COMMITTEE T1 TELECOMMUNICATIONS Working Group T1E1.4 (DSL Access) Costa Mesa, California; March 8-12, 1999
|
|
- Garey Collins
- 6 years ago
- Views:
Transcription
1 COMMITTEE T1 TELECOMMUNICATIONS Working Group T1E1.4 (DSL Access) Costa Mesa, California; March 8-12, 1999 T1E1.4/ CONTRIBUTION TITLE: SOURCE*: PROJECT: AM Ingress on xdsl Loops Nortel Networks T1E1.4, ADSL Standards Project ABSTRACT This contribution presents the findings from activities investigating the levels of ingress present on residential loops due to AM radio transmitters. Additionally, analysis of potential impacts of such levels on Splitterless ADSL performance is presented. NOTICE This contribution has been prepared to assist Standards Committee T1 Telecommunications. This document is offered to the Committee as a basis for discussion and is not a binding proposal on Nortel Networks. The proposed requirements are subject to change in form and numerical value after more study. Specifically, the right to add to, or amend, the statements contained herein is reserved by Nortel Networks. * CONTACT: Edward J. Eckert; ejeckert@nortelnetworks.com; Tel: (919) ; Fax: (919) AUTHORS: M. Drew; mdrew@ nortelnetworks.com; Tel: (613) ; Fax: (613) K. Harris, kharris@nortelnetworks.com; Tel: (613) ; Fax: (613)
2 1. Introduction The demand for high-speed data access by residential users is speeding the deployment of a variety of Digital Subscriber Line systems (xdsl) into many territories. To ensure market acceptance and customer satisfaction, a substantial amount of effort has gone into the specification of loops and impairments for use during product qualification. The current G.992.1, G and G specifications include loop topologies, crosstalk characteristics, impulse noise and POTS activity. Interference due to AM radio ingress is not addressed in these specifications. 2. Background All North American urban centers are served by local AM radio transmitters which are located and engineered in such a way as to serve large numbers of potential listeners. The number of transmitters serving any city tends to increase with population density due to the ability to costeffectively reach a large audience and competitive pressures. Similarly, early xdsl deployment will be most prevalent in urban areas with higher population densities allowing access providers to spread the capital and infrastructure costs over a large numbers of potential customers. Energy from off-air transmitters, such as AM radio, can couple onto twisted pair loops and result in interference at an xdsl receiver. There are a number of factors influencing the differential ingress level on a loop due to a specific AM transmitter. They include the transmitter characteristics such as transmitted power, antenna pattern orientation and proximity. The characteristics of the customer loop also impact the resultant interference. Relevant characteristics include, aerial/buried, length, orientation, drop type and balance. The existence of RFI ingress as a significant impairment has been recognized in the VDSL standards work [1] and it is included as a noise contributor. 3. Ingress Tests Measurements were performed on residential loops located in two Canadian cities. The study included differential ingress levels measured on 42 loops of varying make-ups. Test sites were geographically distributed throughout the cities and include both aerial and buried plant in 60% and 40% proportions respectively. Measurements were performed at the Network Interface Device (NID) with the in-premise cabling disconnected. Differential levels were measured across a 100Ω differential termination without a common-mode connection. 1
3 4. Measurement Results Interference due to individual AM transmitters was clearly evident at almost every home with wide variations observed from home to home. Figure 1 depicts the distribution of levels when the single highest interferer is considered at each home. The worst case interference at the median home is 53 dbm while 10% of homes would experience a worst case interferer of 37 dbm or higher. Maximum AM RFI Maximum Level (dbm) % 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Percentage of Loops Figure 1 Cumulative percentage of loops with differential AM ingress levels below a maximum level Further analysis of the measurement data focussing on the two strongest interferers at each site revealed that the difference between the power levels of the strongest and second-strongest interferer was always less than 6 db, with a median difference of 1.3 db. Figure 2 depicts the maximum ingress level data from Figure 1 with the addition of a second trace corresponding to the second strongest interferer level measured at the homes. 2
4 Maximum Level (dbm) Maximum AM RFI Two Strongest Interferers 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Percentage of Loops Most Powerful Interferor Second Most Powerful Figure 2 Cumulative percentage of loops with differential AM ingress levels below a maximum level for two most significant interferers 5. Potential Impact of AM Ingress on Splitterless ADSL Capacity The effect of AM ingress on downstream capacity when no precautions are taken to limit its influence was simulated in the following way: Frequency domain simulation using tones 36 to 127 Crosstalkers and loops as defined in standard test cases -140 dbm/hz white noise No front end filtering No TDQ No self next (echo) AM Ingressor placed at 540 khz AM Ingressor modeled as a flat white noise 10 khz wide The level of the AM Ingressor (in 10 khz bandwidth) was varied from 30 dbm to 60 dbm, and the capacity compared to that obtained with no ingressor present. The following chart shows the capacity for many of the test cases: 3
5 Capacity versus AM ingress level at 540 khz 100% 90% % of Capacity with no AM Ingress 80% 70% 60% 50% 40% 30% 20% TestCase Extended 11 Extended 12 Extended 13 Extended 14 Extended 15 Extended 16 10% 0% AM ingress level at 540 khz in dbm Figure 3 Percent of Capacity with no AM Ingress versus AM ingress level for Selected Splittlerless ADSL test cases 4
6 It may be observed from the graph that common levels of ingress can have a dramatic effect on splitterless ADSL capacity. As expected those test cases with highest loss are most effected. Test cases with a large portion of lower carriers removed due to cross talk interference are also more severly impacted. The reason for the extent of lost capacity from a narrowband interferer is the noise spreading effect of the windowed DFT sidelobes. The first sidelobe is only 13 db down from the adjacent carrier and subsequent sidelobes fall off at a rate of only 6dB/octave change in frequency. Thus, if precautions are not taken to limit the amplitude of the noise source before the DFT is performed, a narrow band noise source can corrupt all bins. Figure 4 shows the signal at the input to the DFT in test case #2 with a 40 dbm AM ingressor. Figure 5 shows the spreading of the noise observed at the output of the DFT. Figure 4 Signal and Noise Profiles at input to DFT for Test Case #2 with 40 dbm AM ingress at 540 khz 5
7 Figure 5 Signal and Noise Profiles at output of DFT for Test Case #2 with 40 dbm AM ingress at 540 khz It should be noted that, although an in band tone at 540 khz was choosen to show the potential capacity loss due to AM ingress, out of band tones can be even more harmful if they are inadequately filtered and aliased into the middle of the downstream band. It is also important to note that the homes experiencing high ingress due to poor balance will tend to have high levels for more than one AM station. 6. Conclusions and Recommendations AM ingress is a ubiquitous form of interference. Many subscribers have a significant amount of AM ingress on their loops. There are a wide variety of solutions possible to limit the damage done by AM ingressors, and there use will greatly mitigate the capacity loss. However, failure to address the problem could give poor and erratic performance for a significant percentage of subscribers. Those most at risk are the long reach customers specifically targeted by the splitterless ADSL product. Test cases should be developed and included in the splitterless and full-rate ADSL recommendations or associated T1 pointer standard documents as well as in performance 6
8 benchmarking suites to help customers assess performance in the presence of this common interferor. 7. Further Work Further work is needed to produce a reasonable model of AM and HAM ingressors. The template used for VDSL may provide a suitable starting point. Capacity targets will need to be set for whatever model is applied. Contributions on this work are welcomed. References: [1] T1E1.4/98-043R6, Very-high-speed Digital Subscriber Lines, Nov
TITLE: Reducing ADC Resolution by Using Analog Band-pass Filters in FDD based VDSL
COMMITTEE T1-TELECOMUNICATIONS Working Group T1E1.4 (DSL Access) Ottawa, Canada, June 7-11, 1999 T1E1.4/99-334 TITLE: Reducing ADC Resolution by Using Analog Band-pass Filters in FDD based VDSL SOURCE:
More informationCOMMITTEE T1 TELECOMMUNICATIONS. Plano, Texas; 2 December 1998 CONTRIBUTION
COMMITTEE T TELECOMMUNICATIONS Working Group TE.4 Plano, Texas; 2 December 998 TE.4/98-36 CONTRIBUTION TITLE: Equivalent Loss and Equivalent Noise: Figures of Merit for use in Deployment and Spectrum Management
More informationJDSU Presents The Cause and Effects of Bonding and Grounding on xdsl IPTV Services February 12 th, 2009
JDSU Presents The Cause and Effects of Bonding and Grounding on xdsl IPTV Services February 12 th, 2009 Jeff Harmon Account Manager Western Region Triple Play, Data/IP Analysis Solutions Office: 972 692-3705
More informationOptimal Transmit Spectra for Communication on Digital Subscriber Lines
Optimal Transmit Spectra for Communication on Digital Subscriber Lines Rohit V. Gaikwad and Richard G. Baraniuk æ Department of Electrical and Computer Engineering Rice University Houston, Texas, 77005
More informationCHAPTER 4 ADAPTIVE BIT-LOADING WITH AWGN FOR PLAIN LINE AND LINE WITH BRIDGE TAPS
CHAPTER 4 ADAPTIVE BIT-LOADING WITH AWGN FOR PLAIN LINE AND LINE WITH BRIDGE TAPS 4.1 Introduction The transfer function for power line channel was obtained for defined test loops in the previous chapter.
More informationT-BERD /MTS-4000 Multiple Services Test Platform Copper Services Module
COMMUNICATIONS TEST & MEASUREMENT SOLUTIONS T-BERD /MTS-4000 Multiple Services Test Platform Copper Services Module Key Features Complete copper testing from POTS through full-spectrum VDSL/VDSL2 up to
More informationThe Impact of Broadband PLC Over VDSL2 Inside The Home Environment
The Impact of Broadband PLC Over VDSL2 Inside The Home Environment Mussa Bshara and Leo Van Biesen line Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium Tel: +32 (0)2 629.29.46, Fax: +32
More informationLoop Qualification for xdsl
Final Report for xdsl by Master of Science Thesis in Digital Signal Processing Department Applied Signal Processing Ericsson Telecom AB Document Number ETX/X/ARTP-2001: 002 And Department of Signals, Sensors
More informationPERFORMANCE EVALUATION OF A GIGABIT DSL MODEM USING SUPER ORTHOGONAL COMPLETE COMPLEMENTARY CODES UNDER PRACTICAL CROSSTALK CONDITIONS
144 SOUTH AFRICAN INSTITUTE OF ELECTRICAL ENGINEERS Vol.108 4) December 2017 PERFORMANCE EVALUATION OF A GIGABIT DSL MODEM USING SUPER ORTHOGONAL COMPLETE COMPLEMENTARY CODES UNDER PRACTICAL CROSSTALK
More informationVDSL2 radiation and its signal characterisation
VDSL2 radiation and its signal characterisation Overview The EMC committee of the Radio Society of Great Britain has been monitoring sources of RFI for many years. A particular problem for HF communications
More informationThe Impact of Upstream Power Back-Off on VDSL Frequency Planning. Abstract
T1E1.4/99-414 Project: Title: Source: VDSL The Impact of Upstream Power Back-Off on VDSL Frequency Planning Presenter: Krista S. Jacobsen Author: K.S. Jacobsen Texas Instruments 243 Samaritan Drive San
More informationResults You Can Count On
20 khz to 300 MHz Noise Generator for Realistic Gfast Testing Up to 24 Independent Noise Ports Gfast technology promises to bring a wealth of new opportunities to Service Providers as well as manufacturers
More informationDate: December 5, 1999 Dist'n: T1E1.4
12/04/99 1 T1E1.4/99-560 Project: T1E1.4: VDSL Title: Revisiting Bridged Tap and Spectrum Issue for VDSL Performance (560) Contact: J. Cioffi, W. Yu, and G. Ginis Dept of EE, Stanford U., Stanford, CA
More informationETSI TR V1.1.1 ( )
TR 101 953-1-2 V1.1.1 (2003-05) Technical Re Access network xdsl transmission filters; Part 1: ADSL splitters for European deployment; Sub-part 2: Testing methods for High Pass part of ADSL/POTS splitters
More informationETSI TS V1.1.1 ( ) Technical Specification
TS 101 271 V1.1.1 (2009-01) Technical Specification Access Terminals Transmission and Multiplexing (ATTM); Access transmission system on metallic pairs; Very High Speed digital subscriber line system (VDSL2);
More informationCHAPTER 17 THE TELEPHONE CIRCUIT # DEFINITIONS TERMS
CHAPTER 17 THE TELEPHONE CIRCUIT # DEFINITIONS TERMS 1) It comprised of two or more facilities, interconnected in tandem, to provide a transmission path between a source and a destination. Telephone Circuit
More informationACIF C559:2003 PART 2 SPECTRAL COMPATIBILITY DETERMINATION PROCESS
ACIF C559:2003 PART 2 SPECTRAL COMPATIBILITY DETERMINATION PROCESS CONTENTS 1. INTRODUCTION AND OVERVIEW 1 1.1 Introduction 1 1.2 Overview 1 2. ACIF SPECTRAL COMPATIBILITY DETERMINATION PROCESS 3 2.1
More informationETSI TS V1.3.1 ( )
TS 101 388 V1.3.1 (2002-02) Technical Specification Transmission and Multiplexing (TM); Access transmission systems on metallic access cables; Asymmetric Digital Subscriber Line (ADSL) - European specific
More informationETSI TS V1.3.1 ( )
TS 101 388 V1.3.1 (2002-05) Technical Specification Transmission and Multiplexing (TM); Access transmission systems on metallic access cables; Asymmetric Digital Subscriber Line (ADSL) - European specific
More informationRequirements and Test Methods for Very-High-Bit-Rate Digital Subscriber Line (VDSL) Terminal Equipment
VDSL(E) Issue 1 (Provisional) January 2003 Terminal Attachment Program Requirements and Test Methods for Very-High-Bit-Rate Digital Subscriber Line (VDSL) Terminal Equipment Aussi disponible en français
More informationChannel Characteristics and Impairments
ELEX 3525 : Data Communications 2013 Winter Session Channel Characteristics and Impairments is lecture describes some of the most common channel characteristics and impairments. A er this lecture you should
More informationMultiple Antenna Processing for WiMAX
Multiple Antenna Processing for WiMAX Overview Wireless operators face a myriad of obstacles, but fundamental to the performance of any system are the propagation characteristics that restrict delivery
More informationxdsl Modulation Techniques
NEXTEP Broadband White Paper xdsl Modulation Techniques Methods of achieving spectrum-efficient modulation for high quality transmissions. A Nextep Broadband White Paper May 2001 Broadband Networks Group
More informationETSI TR V1.1.1 ( )
TR 101 953-2-2 V1.1.1 (2004-07) Technical Re Access network xdsl transmission filters; Part 2: VDSL splitters for European deployment; Sub-part 2: Specification of Testing methods for high pass part of
More informationAny signal can be decomposed as the sum of orthogonal waveforms (basis functions) Successive transmitted symbols bl interfere with each other
Intersymbol Interference Any signal can be decomposed as the sum of orthogonal waveforms (basis functions) x ( t ) x i i ( t ) i and () t () t dt 0 for i j Modulation : mapping constellation symbols to
More informationPredicting Total Harmonic Distortion (THD) in ADSL Transformers using Behavioural Modeling
Predicting Total Harmonic Distortion (THD) in ADSL Transformers using Behavioural Modeling, J. Neil Ross & Andrew D. Brown S 1 Outline Introduction ADSL Where is the need for the transformer? What are
More informationINDUSTRY CODE ACIF C559:2006 PART 2 SPECTRAL COMPATIBILITY DETERMINATION PROCESS
INDUSTRY CODE ACIF C559:2006 PART 2 SPECTRAL COMPATIBILITY DETERMINATION PROCESS ACIF C559:2006 Unconditioned Local Loop Service (ULLS) Network Deployment Rules Part 2 Spectral Compatibility Determination
More informationETSI TR V1.1.1 ( )
TR 101 830-2 V1.1.1 (2005-10) Technical Report Transmission and Multiplexing (TM); Access networks; Spectral management on metallic access networks; Part 2: Technical methods for performance evaluations
More informationApplication Note: PathTrak QAMTrak Analyzer Functionality. Overview
Overview Increasing customer demand for upstream bandwidth is a welcomed challenge for MSO s as it often stems from growth in profitable bi-directional applications like VoIP and advanced video services.
More informationContribution of Multidimensional Trellis Coding in VDSL Systems
SETIT 005 3 rd International Conference: Sciences of Electronic, Technologies of Information and Telecommunications March 7-31, 005 TUNISIA Contribution of Multidimensional Trellis Coding in VDSL Systems
More informationEFM Capabilities with Plan 998
EFM Capabilities with Plan 998 Performance analysis of the standard VDSL technology using spectral plan 998 Vladimir Oksman Broadcom Corporation October 2001 Slide 1 Supporters Sabit Say, Todd Pett: Next
More informationAre You Ready for DOCSIS 3.1. Presenter: Pete Zarrelli VeEX Field Applications Engineer
Are You Ready for DOCSIS 3.1 Presenter: Pete Zarrelli VeEX Field Applications Engineer Today s Speaker Pete Zarrelli Senior Field Engineer VeEX Inc. (215) 514-1083 pete@veexinc.com 14 Years PBX/Business
More informationAgilent PN 4395-1 Agilent 4395A Network/Spectrum/ Impedance Analyzer Silicon Investigations Repair Information - Contact Us 920-955-3693 www.siliconinvestigations.com ADSL Copper Loop Measurements Product
More informationIMPROVEMENTS TO FM AND IBOC SIGNAL QUALITY THROUGH THE USE OF PRE-EQUALIZATION
IMPROVEMENTS TO FM AND IBOC SIGNAL QUALITY THROUGH THE USE OF PRE-EQUALIZATION Mike Woods Nautel Maine Inc. Bangor, Maine ABSTRACT FM HD Radio transmission, whether pure digital or hybrid (FM+HD), requires
More informationPHY Proposal IEEE Presentation Submission Template (Rev. 8.2)
PHY Proposal IEEE 80.6 Presentation Submission Template (Rev. 8.) Document Number: IEEE 80.6.3p-0/8 Date Submitted: January 9, 00 Source: Randall Schwartz Voice: 650-988-4758 BeamReach Networks, Inc. Fax:
More informationIEEE C a-01/09. IEEE Broadband Wireless Access Working Group <
Project IEEE 82.16 Broadband Wireless Access Working Group Title Coexistence between point to point links and PMP systems (revision 1) Date Submitted Source(s) Re: Abstract Purpose
More informationUWB Impact on IEEE802.11b Wireless Local Area Network
UWB Impact on IEEE802.11b Wireless Local Area Network Matti Hämäläinen 1, Jani Saloranta 1, Juha-Pekka Mäkelä 1, Ian Oppermann 1, Tero Patana 2 1 Centre for Wireless Communications (CWC), University of
More informationMAKING 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 informationWireless Channel Propagation Model Small-scale Fading
Wireless Channel Propagation Model Small-scale Fading Basic Questions T x What will happen if the transmitter - changes transmit power? - changes frequency? - operates at higher speed? Transmit power,
More informationEEG473 Mobile Communications Module 2 : Week # (6) The Cellular Concept System Design Fundamentals
EEG473 Mobile Communications Module 2 : Week # (6) The Cellular Concept System Design Fundamentals Interference and System Capacity Interference is the major limiting factor in the performance of cellular
More informationADSL. Surasak Sanguanpong Last updated: 9 Feb 2001
1/6 Surasak Sanguanpong nguan@ku.ac.th http://www.cpe.ku.ac.th/~nguan Last updated: 9 Feb 2001 What is? 2/6 stands for Asymmetric Digital Subscriber Line is a new, super high-speed modem technology that
More informationInformation on the Evaluation of VHF and UHF Terrestrial Cross-Border Frequency Coordination Requests
Issue 1 May 2013 Spectrum Management and Telecommunications Technical Bulletin Information on the Evaluation of VHF and UHF Terrestrial Cross-Border Frequency Coordination Requests Aussi disponible en
More informationADJACENT BAND COMPATIBILITY OF 400 MHZ TETRA AND ANALOGUE FM PMR AN ANALYSIS COMPLETED USING A MONTE CARLO BASED SIMULATION TOOL
European Radiocommunications Committee (ERC) within the European Conference of Postal and Telecommunications Administrations (CEPT) ADJACENT BAND COMPATIBILITY OF 400 MHZ AND ANALOGUE FM PMR AN ANALYSIS
More informationPart VI: Requirements for Integrated Services Digital Network Terminal Equipment
Issue 9, Amendment 1 September 2012 Spectrum Management and Telecommunications Compliance Specification for Terminal Equipment, Terminal Systems, Network Protection Devices, Connection Arrangements and
More informationSPECIFICATION PTC 273:2012 REQUIREMENTS FOR CONNECTION OF ADSL CPE TO THE TELECOM NETWORK
SPECIFICATION PTC 273:2012 REQUIREMENTS FOR CONNECTION OF ADSL CPE TO THE TELECOM NETWORK Telecom New Zealand November 26 2012 November 26 2012 2/18 PTC273 CONTENTS Telecom Disclaimer 4 1. INTRODUCTION
More informationThe Fundamentals of FFT-Based Signal Analysis and Measurement Michael Cerna and Audrey F. Harvey
Application ote 041 The Fundamentals of FFT-Based Signal Analysis and Measurement Michael Cerna and Audrey F. Harvey Introduction The Fast Fourier Transform (FFT) and the power spectrum are powerful tools
More informationApplication Series. SunSet xdsl: TDR Testing Techniques for DSL Circuits
a step ahead Application Series SunSet xdsl: TDR Testing Techniques for DSL Circuits 22 Great Oaks Blvd, San Jose CA 95119 USA ph 1 408 363 8000 fax 1 408 363 8313 info@sunrisetelecom.com www.sunrisetelecom.com
More informationAdvanced 3G & 4G Wireless Communication Prof. Aditya K. Jaganathan Department of Electrical Engineering Indian Institute of Technology, Kanpur
(Refer Slide Time: 00:17) Advanced 3G & 4G Wireless Communication Prof. Aditya K. Jaganathan Department of Electrical Engineering Indian Institute of Technology, Kanpur Lecture - 32 MIMO-OFDM (Contd.)
More informationTR (draft) V0.0.0 (2005-xx)
M01p20a13.pdf Technical Report Transmission and Multiplexing (TM); Spectral management on metallic access networks; Part 2: Technical methods for performance evaluations Work Item Reference Permanent Document
More informationECE 271 INTRODUCTION TO TELECOMMUNICATION NETWORKS HOMEWORK QUESTIONS ECE 271 HOMEWORK-1
ECE 271 INTRODUCTION TO TELECOMMUNICATION NETWORKS HOMEWORK QUESTIONS Homework Question 1 ECE 271 HOMEWORK-1 Allocated channel bandwidth for commercial TV is 6 MHz. a. Find the maximum number of analog
More informationa. Find the minimum number of samples per second needed to recover the signal without loosing information.
1. The digital signal X(t) given below. X(t) 1 0 1 2 3 4 5 7 8 t (msec) a. If the carrier is sin (2000 π t), plot Amplitude Shift Keying (ASK) Modulated signal. b. If digital level 1 is represented by
More informationEE 304 TELECOMMUNICATIONs ESSENTIALS HOMEWORK QUESTIONS AND ANSWERS
Homework Question 1 EE 304 TELECOMMUNICATIONs ESSENTIALS HOMEWORK QUESTIONS AND ANSWERS Allocated channel bandwidth for commercial TV is 6 MHz. a. Find the maximum number of analog voice channels that
More informationETSI TR V1.3.1 ( )
TR 11 83-1 V1.3.1 (22-12) Technical Report Transmission and Multiplexing (TM); Access networks; Spectral management on metallic access networks; Part 1: Definitions and signal library 2 TR 11 83-1 V1.3.1
More informationDigital Communication Systems. Asymmetric Digital Subscriber Line (ADSL) Gavin Cameron
Digital Communication Systems Asymmetric Digital Subscriber Line (ADSL) Gavin Cameron MSc/PGD Electronics and Communication Engineering May 17, 2000 TABLE OF CONTENTS TABLE OF CONTENTS..........................................................
More informationQUICK REFERENCE GUIDE
QUICK REFERENCE GUIDE Menu and Keys Copper Test TDR, RFL, DMM, wideband, POTS xdsl Test ADSL2+ Annex A/B*, VDSL2 System Software version/options, date/time, power settings Function Keys Escape/Back Power
More informationEENG473 Mobile Communications Module 3 : Week # (12) Mobile Radio Propagation: Small-Scale Path Loss
EENG473 Mobile Communications Module 3 : Week # (12) Mobile Radio Propagation: Small-Scale Path Loss Introduction Small-scale fading is used to describe the rapid fluctuation of the amplitude of a radio
More informationSimultaneous Data Transmission and Spectrum Sensing on Power Lines. Gautham Prasad and Lutz Lampe
Simultaneous Data Transmission and Spectrum Sensing on Power Lines Gautham Prasad and Lutz Lampe Issue Electromagnetic Interference (EMI) Common mode (asymmetric) signals Unshielded wires 2-30 MHz: EMI
More informationContents. Telecom Service Chae Y. Lee. Data Signal Transmission Transmission Impairments Channel Capacity
Data Transmission Contents Data Signal Transmission Transmission Impairments Channel Capacity 2 Data/Signal/Transmission Data: entities that convey meaning or information Signal: electric or electromagnetic
More informationIEEE c-23. IEEE Broadband Wireless Access Working Group <http://ieee802.org/16>
Project Title IEEE 802.16 Broadband Wireless Access Working Group 802.16b PHY: Spectral mask related issues and carrier allocations Date Submitted Source(s) 2001-03-10 Dr. Ir. Nico
More informationOrthogonal Frequency Division Multiplexing & Measurement of its Performance
Available Online at www.ijcsmc.com International Journal of Computer Science and Mobile Computing A Monthly Journal of Computer Science and Information Technology IJCSMC, Vol. 5, Issue. 2, February 2016,
More informationFrancis J. Smith CTO Finesse Wireless Inc.
Impact of the Interference from Intermodulation Products on the Load Factor and Capacity of Cellular CDMA2000 and WCDMA Systems & Mitigation with Interference Suppression White Paper Francis J. Smith CTO
More informationSignals and Systems Lecture 9 Communication Systems Frequency-Division Multiplexing and Frequency Modulation (FM)
Signals and Systems Lecture 9 Communication Systems Frequency-Division Multiplexing and Frequency Modulation (FM) April 11, 2008 Today s Topics 1. Frequency-division multiplexing 2. Frequency modulation
More informationCOMPATIBILITY BETWEEN NARROWBAND DIGITAL PMR/PAMR AND TACTICAL RADIO RELAY IN THE 900 MHz BAND. Cavtat, May 2003
Electronic Communications Committee (ECC) within the European Conference of Postal and Telecommunications Administrations (CEPT) COMPATIBILITY BETWEEN NARROWBAND DIGITAL PMR/PAMR AND TACTICAL RADIO RELAY
More informationCHAPTER 2 WIRELESS CHANNEL
CHAPTER 2 WIRELESS CHANNEL 2.1 INTRODUCTION In mobile radio channel there is certain fundamental limitation on the performance of wireless communication system. There are many obstructions between transmitter
More informationLTE Walk Test Measurements Using Consultix WTX-610 ILLuminator & Test Phones
LTE Walk Test Measurements Using Consultix WTX-610 ILLuminator & Test Phones Ultimate wireless coverage indoors is becoming a fundamental requirement of inbuilding infrastructure whether it s WiFi, cellular,
More informationA GUIDE SECURITY SYSTEM DESIGN QUESTIONS
A GUIDE SECURITY SYSTEM DESIGN QUESTIONS 1. systems have a local alarm that has a 5-minute delay device built in. (a) Proprietary (c) Local (b) Extent of Alarm (d) Police station-connected 2. The primary
More informationETSI TR V1.4.1 ( )
TR 11 83-1 V1.4.1 (26-3) Technical Report Transmission and Multiplexing (TM); Access networks; Spectral management on metallic access networks; Part 1: Definitions and signal library 2 TR 11 83-1 V1.4.1
More informationInstitute of Electrical and Electronics Engineers (IEEE) CHARACTERISTICS OF IEEE SYSTEMS IN MHz
As submitted to ITU-R IEEE L802.16-04/42r3 INTERNATIONAL TELECOMMUNICATION UNION RADIOCOMMUNICATION STUDY GROUPS Document 21 December 2004 English only Received: Institute of Electrical and Electronics
More informationService and technology neutrality - universal service obligations
Service and technology neutrality - universal service obligations Jochen Mezger General Manager Program Distribution Service and technology neutrality EBU spectrum policy 3.6.2008 IRT Mezger Technology
More informationT1E1.4/99-199R2. T1E1.4: VDSL and ITU. Title: VDSL System Requirements Proposals for ITU (99-199R2)
May 31, 1999 1 ` T1E1.4/199R2 T1E1.4/99-199R2 Project: T1E1.4: VDSL and ITU Title: VDSL System Requirements Proposals for ITU (99-199R2) Contact: J. Cioffi (Editor) Information Systems Laboratory Stanford
More informationA METHOD OF CERTIFICATION FOR LTE SMALL CELLS IN THE HFC NETWORK
A METHOD OF CERTIFICATION FOR LTE SMALL CELLS IN THE HFC NETWORK 185 AINSLEY DRIVE SYRACUSE, NY 13210 800.448.1655 I WWW.ARCOMDIGITAL.COM One of the problems associated with installations of LTE Small
More informationCode No: R Set No. 1
Code No: R05220405 Set No. 1 II B.Tech II Semester Regular Examinations, Apr/May 2007 ANALOG COMMUNICATIONS ( Common to Electronics & Communication Engineering and Electronics & Telematics) Time: 3 hours
More informationMedia. Twisted pair db/km at 1MHz 2 km. Coaxial cable 7 db/km at 10 MHz 1 9 km. Optical fibre 0.2 db/km 100 km
Media Attenuation Repeater spacing Twisted pair 10-12 db/km at 1MHz 2 km Coaxial cable 7 db/km at 10 MHz 1 9 km Optical fibre 0.2 db/km 100 km conniq.com provides an excellent tutorial on physical media.
More informationDraft Copper Loop Frequency Management Plan
NM-2564 Issue: 6 Revision 1 Page 1 of 34 Class: [Open] Document No: NM-2564 Draft Copper Loop Frequency Management Plan Issue 6 Revision 1 Keywords Access Network; Spectral Management; NM-2564 Issue: 6
More informationDeployment scenarios and interference analysis using V-band beam-steering antennas
Deployment scenarios and interference analysis using V-band beam-steering antennas 07/2017 Siklu 2017 Table of Contents 1. V-band P2P/P2MP beam-steering motivation and use-case... 2 2. Beam-steering antenna
More informationCharacteristics of In-building Power Lines at High Frequencies and their Channel Capacity
Characteristics of In-building Power Lines at High Frequencies and their Channel Capacity T. Esmailian~ F. R. Kschischang, and P. G. Gulak Department of Electrical and Computer Engineering University of
More informationSignal Leakage Patrolling in the 700 MHz Frequency Band
Signal Leakage Patrolling in the 700 MHz Frequency Band Welcome to the 1 st Quarter 2013 CSEI Technical Report. My last technical report, in the 2 nd Qtr of 2012 (the 3 rd & 4 th quarters of 2012 were
More informationRECOMMENDATION ITU-R BT.1832 * Digital video broadcast-return channel terrestrial (DVB-RCT) deployment scenarios and planning considerations
Rec. ITU-R BT.1832 1 RECOMMENDATION ITU-R BT.1832 * Digital video broadcast-return channel terrestrial (DVB-RCT) deployment scenarios and planning considerations (Question ITU-R 16/6) (2007) Scope This
More informationCable Analysis. Extracting Information from Measured Data. The Performance Leader in Hand-Held Network Tools. Fanny Mlinarsky.
Cable Analysis Extracting Information from Measured Data Fanny Mlinarsky 2-Nov-98 The Performance Leader in Hand-Held Network Tools Introduction Every cable tells a story. Cable certification measurements
More informationIEEE C a-02/08
2002-03-8 IEEE C802.6.2a-02/08 Project Title Date Submitted IEEE 802.6 Broadband Wireless Access Working Group Coexistence Same Area Simulations at 3.5 GHz (Inbound) 2002-03-6 Source G. Jack Garrison Harris
More informationIEEE p802.3bn EPoC. Channel Model Ad Hoc committee Baseline Channel Model
IEEE p802.3bn EPoC Channel Model Ad Hoc committee Baseline Channel Model N-Way 2-Way Headend Baseline Topology Opt TRx HFC TAP TAP TAP TAP CLT CLT EPON OLT CLT CLT RG-6 (+) 150 Ft. (50M) max RG-6 < 6 Ft.
More informationKeywords: ISM, RF, transmitter, short-range, RFIC, switching power amplifier, ETSI
Maxim > Design Support > Technical Documents > Application Notes > Wireless and RF > APP 4929 Keywords: ISM, RF, transmitter, short-range, RFIC, switching power amplifier, ETSI APPLICATION NOTE 4929 Adapting
More informationIT-24 RigExpert. 2.4 GHz ISM Band Universal Tester. User s manual
IT-24 RigExpert 2.4 GHz ISM Band Universal Tester User s manual Table of contents 1. Description 2. Specifications 3. Using the tester 3.1. Before you start 3.2. Turning the tester on and off 3.3. Main
More informationMULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) The key to successful deployment in a dynamically varying non-line-of-sight environment
White Paper Wi4 Fixed: Point-to-Point Wireless Broadband Solutions MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) The key to successful deployment in a dynamically varying non-line-of-sight environment Contents
More informationCable Testing TELECOMMUNICATIONS AND NETWORKING
Cable Testing TELECOMMUNICATIONS AND NETWORKING Analog Signals 2 Digital Signals Square waves, like sine waves, are periodic. However, square wave graphs do not continuously vary with time. The wave holds
More informationBaseline Proposal for EPoC PHY Layer IEEE 802.3bn EPoC September 2012 AVI KLIGER, BROADCOM LEO MONTREUIL, BROADCOM ED BOYD, BROADCOM
Baseline Proposal for EPoC PHY Layer IEEE 802.3bn EPoC September 2012 AVI KLIGER, BROADCOM LEO MONTREUIL, BROADCOM ED BOYD, BROADCOM NOTE This presentation includes results based on an inhouse Channel
More informationPoint-to-Point Communications
Point-to-Point Communications Key Aspects of Communication Voice Mail Tones Alphabet Signals Air Paper Media Language English/Hindi English/Hindi Outline of Point-to-Point Communication 1. Signals basic
More informationERC Recommendation 54-01
ERC Recommendation 54-01 Method of measuring the maximum frequency deviation of FM broadcast emissions in the band 87.5 to 108 MHz at monitoring stations Approved May 1998 Amended 13 February 2015 Amended
More informationABSTRACT. This contribution addresses the following Issues for G.hs (BA-U16R1): 1.1 Agreed (04/99)
ITU - Telecommunication Standardization Sector STUDY GROUP 15 Temporary Document HC-074 Original: English Huntsville, Canada, 31 July - 04 August 2000 Question: 4/15 SOURCE 1 : Broadcom TITLE: G.hs.bis:
More informationCopper Lines and High Speed
Copper Lines and High Speed Application Note 52 Line quality is no coincidence Testing transmission lines for ADSL Test Solutions with the PSM-137 Selective Level Test Set Contents Testing transmission
More informationRECOMMENDATION ITU-R SM Method for measurements of radio noise
Rec. ITU-R SM.1753 1 RECOMMENDATION ITU-R SM.1753 Method for measurements of radio noise (Question ITU-R 1/45) (2006) Scope For radio noise measurements there is a need to have a uniform, frequency-independent
More informationAXS-200/ MHz COPPER TEST SET
AXS-200/610 30 MHz COPPER TEST SET 2011 GLOBAL xdsl TEST EQUIPMENT GROWTH LEADERSHIP AWARD As part of the SharpTESTER Access Line, this tool identifies copper problems affecting triple-play quality SPEC
More informationFederal Communications Commission Office of Engineering and Technology Laboratory Division
Federal Communications Commission Office of Engineering and Technology Laboratory Division June 4, 2013 Measurement Guidance for Certification of Licensed Digital Transmitters 1.0 Introduction and Applicability
More informationAdvanced 3G & 4G Wireless Communication Prof. Aditya K. Jagannatham Department of Electrical Engineering Indian Institute of Technology, Kanpur
Advanced 3G & 4G Wireless Communication Prof. Aditya K. Jagannatham Department of Electrical Engineering Indian Institute of Technology, Kanpur Lecture - 30 OFDM Based Parallelization and OFDM Example
More informationHST-3000 Wideband Copper II (WBII) Service Interface Module (SIM)
COMMUNICATIONS test & measurement solutions JDSU HST-3000 SIM VDSL-IN/WB2 Specs Provided by www.aaatesters.com HST-3000 Wideband Copper II (WBII) Service Interface Module (SIM) Key Features Complete copper
More informationEmerging EMC Threats. Radio Society. Advancing amateur radio since Dr David Lauder G0SNO Dr John Rogers, M0JAV
Emerging EMC Threats Radio Society governance of Great vision teamwork Britain values Dr David Lauder G0SNO Dr John Rogers, M0JAV 1 What do we mean by Emerging Threats? Green Energy Solar PV Wind Farms
More informationn Proper pin termination at each end n Continuity to the remote end n Shorts between any two or more conductors n Transposed pairs: n Crossed pairs.
INTRODUCTION Structured Cabling or data cabling (also known Local Area Network or LAN Cabling) is increasing in its deployment for business, commercial and residential use to carry signaling for networks
More informationCoverage Impact of Implementing Narrowband Equipment. Bernie Olson Chair TIA TR8.18
Coverage Impact of Implementing Narrowband Equipment Bernie Olson Chair TIA TR8.18 It Depends ON Lots of variables to take into consideration Migration process Link Budget Tradeoff of sensitivity and interference
More informationTime and Frequency Domain Windowing of LFM Pulses Mark A. Richards
Time and Frequency Domain Mark A. Richards September 29, 26 1 Frequency Domain Windowing of LFM Waveforms in Fundamentals of Radar Signal Processing Section 4.7.1 of [1] discusses the reduction of time
More informationSpectral Optimization and Joint Signaling Techniques for Communication in the Presence of Crosstalk. Rohit Gaikwad and Richard Baraniuk
Spectral Optimization and Joint Signaling Techniques for Communication in the Presence of Crosstalk Rohit Gaikwad and Richard Baraniuk ECE Technical Report #9806 Rice University July 1998 1 Spectral optimization
More information