptive Anti-saturation and Anti-jamming Modules for GPS Receiver Based on 4-antenna Array Advances in Computer Science Research (ACRS), volume 54 International Conference on Computer Networks and Communication Technology (CNCT2016) Design and Experiment of Adaptive Anti-saturation and Anti-jamming

More information

Autonomous Spoofing Detection and Mitigation with a Miniaturized Adaptive Antenna Array

Autonomous Spoofing Detection and Mitigation with a Miniaturized Adaptive Antenna Array Autonomous Spoofing Detection and Mitigation with a Miniaturized Adaptive Antenna Array Andriy Konovaltsev 1, Stefano Caizzone 1, Manuel Cuntz 1, Michael Meurer 1,2 1 Institute of Communications and Navigation,

More information

Mutual Coupling Estimation for GPS Antenna Arrays in the Presence of Multipath

Mutual Coupling Estimation for GPS Antenna Arrays in the Presence of Multipath Mutual Coupling Estimation for GPS Antenna Arrays in the Presence of Multipath Zili Xu, Matthew Trinkle School of Electrical and Electronic Engineering University of Adelaide PACal 2012 Adelaide 27/09/2012

More information

Interference Detection and Localisation within GEMS II. Ediz Cetin, Ryan J. R. Thompson and Andrew G. Dempster

Interference Detection and Localisation within GEMS II. Ediz Cetin, Ryan J. R. Thompson and Andrew G. Dempster Interference Detection and Localisation within GEMS II Ediz Cetin, Ryan J. R. Thompson and Andrew G. Dempster GNSS Environmental Monitoring System (GEMS) ARC Linkage Project between: GEMS I : Comprehensively

More information

RF and Microwave Test and Design Roadshow 5 Locations across Australia and New Zealand

RF and Microwave Test and Design Roadshow 5 Locations across Australia and New Zealand RF and Microwave Test and Design Roadshow 5 Locations across Australia and New Zealand Advanced PXI Technologies Signal Recording, FPGA s, and Synchronization Outline Introduction to the PXI Architecture

More information

A Bavarian Initiative towards a Robust Galileo PRS Receiver

A Bavarian Initiative towards a Robust Galileo PRS Receiver A Bavarian Initiative towards a Robust Galileo PRS Receiver Alexander Ruegamer, Ion Suberviola, Frank Foerster, Guenter Rohmer, Fraunhofer IIS Andriy Konovaltsev, Nikola Basta, Michael Meurer, German Aerospace

More information

Resilient Alternative PNT Capabilities for Aviation to Support Continued Performance Based Navigation

Resilient Alternative PNT Capabilities for Aviation to Support Continued Performance Based Navigation Resilient Alternative PNT Capabilities for Aviation to Support Continued Performance Based Navigation Presented by Sherman Lo International Technical Symposium on Navigation & Timing ENAC, Toulouse, France

More information

GNSS RFI/Spoofing: Detection, Localization, & Mitigation

GNSS RFI/Spoofing: Detection, Localization, & Mitigation GNSS RFI/Spoofing: Detection, Localization, & Mitigation Stanford's 2012 PNT Challenges and Opportunities Symposium 14 - November - 2012 Dennis M. Akos University of Colorado/Stanford University with contributions

More information

Interference Detection and Characterization with an Array based GNSS Receiver using Conformal Antennas in Maritime Environments

Interference Detection and Characterization with an Array based GNSS Receiver using Conformal Antennas in Maritime Environments Interference Detection and Characterization with an Array based GNSS Receiver using Conformal Antennas in Maritime Environments A. Konovaltsev 1, S. Caizzone 1, K. Yinusa 1, M. Sgammini 1, E. Pérez Marcos

More information

Null-steering GPS dual-polarised antenna arrays

Null-steering GPS dual-polarised antenna arrays Presented at SatNav 2003 The 6 th International Symposium on Satellite Navigation Technology Including Mobile Positioning & Location Services Melbourne, Australia 22 25 July 2003 Null-steering GPS dual-polarised

More information

Multi-Receiver Vector Tracking

Multi-Receiver Vector Tracking Multi-Receiver Vector Tracking Yuting Ng and Grace Xingxin Gao please feel free to view the.pptx version for the speaker notes Cutting-Edge Applications UAV formation flight remote sensing interference

More information

Measuring Galileo s Channel the Pedestrian Satellite Channel

Measuring Galileo s Channel the Pedestrian Satellite Channel Satellite Navigation Systems: Policy, Commercial and Technical Interaction 1 Measuring Galileo s Channel the Pedestrian Satellite Channel A. Lehner, A. Steingass, German Aerospace Center, Münchnerstrasse

More information

Case Study: and Test Wireless Receivers

Case Study: and Test Wireless Receivers Case Study: Using New Technologies to Design and Test Wireless Receivers Agenda Architecture of a receiver Basic GPS Receiver Measurements Case Study 1: GPS Simulation How Testing Works Simulation vs.

More information

UHF Phased Array Ground Stations for Cubesat Applications

UHF Phased Array Ground Stations for Cubesat Applications UHF Phased Array Ground Stations for Cubesat Applications Colin Sheldon, Justin Bradfield, Erika Sanchez, Jeffrey Boye, David Copeland and Norman Adams 10 August 2016 Colin Sheldon, PhD 240-228-8519 Colin.Sheldon@jhuapl.edu

More information

Design and Test of FPGA-based Direction-of-Arrival Algorithms for Adaptive Array Antennas

Design and Test of FPGA-based Direction-of-Arrival Algorithms for Adaptive Array Antennas 2011 IEEE Aerospace Conference Big Sky, MT, March 7, 2011 Session# 3.01 Phased Array Antennas Systems and Beam Forming Technologies Pres #: 3.0102, Paper ID: 1198 Rm: Elbow 3, Time: 8:55am Design and Test

More information

BaSE-II: A Robust and Experimental Galileo PRS Receiver Development Platform

BaSE-II: A Robust and Experimental Galileo PRS Receiver Development Platform BaSE-II: A Robust and Experimental Galileo PRS Receiver Development Platform Alexander Rügamer, Philipp Neumaier, Philipp Sommer, Fabio Garzia, Günter Rohmer, Fraunhofer IIS, Germany Andriy Konovaltsev,

More information

TEST RESULTS OF A DIGITAL BEAMFORMING GPS RECEIVER FOR MOBILE APPLICATIONS

TEST RESULTS OF A DIGITAL BEAMFORMING GPS RECEIVER FOR MOBILE APPLICATIONS TEST RESULTS OF A DIGITAL BEAMFORMING GPS RECEIVER FOR MOBILE APPLICATIONS Alison Brown, Huan-Wan Tseng, and Randy Kurtz, NAVSYS Corporation BIOGRAPHY Alison Brown is the President and CEO of NAVSYS Corp.

More information

Improved GPS Carrier Phase Tracking in Difficult Environments Using Vector Tracking Approach

Improved GPS Carrier Phase Tracking in Difficult Environments Using Vector Tracking Approach Improved GPS Carrier Phase Tracking in Difficult Environments Using Vector Tracking Approach Scott M. Martin David M. Bevly Auburn University GPS and Vehicle Dynamics Laboratory Presentation Overview Introduction

More information

Bring satellites into your lab: GNSS simulators from the T&M expert.

Bring satellites into your lab: GNSS simulators from the T&M expert. Bring satellites into your lab: GNSS simulators from the T&M expert. www.rohde-schwarz.com/gnss-solutions Your challenge GNSS receiver tests can only be conclusive when they are performed under realistic

More information

GPS Beamforming with Low-cost RTL-SDRs Wil Myrick, Ph.D.

GPS Beamforming with Low-cost RTL-SDRs Wil Myrick, Ph.D. with Low-cost RTL-SDRs Wil Myrick, Ph.D. September 13, 2017 Conference 2017 Recap from GRCon 2016 MWF Invented by Dr. Scott Goldstein and Dr. Irving Reed (1996) Initial Release (2001) Revisited GPS Work

More information

Bluetooth Angle Estimation for Real-Time Locationing

Bluetooth Angle Estimation for Real-Time Locationing Whitepaper Bluetooth Angle Estimation for Real-Time Locationing By Sauli Lehtimäki Senior Software Engineer, Silicon Labs silabs.com Smart. Connected. Energy-Friendly. Bluetooth Angle Estimation for Real-

More information

Calibration Concepts of Multi-Channel Spaceborne SAR

Calibration Concepts of Multi-Channel Spaceborne SAR DLR.de Chart 1 > CEOS Workshop 2016 > Tobias Rommel > September 7 th, 2016 Calibration Concepts of Multi-Channel Spaceborne SAR T. Rommel, F. Queiroz de Almeida, S. Huber, M. Jäger, G. Krieger, C. Laux,

More information

Bring satellites into your lab

Bring satellites into your lab Bring satellites into your lab GNSS simulators from the T&M expert 5215.5042.32 02.01 PDP 1 en www.rohde-schwarz.com/gnss-solutions GNSS-Simulators--------Bring-satellites_fly_5215-5042-32_v0201.indd 7

More information

Scalable Front-End Digital Signal Processing for a Phased Array Radar Demonstrator. International Radar Symposium 2012 Warsaw, 24 May 2012

Scalable Front-End Digital Signal Processing for a Phased Array Radar Demonstrator. International Radar Symposium 2012 Warsaw, 24 May 2012 Scalable Front-End Digital Signal Processing for a Phased Array Radar Demonstrator F. Winterstein, G. Sessler, M. Montagna, M. Mendijur, G. Dauron, PM. Besso International Radar Symposium 2012 Warsaw,

More information

GNSS Receiver Testing by Use of a Hardware Signal Simulator with Emphasis on Pulsed and CW Interference

GNSS Receiver Testing by Use of a Hardware Signal Simulator with Emphasis on Pulsed and CW Interference GNSS Receiver Testing by Use of a Hardware Signal Simulator with Emphasis on Pulsed and CW Interference Holmer Denks, Achim Hornbostel, German Aerospace Center (DLR) Vincent Chopard, Thales Avionics ABSTRACT

More information

It is well known that GNSS signals

It is well known that GNSS signals GNSS Solutions: Multipath vs. NLOS signals GNSS Solutions is a regular column featuring questions and answers about technical aspects of GNSS. Readers are invited to send their questions to the columnist,

More information

Test Results of a 7-Element Small Controlled Reception Pattern Antenna

Test Results of a 7-Element Small Controlled Reception Pattern Antenna Test Results of a 7-Element Small Controlled Reception Pattern Antenna Alison Brown and David Morley, NAVSYS Corporation BIOGRAPHY Alison Brown is the President and CEO of NAVSYS Corporation. She has a

More information

DOI: /

DOI: / 621.396 DOI: 10.26467/2079-0619-2017-20-5-43-49,.. 1 1,., - ( ), I, - II III,.,., ( ),,,, -.,, -,. -,.. :,,, -,. [1, 2]. - : - ( ), -, -., - ( ) -, - -,,,., -,., [1, 8], [5, 7]. 43 20, 05, 2017., [9, 10]

More information

Integrated GPS/TOA Navigation using a Positioning and Communication Software Defined Radio

Integrated GPS/TOA Navigation using a Positioning and Communication Software Defined Radio Integrated GPS/TOA Navigation using a Positioning and Communication Software Defined Radio Alison Brown and Janet Nordlie NAVSYS Corporation 96 Woodcarver Road Colorado Springs, CO 89 Abstract-While GPS

More information

BeiDou Next Generation Signal Design and Expected Performance

BeiDou Next Generation Signal Design and Expected Performance International Technical Symposium on Navigation and Timing ENAC, 17 Nov 2015 BeiDou Next Generation Signal Design and Expected Performance Challenges and Proposed Solutions Zheng Yao Tsinghua University

More information

GPS receivers built for various

GPS receivers built for various GNSS Solutions: Measuring GNSS Signal Strength angelo joseph GNSS Solutions is a regular column featuring questions and answers about technical aspects of GNSS. Readers are invited to send their questions

More information

Benefits of a Reconfigurable Software GNSS Receiver in Multipath Environment

Benefits of a Reconfigurable Software GNSS Receiver in Multipath Environment Journal of Global Positioning Systems (4) Vol. 3, No. 1-: 49-56 Benefits of a Reconfigurable Software GNSS Receiver in Multipath Environment Fabio Dovis, Marco Pini, Massimiliano Spelat Politecnico di

More information

The Influence of Multipath on the Positioning Error

The Influence of Multipath on the Positioning Error The Influence of Multipath on the Positioning Error Andreas Lehner German Aerospace Center Münchnerstraße 20 D-82230 Weßling, Germany andreas.lehner@dlr.de Co-Authors: Alexander Steingaß, German Aerospace

More information

Spectral Monitoring/ SigInt

Spectral Monitoring/ SigInt RF Test & Measurement Spectral Monitoring/ SigInt Radio Prototyping Horizontal Technologies LabVIEW RIO for RF (FPGA-based processing) PXI Platform (Chassis, controllers, baseband modules) RF hardware

More information

DURIP Distributed SDR testbed for Collaborative Research. Wednesday, November 19, 14

DURIP Distributed SDR testbed for Collaborative Research. Wednesday, November 19, 14 DURIP Distributed SDR testbed for Collaborative Research Distributed Software Defined Radar Testbed Collaborative research resource based on software defined radar (SDR) platforms that can adaptively modify

More information

RF and Microwave Test and Design Roadshow Cape Town & Midrand

RF and Microwave Test and Design Roadshow Cape Town & Midrand RF and Microwave Test and Design Roadshow Cape Town & Midrand Advanced PXI Technologies Signal Recording, FPGA s, and Synchronization Philip Ehlers Outline Introduction to the PXI Architecture PXI Data

More information

Simulation and Validation of a GPS Antenna Array Concept for JPALS Application

Simulation and Validation of a GPS Antenna Array Concept for JPALS Application Simulation and Validation of a GPS Antenna Array Concept for JPALS Application Ung Suok Kim, Dennis Akos, Per Enge, Stanford University Frederic Bastide, ENAC, France BIOGRAPHY Ung Suok Kim is a Ph.D.

More information

NCS TITAN. The most powerful GNSS Simulator available. NCS TITAN Datasheet. Scalability. Extendability. In co-operation with

NCS TITAN. The most powerful GNSS Simulator available. NCS TITAN Datasheet. Scalability. Extendability. In co-operation with NCS TITAN The most powerful GNSS Simulator available Scalability Fidelity Reliability Usability Extendability Flexibility Upgradability Features Signal Capabilities Support of all global (GNSS) and regional

More information

Small Controlled Reception Pattern Antenna (S-CRPA) Design and Test Results

Small Controlled Reception Pattern Antenna (S-CRPA) Design and Test Results Small Controlled Reception Pattern Antenna (S-CRPA) Design and Test Results Dr. Huan-Wan Tseng and Atterberg, NAVSYS Corporation BIOGRAPHY Dr. Huan-Wan Tseng is an Antenna & RF Engineer at NAVSYS Corporation.

More information

An ultra-low-cost antenna array frontend for GNSS application

An ultra-low-cost antenna array frontend for GNSS application International Collaboration Centre for Research and Development on Satellite Navigation Technology in South East Asia An ultra-low-cost antenna array frontend for GNSS application Thuan D. Nguyen, Vinh

More information

RF, HIL and Radar Test

RF, HIL and Radar Test RF, HIL and Radar Test Abhay Samant Marketing Manager India, Russia and Arabia RF Hardware In The Loop Complex Radio Environment Components of RF HIL Communication Modems Channel Simulation GPS Simulation

More information

Jamming and Spoofing of GNSS Signals An Underestimated Risk?!

Jamming and Spoofing of GNSS Signals An Underestimated Risk?! Jamming and Spoofing of GNSS Signals An Underestimated Risk?! Alexander Rügamer Dirk Kowalewski Fraunhofer IIS NavXperience GmbH Fraunhofer IIS 1 Source: http://securityaffairs.co/wordpress/wpcontent/uploads/2012/02/spoofing.jpg

More information

Analog and RF circuit techniques in nanometer CMOS

Analog and RF circuit techniques in nanometer CMOS Analog and RF circuit techniques in nanometer CMOS Bram Nauta University of Twente The Netherlands http://icd.ewi.utwente.nl b.nauta@utwente.nl UNIVERSITY OF TWENTE. Outline Introduction Balun-LNA-Mixer

More information

2009 Small Satellite Conference Logan, Utah

2009 Small Satellite Conference Logan, Utah Exploiting Link Dynamics in LEO-to-Ground Communications 2009 Small Satellite Conference Logan, Utah Joseph Palmer jmp@lanl.gov Michael Caffrey mpc@lanl.gov Los Alamos National Laboratory Paper Abstract

More information

Issues for Multi-Band Multi-Access Radio Circuits in 5G Mobile Communication

Issues for Multi-Band Multi-Access Radio Circuits in 5G Mobile Communication Issues or Multi-Band Multi-Access Radio Circuits in 5G Mobile Communication Yasushi Yamao AWCC The University o Electro-Communications LABORATORY Outline Background Requirements or 5G Hardware Issues or

More information

A FAMILY OF SOLUTIONS BASED ON THE srx-10, A SW DEFINED MULTICONSTELLATION GNSS RECEIVER

A FAMILY OF SOLUTIONS BASED ON THE srx-10, A SW DEFINED MULTICONSTELLATION GNSS RECEIVER ION GNSS+ 2014, Session A5 A FAMILY OF SOLUTIONS BASED ON THE srx-10, A SW DEFINED MULTICONSTELLATION GNSS RECEIVER Teresa Ferreira, Manuel Toledo, José María López, GMV Property of GMV All rights reserved

More information

Channel Modelling ETIN10. Directional channel models and Channel sounding

Channel Modelling ETIN10. Directional channel models and Channel sounding Channel Modelling ETIN10 Lecture no: 7 Directional channel models and Channel sounding Ghassan Dahman / Fredrik Tufvesson Department of Electrical and Information Technology Lund University, Sweden 2014-02-17

More information

Digitally-Controlled RF Self- Interference Canceller for Full-Duplex Radios

Digitally-Controlled RF Self- Interference Canceller for Full-Duplex Radios Digitally-Controlled RF Self- nterference Canceller for Full-Duplex Radios Joose Tamminen 1, Matias Turunen 1, Dani Korpi 1, Timo Huusari 2, Yang-Seok Choi 2, Shilpa Talwar 2, and Mikko Valkama 1 1 Dept.

More information

THE PERFORMANCE of positioning with Global Navigation

THE PERFORMANCE of positioning with Global Navigation IEEE SYSTEMS JOURNAL, VOL. 2, NO. 1, MARCH 2008 7 Simulation of Multi-Element Antenna Systems for Navigation Applications Achim Hornbostel, Andriy Konovaltsev, Holmer Denks, and Felix Antreich Abstract

More information

INTRODUCTION HARDWARE ARCHITECTURE OF RECEIVER

INTRODUCTION HARDWARE ARCHITECTURE OF RECEIVER Validation of a Controlled Reception Pattern Antenna (CRPA) Receiver Built from Inexpensive General-purpose Elements During Several Live Jamming Test Campaigns Yu-Hsuan Chen, Stanford University Sherman

More information

ADAPTIVE ANTENNAS. TYPES OF BEAMFORMING

ADAPTIVE ANTENNAS. TYPES OF BEAMFORMING ADAPTIVE ANTENNAS TYPES OF BEAMFORMING 1 1- Outlines This chapter will introduce : Essential terminologies for beamforming; BF Demonstrating the function of the complex weights and how the phase and amplitude

More information

A Modular Re-programmable Digital Receiver Architecture

A Modular Re-programmable Digital Receiver Architecture A Modular Re-programmable Digital Receiver Architecture Eric Holm, Dr. Alison Brown, Richard Slosky, NAVSYS Corporation BIOGRAPHY Eric Holm is an Integrated Product Team leader for the Range and Tracking

More information

GNSS Interference Detection and Mitigation for UAV Navigation. May 22 nd, 2014

GNSS Interference Detection and Mitigation for UAV Navigation. May 22 nd, 2014 GNSS Interference Detection and Mitigation for UAV Navigation May 22 nd, 2014 Presented in cooperation with GPS World Magazine Loctronix Corporation 2008, All Rights Reserved. Today s Topics and Panelists

More information

KINEMATIC TEST RESULTS OF A MINIATURIZED GPS ANTENNA ARRAY WITH DIGITAL BEAMSTEERING ELECTRONICS

KINEMATIC TEST RESULTS OF A MINIATURIZED GPS ANTENNA ARRAY WITH DIGITAL BEAMSTEERING ELECTRONICS KINEMATIC TEST RESULTS OF A MINIATURIZED GPS ANTENNA ARRAY WITH DIGITAL BEAMSTEERING ELECTRONICS Alison Brown, Keith Taylor, Randy Kurtz and Huan-Wan Tseng, NAVSYS Corporation BIOGRAPHY Alison Brown is

More information

CDMA Receivers for High Spectral Utilization MPRG

CDMA Receivers for High Spectral Utilization MPRG CDMA Receivers for High Spectral Utilization 19 Types of CDMA Receivers Conventional Single User Receivers Multiuser Receivers 20 Why Use Advanced Receivers? CDMA is interference limited CDMA subject to

More information

Miniaturized GPS Antenna Array Technology and Predicted Anti-Jam Performance

Miniaturized GPS Antenna Array Technology and Predicted Anti-Jam Performance Miniaturized GPS Antenna Array Technology and Predicted Anti-Jam Performance Dale Reynolds; Alison Brown NAVSYS Corporation. Al Reynolds, Boeing Military Aircraft And Missile Systems Group ABSTRACT NAVSYS

More information

An Ultra Wideband Local Positioning System for Highly Complex Indoor Environments

An Ultra Wideband Local Positioning System for Highly Complex Indoor Environments An Ultra Wideband Local Positioning System for Highly Complex Indoor Environments Benjamin Waldmann, Robert Weigel Institute for Electronics Engineering University of Erlangen Nuremberg Randolf Ebelt,

More information

2009 CubeSat Developer s Workshop San Luis Obispo, CA

2009 CubeSat Developer s Workshop San Luis Obispo, CA Exploiting Link Dynamics in LEO-to-Ground Communications 2009 CubeSat Developer s Workshop San Luis Obispo, CA Michael Caffrey mpc@lanl.gov Joseph Palmer jmp@lanl.gov Los Alamos National Laboratory Paper

More information

SVD-based RF interference detection and mitigation for GNSS

SVD-based RF interference detection and mitigation for GNSS SVD-based RF interference detection and mitigation for GNSS Matteo Sgammini, Felix Antreich and Michael Meurer, Institute of Communications and Navigation, German Aerospace Center (DLR) BIOGRAPHY Matteo

More information

ELEC RADAR FRONT-END SUMMARY

ELEC RADAR FRONT-END SUMMARY ELEC Radar Front-End is designed for FMCW (including CW) radar application. The output frequency of each RX provides range, speed, and amplitude information to DSP. It will detect target azimuth angle

More information

WELCOME TO. The Role of GNSS Antennas in Mitigating Jamming and Interference. Co Moderator: Lori Dearman, Sr. Webinar Producer

WELCOME TO. The Role of GNSS Antennas in Mitigating Jamming and Interference. Co Moderator: Lori Dearman, Sr. Webinar Producer WELCOME TO The Role of GNSS Antennas in Mitigating Jamming and Interference Audio is available via landline or VoIP For VoIP: You will be connected to audio using your computer s speakers or headset. Dr.

More information

CHAPTER 10 CONCLUSIONS AND FUTURE WORK 10.1 Conclusions

CHAPTER 10 CONCLUSIONS AND FUTURE WORK 10.1 Conclusions CHAPTER 10 CONCLUSIONS AND FUTURE WORK 10.1 Conclusions This dissertation reported results of an investigation into the performance of antenna arrays that can be mounted on handheld radios. Handheld arrays

More information

Full Duplex Radios. Sachin Katti Kumu Networks & Stanford University 4/17/2014 1

Full Duplex Radios. Sachin Katti Kumu Networks & Stanford University 4/17/2014 1 Full Duplex Radios Sachin Katti Kumu Networks & Stanford University 4/17/2014 1 It is generally not possible for radios to receive and transmit on the same frequency band because of the interference that

More information

DYNAMICALLY RECONFIGURABLE SOFTWARE DEFINED RADIO FOR GNSS APPLICATIONS

DYNAMICALLY RECONFIGURABLE SOFTWARE DEFINED RADIO FOR GNSS APPLICATIONS DYNAMICALLY RECONFIGURABLE SOFTWARE DEFINED RADIO FOR GNSS APPLICATIONS Alison K. Brown (NAVSYS Corporation, Colorado Springs, Colorado, USA, abrown@navsys.com); Nigel Thompson (NAVSYS Corporation, Colorado

More information

A GPS RECEIVER DESIGNED FOR CARRIER-PHASE TIME TRANSFER

A GPS RECEIVER DESIGNED FOR CARRIER-PHASE TIME TRANSFER A GPS RECEIVER DESIGNED FOR CARRIER-PHASE TIME TRANSFER Alison Brown, Randy Silva, NAVSYS Corporation and Ed Powers, US Naval Observatory BIOGRAPHY Alison Brown is the President and CEO of NAVSYS Corp.

More information

Satellite Navigation Principle and performance of GPS receivers

Satellite Navigation Principle and performance of GPS receivers Satellite Navigation Principle and performance of GPS receivers AE4E08 GPS Block IIF satellite Boeing North America Christian Tiberius Course 2010 2011, lecture 3 Today s topics Introduction basic idea

More information

POWERGPS : A New Family of High Precision GPS Products

POWERGPS : A New Family of High Precision GPS Products POWERGPS : A New Family of High Precision GPS Products Hiroshi Okamoto and Kazunori Miyahara, Sokkia Corp. Ron Hatch and Tenny Sharpe, NAVCOM Technology Inc. BIOGRAPHY Mr. Okamoto is the Manager of Research

More information

AIRPORT MULTIPATH SIMULATION AND MEASUREMENT TOOL FOR SITING DGPS REFERENCE STATIONS

AIRPORT MULTIPATH SIMULATION AND MEASUREMENT TOOL FOR SITING DGPS REFERENCE STATIONS AIRPORT MULTIPATH SIMULATION AND MEASUREMENT TOOL FOR SITING DGPS REFERENCE STATIONS ABSTRACT Christophe MACABIAU, Benoît ROTURIER CNS Research Laboratory of the ENAC, ENAC, 7 avenue Edouard Belin, BP

More information

A Hybrid Indoor Tracking System for First Responders

A Hybrid Indoor Tracking System for First Responders A Hybrid Indoor Tracking System for First Responders Precision Indoor Personnel Location and Tracking for Emergency Responders Technology Workshop August 4, 2009 Marc Harlacher Director, Location Solutions

More information

ISSCC 2003 / SESSION 20 / WIRELESS LOCAL AREA NETWORKING / PAPER 20.5

ISSCC 2003 / SESSION 20 / WIRELESS LOCAL AREA NETWORKING / PAPER 20.5 ISSCC 2003 / SESSION 20 / WIRELESS LOCAL AREA NETWORKING / PAPER 20.5 20.5 A 2.4GHz CMOS Transceiver and Baseband Processor Chipset for 802.11b Wireless LAN Application George Chien, Weishi Feng, Yungping

More information

ASR-2300 Multichannel SDR Module for PNT and Mobile communications. Dr. Michael B. Mathews Loctronix, Corporation

ASR-2300 Multichannel SDR Module for PNT and Mobile communications. Dr. Michael B. Mathews Loctronix, Corporation ASR-2300 Multichannel SDR Module for PNT and Mobile communications GNU Radio Conference 2013 October 1, 2013 Boston, Massachusetts Dr. Michael B. Mathews Loctronix, Corporation Loctronix Corporation 2008,

More information

ADI 2006 RF Seminar. Chapter II RF/IF Components and Specifications for Receivers

ADI 2006 RF Seminar. Chapter II RF/IF Components and Specifications for Receivers ADI 2006 RF Seminar Chapter II RF/IF Components and Specifications for Receivers 1 RF/IF Components and Specifications for Receivers Fixed Gain and Variable Gain Amplifiers IQ Demodulators Analog-to-Digital

More information

Indoor Navigation Test Results using an Integrated GPS/TOA/Inertial Navigation System

Indoor Navigation Test Results using an Integrated GPS/TOA/Inertial Navigation System Indoor Navigation Test Results using an Integrated GPS/TOA/Inertial Navigation System Alison Brown and Yan Lu, NAVSYS Corporation BIOGRAPHY Alison Brown is the Chairman and Chief Visionary Officer of NAVSYS

More information

Benefits of combining systems The Receiver s Perspective Dr Philip G Mattos

Benefits of combining systems The Receiver s Perspective Dr Philip G Mattos Benefits of combining systems The Receiver s Perspective Dr Philip G Mattos October 2011 Contents Who we are What s missing in GPS alone Other constellations available Improving GPS only receivers Add

More information

METIS Second Training & Seminar. Smart antenna: Source localization and beamforming

METIS Second Training & Seminar. Smart antenna: Source localization and beamforming METIS Second Training & Seminar Smart antenna: Source localization and beamforming Faculté des sciences de Tunis Unité de traitement et analyse des systèmes haute fréquences Ali Gharsallah Email:ali.gharsallah@fst.rnu.tn

More information

GALILEO JOINT UNDERTAKING

GALILEO JOINT UNDERTAKING GALILEO Research and development activities First call Activity A User receiver preliminary development STATEMENT OF WORK GJU/03/094/issue2/OM/ms Issue 2 094 issue2 6th FP A SOW 1 TABLE OF CONTENTS 1.

More information

EE 570: Location and Navigation

EE 570: Location and Navigation EE 570: Location and Navigation INS/GPS Integration Aly El-Osery 1 Stephen Bruder 2 1 Electrical Engineering Department, New Mexico Tech Socorro, New Mexico, USA 2 Electrical and Computer Engineering Department,

More information

Experimental Characterization of a Large Aperture Array Localization Technique using an SDR Testbench

Experimental Characterization of a Large Aperture Array Localization Technique using an SDR Testbench Experimental Characterization of a Large Aperture Array Localization Technique using an SDR Testbench M. Willerton, D. Yates, V. Goverdovsky and C. Papavassiliou Imperial College London, UK. 30 th November

More information

Exploring Trends in Technology and Testing in Satellite Communications

Exploring Trends in Technology and Testing in Satellite Communications Exploring Trends in Technology and Testing in Satellite Communications Aerospace Defense Symposium Giuseppe Savoia Keysight Technologies Agenda Page 2 Evolving military and commercial satellite communications

More information

Channel Modelling ETI 085

Channel Modelling ETI 085 Channel Modelling ETI 085 Lecture no: 7 Directional channel models Channel sounding Why directional channel models? The spatial domain can be used to increase the spectral efficiency i of the system Smart

More information

THOMAS PANY SOFTWARE RECEIVERS

THOMAS PANY SOFTWARE RECEIVERS TECHNOLOGY AND APPLICATIONS SERIES THOMAS PANY SOFTWARE RECEIVERS Contents Preface Acknowledgments xiii xvii Chapter 1 Radio Navigation Signals 1 1.1 Signal Generation 1 1.2 Signal Propagation 2 1.3 Signal

More information

Benefits and Limitations of New GNSS Signal Designs. Dr. A. J. Van Dierendonck AJ Systems, USA November 18, 2014

Benefits and Limitations of New GNSS Signal Designs. Dr. A. J. Van Dierendonck AJ Systems, USA November 18, 2014 Benefits and Limitations of New GNSS Signal Designs Dr. A. J. Van Dierendonck AJ Systems, USA November 18, 2014 My Opinions on New GNSS Signal Designs This briefing is loosely based upon Leadership Series

More information

A 1.7-to-2.2GHz Full-Duplex Transceiver System with >50dB Self-Interference Cancellation over 42MHz Bandwidth

A 1.7-to-2.2GHz Full-Duplex Transceiver System with >50dB Self-Interference Cancellation over 42MHz Bandwidth A 1.7-to-2.2GHz Full-Duplex Transceiver System with >50dB Self-Interference Cancellation Tong Zhang, Ali Najafi, Chenxin Su, Jacques C. Rudell University of Washington, Seattle Feb. 8, 2017 International

More information

GNSS for UAV Navigation. Sandy Kennedy Nov.15, 2016 ITSNT

GNSS for UAV Navigation. Sandy Kennedy Nov.15, 2016 ITSNT GNSS for UAV Navigation Sandy Kennedy Nov.15, 2016 ITSNT Sounds Easy Enough Probably clear open sky conditions?» Maybe not on take off and landing Straight and level flight?» Not a valid assumption for

More information

MAKING TRANSIENT ANTENNA MEASUREMENTS

MAKING TRANSIENT ANTENNA MEASUREMENTS MAKING TRANSIENT ANTENNA MEASUREMENTS Roger Dygert, Steven R. Nichols MI Technologies, 1125 Satellite Boulevard, Suite 100 Suwanee, GA 30024-4629 ABSTRACT In addition to steady state performance, antennas

More information