Presentation Outline. Advisors: Dr. In Soo Ahn Dr. Thomas L. Stewart. Team Members: Luke Vercimak Karl Weyeneth. Karl. Luke

Size: px
Start display at page:

Download "Presentation Outline. Advisors: Dr. In Soo Ahn Dr. Thomas L. Stewart. Team Members: Luke Vercimak Karl Weyeneth. Karl. Luke"

Transcription

1 Bradley University Department of Electrical and Computer Engineering Senior Capstone Project Presentation May 2nd, 2006 Team Members: Luke Vercimak Karl Weyeneth Advisors: Dr. In Soo Ahn Dr. Thomas L. Stewart Presentation Outline Karl Project Summary Functional Description Block Diagram Datasheet Equipment and Software Supporting Software RTDX Radio Design QAM Modulation OFDM Modulation Interpolation Quadrature Modulation Channel Quadrature Demodulation Luke Radio Design Continued Decimation OFDM Frame Synchronization Frame Timing Detail OFDM Demodulation Phase Compensation QAM Decoding DSP Board Implementation Results Synchronization Results and Analysis Future Projects Conclusions 1

2 Project Summary Using the IEEE a standard as a guideline, a software radio will be developed that will modulate and demodulate binary data. The goals are: Successful modulation and demodulation of digital data above baseband frequencies. Reasonable compensation for channel and receiver problems, focusing primarily on synchronization. Reliable communication link between DSP (Digital Signal Processing) board and a host computer. Functional Description Input Digital Data (text / computer data file) Output Digital Data (text / computer data file) Modes of Operation Transmitter Receiver Channel Simulation (when actual channel is not being used) 2

3 Block Diagram Parts of Software Radio: Transmitter Changes the data from the file into a signal that can be transmitted over the channel. Channel The path or medium that the transmitter and receiver are designed to transmit through. Receiver Recovers the data from the signal that was transmitted over the channel and converts it back into data. Datasheet The following are the final specifications for the software radio: The on board A/D converter s maximum sampling rate is 96KHz. Limits Parameter Sampling Rate Modulation Frequency Data Rate F samp F mod R Symbol Min Typical Max Units KHz KHz Kbps 3

4 Equipment & Software List 2 Texas Instruments DSP Starter Kits (TMDSDSK6713) 2 Computers Matlab Simulink 6.2 Code Composer Studio 3.1 Microsoft Visual Studio 2005 Supporting Software - RTDX Simulink blocks were developed to transmit and receive data to and from the board using RTDX (Real Time Data Exchange). A RTDX interface application was designed and implemented in C# to communicate with the DSP board. 4

5 1 Test_data Radio Design Buffer s^(t) g^(t) Quadrature Demodulator In Out QAM Encoder In1 Manual Switch In Out Decimation Image In Viewer s^(t) w s_b(t) OFDM Modulation In s^(t) Out s(t) Channel Frame Synch In g^(t) w^ OFDM Demodulation Out Interpolation In s_b(t) s(t) Quadrature Modulator Out QAM Decoder Discrete-Time Scatter Plot Scope In1 Image Out Viewer Radio Divided into subsystems: QAM Encoder OFDM Modulation Interpolation Quadrature Modulation Channel Quadrature Demodulation Decimation Frame Synchronization OFDM Demodulation Phase Compensation QAM Decoder QAM Modulation Four level QAM (Quadrature Amplitude Modulation) is used to modulate the data. Pairs of bits are mapped onto the complex plane and the resulting complex numbers are the desired QAM symbols. These QAM symbols are phasors that store the information of the bits in the amplitude and phase of a sinusoid. 1+ j = 1 j = Phasors 5

6 OFDM Modulation... 1+j -1+j 1-j -1-j OFDM Spectrum Fs/2 -Fs/2 QAM symbols are encoded in an OFDM (Orthogonal Frequency Division Multiplexing) symbol with an IFFT (Inverse Fast Fourier Transform). A guard interval is added to reduce multi-path interference. A raised cosine window function is also applied to reduce inter-symbol interference. Interpolation The sampling rate needs to be increased so that the signal can be modulated onto a carrier. Information encoded on the amplitude and phase of signal needs to be preserved during up-sampling. Filters need to be FIR (Finite Impulse Response). This increases the filter order, but allows for linear phase correction. Up-sampling is done in two phases in order to increase the filter transition region; reducing filter order. 1 In [96x1] [96x1] [96x1] [96x1] [96x1] [96x1] Upsample FDATool Initial Upsampling Filter Second Upsample FDATool Second Upsampling Filter Upsampling Amplitude Correction 1 Out 6

7 Quadrature Modulation In-phase and quadrature components are modulated and mixed from baseband signals to an intermediate frequency. The intermediate frequency signals are summed together to form the transmitter output. 1 s_b(t) DSP Cosine Wave DSP Sine Wave Re(u) Im(u) Complex to Real-Imag Product Product2 Add 1 s(t) Channel Channel should model the environment that the radio signal will be transmitted through. The channel model includes noise sources, multi-path interference, and attenuation. The receiver was designed to accommodate for these problems. 0.8 Gain 0.15 Gain Gain2 z -53 Delay z -55 Delay1 z -57 Delay2 Add Gaussian Gaussian Noise Generator 7

8 Quadrature Demodulation In-phase and quadrature parts of incoming signal are detected and mixed back to baseband with quadrature demodulation. The real and imaginary parts are recombined into an imaginary signal. DSP Cosine Wave DSP 1 s^(t) Sine Wave Product1 Product2 2 2 InPhase Mixing Gain Quad Mixing Gain Re Im Real-Imag to Complex 1 g^(t) Presentation Outline Karl Project Summary Functional Description Block Diagram Datasheet Equipment and Software Supporting Software RTDX Radio Design QAM Modulation OFDM Modulation Interpolation Quadrature Modulation Channel Quadrature Demodulation Luke Radio Design Continued Decimation OFDM Frame Synchronization Frame Timing Detail OFDM Demodulation Phase Compensation QAM Decoding DSP Board Implementation Results Synchronization Results and Analysis Future Projects Conclusions 8

9 Decimation Extra information contained in the samples is eliminated so that OFDM frame can fit in one 64 point FFT (Fast Fourier Transform). The signal is filtered to remove high frequency interference and then down-sampled. OFDM Frame Synchronization The start of each OFDM frame needs to be determined in order to properly demodulate the OFDM frames. The pseudo-random short preamble defined in the IEEE a specification is sent before the OFDM frames to time the receiver. The receiver identifies the preamble using statistical analysis with cross and autocorrelations to identify the end of the preamble. Autocorrelation is used to find the general area of the preamble. Cross correlation is used for precise location of end of preamble. 9

10 Frame Timing Detail 1.5 Preamble Cross Correlation Preamble Auto Correlation 7 * Standard Deviation of Input Frame Timing Detail 1 Magnitude Time (samples) OFDM Demodulation The FFT used to extract QAM symbols from an OFDM symbol. Phase effects of the channel and radio can be corrected in the frequency domain. 10

11 Phase Compensation θdelay dθ df dθ f df dθ θ ( f ) = θdelay + f df Delays in the radio and channel, as well as phase and frequency mismatches in modulation cause linear phase corruption. The known phase of the pilots are used to determine the correction needed for each sub-carrier. QAM Decoding The sign of the QAM symbols real and imaginary parts are used to determine the bits that they represent. The QAM symbols are decoded back to their original bit representations. 11

12 DSP Board Implementation The DSP board overruns Reduce Sampling Rate? Optimize Code? Increase Board speed? Fixed Point? Results This picture is our test data. The picture was changed to digital data and sent into the input side of the radio transmitter. 12

13 Results This signal represents part of the picture of Bradley hall after it is sent through the channel OFDM transmitted signal after channel corruption Magnitude Time (t) Synchronization Results Unsynchronized Synchronized 13

14 Results Bradley hall then comes through the transmitter as QAM points and then out the other end of the receiver. Performance Analysis S N R vs E rrors Effect of Frequency Offset Noise Power No Channel Noise Power Errors Per symbols Errors per symbols S N R Errors inversely proportional to SNR. Frequency offset marginally increases error. Noise interferes with synchronization lock Frequency Offset (Hz) 14

15 Project Conclusions A successful communication scheme was simulated using a variation of the IEEE a specification. Message and carrier synchronization problems were studied and solved. The software radio was reliable under reasonable noise and multi-path conditions. A reliable communication interface with Simulink blocks and the DSP board was designed and implemented. Future Projects or Extensions Figure out how to profile and optimize subsystems so that the code can be run on the 6713 DSK boards. Add coding to radio to provide robustness against errors. Create RF hardware for radio so that the signal can be transmitted over a real channel. Increase QAM level from four and add automatic gain control. 15

16 Questions, Comments? 16

Presentation Outline. Advisors: Dr. In Soo Ahn Dr. Thomas L. Stewart. Team Members: Luke Vercimak Karl Weyeneth

Presentation Outline. Advisors: Dr. In Soo Ahn Dr. Thomas L. Stewart. Team Members: Luke Vercimak Karl Weyeneth Bradley University Department of Electrical and Computer Engineering Senior Capstone Project Proposal December 6 th, 2005 Team Members: Luke Vercimak Karl Weyeneth Advisors: Dr. In Soo Ahn Dr. Thomas L.

More information

Software Defined Radio

Software Defined Radio Software Defined Radio 2006 Senior Capstone Project (EE 452) Luke Vercimak and Karl Weyeneth Advisors: Dr. In Soo Ahn and Dr. Thomas L. Stewart Bradley University ECE Department Abstract A software defined

More information

A GENERAL SYSTEM DESIGN & IMPLEMENTATION OF SOFTWARE DEFINED RADIO SYSTEM

A GENERAL SYSTEM DESIGN & IMPLEMENTATION OF SOFTWARE DEFINED RADIO SYSTEM A GENERAL SYSTEM DESIGN & IMPLEMENTATION OF SOFTWARE DEFINED RADIO SYSTEM 1 J. H.VARDE, 2 N.B.GOHIL, 3 J.H.SHAH 1 Electronics & Communication Department, Gujarat Technological University, Ahmadabad, India

More information

Using Modern Design Tools To Evaluate Complex Communication Systems: A Case Study on QAM, FSK and OFDM Transceiver Design

Using Modern Design Tools To Evaluate Complex Communication Systems: A Case Study on QAM, FSK and OFDM Transceiver Design Using Modern Design Tools To Evaluate Complex Communication Systems: A Case Study on QAM, FSK and OFDM Transceiver Design SOTIRIS H. KARABETSOS, SPYROS H. EVAGGELATOS, SOFIA E. KONTAKI, EVAGGELOS C. PICASIS,

More information

Practical issue: Group definition. TSTE17 System Design, CDIO. Quadrature Amplitude Modulation (QAM) Components of a digital communication system

Practical issue: Group definition. TSTE17 System Design, CDIO. Quadrature Amplitude Modulation (QAM) Components of a digital communication system 1 2 TSTE17 System Design, CDIO Introduction telecommunication OFDM principle How to combat ISI How to reduce out of band signaling Practical issue: Group definition Project group sign up list will be put

More information

OFDM Systems For Different Modulation Technique

OFDM Systems For Different Modulation Technique Computing For Nation Development, February 08 09, 2008 Bharati Vidyapeeth s Institute of Computer Applications and Management, New Delhi OFDM Systems For Different Modulation Technique Mrs. Pranita N.

More information

Lecture 13. Introduction to OFDM

Lecture 13. Introduction to OFDM Lecture 13 Introduction to OFDM Ref: About-OFDM.pdf Orthogonal frequency division multiplexing (OFDM) is well-known to be effective against multipath distortion. It is a multicarrier communication scheme,

More information

Implementation of OFDM Modulated Digital Communication Using Software Defined Radio Unit For Radar Applications

Implementation of OFDM Modulated Digital Communication Using Software Defined Radio Unit For Radar Applications Volume 118 No. 18 2018, 4009-4018 ISSN: 1311-8080 (printed version); ISSN: 1314-3395 (on-line version) url: http://www.ijpam.eu ijpam.eu Implementation of OFDM Modulated Digital Communication Using Software

More information

Chapter 7. Multiple Division Techniques

Chapter 7. Multiple Division Techniques Chapter 7 Multiple Division Techniques 1 Outline Frequency Division Multiple Access (FDMA) Division Multiple Access (TDMA) Code Division Multiple Access (CDMA) Comparison of FDMA, TDMA, and CDMA Walsh

More information

Design and Implementation of Orthogonal Frequency Division Multiplexing (OFDM) Signaling

Design and Implementation of Orthogonal Frequency Division Multiplexing (OFDM) Signaling Design and Implementation of Orthogonal Frequency Division Multiplexing (OFDM) Signaling Research Project Description Study by: Alan C. Brooks Stephen J. Hoelzer Department: Electrical and Computer Engineering

More information

Lecture 3: Wireless Physical Layer: Modulation Techniques. Mythili Vutukuru CS 653 Spring 2014 Jan 13, Monday

Lecture 3: Wireless Physical Layer: Modulation Techniques. Mythili Vutukuru CS 653 Spring 2014 Jan 13, Monday Lecture 3: Wireless Physical Layer: Modulation Techniques Mythili Vutukuru CS 653 Spring 2014 Jan 13, Monday Modulation We saw a simple example of amplitude modulation in the last lecture Modulation how

More information

Performance Evaluation of STBC-OFDM System for Wireless Communication

Performance Evaluation of STBC-OFDM System for Wireless Communication Performance Evaluation of STBC-OFDM System for Wireless Communication Apeksha Deshmukh, Prof. Dr. M. D. Kokate Department of E&TC, K.K.W.I.E.R. College, Nasik, apeksha19may@gmail.com Abstract In this paper

More information

Mobile & Wireless Networking. Lecture 2: Wireless Transmission (2/2)

Mobile & Wireless Networking. Lecture 2: Wireless Transmission (2/2) 192620010 Mobile & Wireless Networking Lecture 2: Wireless Transmission (2/2) [Schiller, Section 2.6 & 2.7] [Reader Part 1: OFDM: An architecture for the fourth generation] Geert Heijenk Outline of Lecture

More information

An Efficient Design and Implementation of Software Radio System

An Efficient Design and Implementation of Software Radio System gopalax -International Journal of Technology And Engineering System(IJTES): Jan March 2011- Vol.2.No.2. An Efficient Design and Implementation of Software Radio System A.Sivagami*, B.Shoba**,P.Raja* Department

More information

EE452 Senior Capstone Project: Integration of Matlab Tools for DSP Code Generation. Kwadwo Boateng Charles Badu. May 8, 2006

EE452 Senior Capstone Project: Integration of Matlab Tools for DSP Code Generation. Kwadwo Boateng Charles Badu. May 8, 2006 EE452 Senior Capstone Project: Integration of Matlab Tools for DSP Code Generation Kwadwo Boateng Charles Badu May 8, 2006 Bradley University College of Engineering and Technology Electrical and Computer

More information

Laboratory 5: Spread Spectrum Communications

Laboratory 5: Spread Spectrum Communications Laboratory 5: Spread Spectrum Communications Cory J. Prust, Ph.D. Electrical Engineering and Computer Science Department Milwaukee School of Engineering Last Update: 19 September 2018 Contents 0 Laboratory

More information

Performance Evaluation of Wireless Communication System Employing DWT-OFDM using Simulink Model

Performance Evaluation of Wireless Communication System Employing DWT-OFDM using Simulink Model Performance Evaluation of Wireless Communication System Employing DWT-OFDM using Simulink Model M. Prem Anand 1 Rudrashish Roy 2 1 Assistant Professor 2 M.E Student 1,2 Department of Electronics & Communication

More information

Implementation and Comparative analysis of Orthogonal Frequency Division Multiplexing (OFDM) Signaling Rashmi Choudhary

Implementation and Comparative analysis of Orthogonal Frequency Division Multiplexing (OFDM) Signaling Rashmi Choudhary Implementation and Comparative analysis of Orthogonal Frequency Division Multiplexing (OFDM) Signaling Rashmi Choudhary M.Tech Scholar, ECE Department,SKIT, Jaipur, Abstract Orthogonal Frequency Division

More information

Ultra Wideband Research and Implementation

Ultra Wideband Research and Implementation Ultra Wideband Research and Implementation Senior Capstone Project 2007 Final Report by: Jarrod Cook Nathan Gove Project Advisors: Dr. Brian Huggins Dr. In Soo Ahn Dr. Prasad Shastry Abstract Ultra wideband

More information

Performance Evaluation of OFDM System with Rayleigh, Rician and AWGN Channels

Performance Evaluation of OFDM System with Rayleigh, Rician and AWGN Channels Performance Evaluation of OFDM System with Rayleigh, Rician and AWGN Channels Abstract A Orthogonal Frequency Division Multiplexing (OFDM) scheme offers high spectral efficiency and better resistance to

More information

Chapter 7 Multiple Division Techniques for Traffic Channels

Chapter 7 Multiple Division Techniques for Traffic Channels Introduction to Wireless & Mobile Systems Chapter 7 Multiple Division Techniques for Traffic Channels Outline Introduction Concepts and Models for Multiple Divisions Frequency Division Multiple Access

More information

Orthogonal frequency division multiplexing (OFDM)

Orthogonal frequency division multiplexing (OFDM) Orthogonal frequency division multiplexing (OFDM) OFDM was introduced in 1950 but was only completed in 1960 s Originally grew from Multi-Carrier Modulation used in High Frequency military radio. Patent

More information

2002 IEEE International Solid-State Circuits Conference 2002 IEEE

2002 IEEE International Solid-State Circuits Conference 2002 IEEE Outline 802.11a Overview Medium Access Control Design Baseband Transmitter Design Baseband Receiver Design Chip Details What is 802.11a? IEEE standard approved in September, 1999 12 20MHz channels at 5.15-5.35

More information

Simulation Study and Performance Comparison of OFDM System with QPSK and BPSK

Simulation Study and Performance Comparison of OFDM System with QPSK and BPSK Simulation Study and Performance Comparison of OFDM System with QPSK and BPSK 1 Mr. Adesh Kumar, 2 Mr. Sudeep Singh, 3 Mr. Shashank, 4 Asst. Prof. Mr. Kuldeep Sharma (Guide) M. Tech (EC), Monad University,

More information

Chapter 0 Outline. NCCU Wireless Comm. Lab

Chapter 0 Outline. NCCU Wireless Comm. Lab Chapter 0 Outline Chapter 1 1 Introduction to Orthogonal Frequency Division Multiplexing (OFDM) Technique 1.1 The History of OFDM 1.2 OFDM and Multicarrier Transmission 1.3 The Applications of OFDM 2 Chapter

More information

Simulative Investigations for Robust Frequency Estimation Technique in OFDM System

Simulative Investigations for Robust Frequency Estimation Technique in OFDM System , pp. 187-192 http://dx.doi.org/10.14257/ijfgcn.2015.8.4.18 Simulative Investigations for Robust Frequency Estimation Technique in OFDM System Kussum Bhagat 1 and Jyoteesh Malhotra 2 1 ECE Department,

More information

Point-to-Point Communications

Point-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 information

Communication Channels

Communication Channels Communication Channels wires (PCB trace or conductor on IC) optical fiber (attenuation 4dB/km) broadcast TV (50 kw transmit) voice telephone line (under -9 dbm or 110 µw) walkie-talkie: 500 mw, 467 MHz

More information

EC 551 Telecommunication System Engineering. Mohamed Khedr

EC 551 Telecommunication System Engineering. Mohamed Khedr EC 551 Telecommunication System Engineering Mohamed Khedr http://webmail.aast.edu/~khedr 1 Mohamed Khedr., 2008 Syllabus Tentatively Week 1 Week 2 Week 3 Week 4 Week 5 Week 6 Week 7 Week 8 Week 9 Week

More information

Mobile Computing GNU Radio Laboratory1: Basic test

Mobile Computing GNU Radio Laboratory1: Basic test Mobile Computing GNU Radio Laboratory1: Basic test 1. Now, let us try a python file. Download, open, and read the file base.py, which contains the Python code for the flowgraph as in the previous test.

More information

OFDM AS AN ACCESS TECHNIQUE FOR NEXT GENERATION NETWORK

OFDM AS AN ACCESS TECHNIQUE FOR NEXT GENERATION NETWORK OFDM AS AN ACCESS TECHNIQUE FOR NEXT GENERATION NETWORK Akshita Abrol Department of Electronics & Communication, GCET, Jammu, J&K, India ABSTRACT With the rapid growth of digital wireless communication

More information

Lab 2: Digital Modulations

Lab 2: Digital Modulations Lab 2: Digital Modulations Due: November 1, 2018 In this lab you will use a hardware device (RTL-SDR which has a frequency range of 25 MHz 1.75 GHz) to implement a digital receiver with Quaternary Phase

More information

Ultra Wideband Transceiver Design

Ultra Wideband Transceiver Design Ultra Wideband Transceiver Design By: Wafula Wanjala George For: Bachelor Of Science In Electrical & Electronic Engineering University Of Nairobi SUPERVISOR: Dr. Vitalice Oduol EXAMINER: Dr. M.K. Gakuru

More information

Wireless Communication Systems: Implementation perspective

Wireless Communication Systems: Implementation perspective Wireless Communication Systems: Implementation perspective Course aims To provide an introduction to wireless communications models with an emphasis on real-life systems To investigate a major wireless

More information

UNIFIED DIGITAL AUDIO AND DIGITAL VIDEO BROADCASTING SYSTEM USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEM

UNIFIED DIGITAL AUDIO AND DIGITAL VIDEO BROADCASTING SYSTEM USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEM UNIFIED DIGITAL AUDIO AND DIGITAL VIDEO BROADCASTING SYSTEM USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEM 1 Drakshayini M N, 2 Dr. Arun Vikas Singh 1 drakshayini@tjohngroup.com, 2 arunsingh@tjohngroup.com

More information

QUESTION BANK SUBJECT: DIGITAL COMMUNICATION (15EC61)

QUESTION BANK SUBJECT: DIGITAL COMMUNICATION (15EC61) QUESTION BANK SUBJECT: DIGITAL COMMUNICATION (15EC61) Module 1 1. Explain Digital communication system with a neat block diagram. 2. What are the differences between digital and analog communication systems?

More information

2.

2. PERFORMANCE ANALYSIS OF STBC-MIMO OFDM SYSTEM WITH DWT & FFT Shubhangi R Chaudhary 1,Kiran Rohidas Jadhav 2. Department of Electronics and Telecommunication Cummins college of Engineering for Women Pune,

More information

THE DESIGN OF A PLC MODEM AND ITS IMPLEMENTATION USING FPGA CIRCUITS

THE DESIGN OF A PLC MODEM AND ITS IMPLEMENTATION USING FPGA CIRCUITS Journal of ELECTRICAL ENGINEERING, VOL. 60, NO. 1, 2009, 43 47 THE DESIGN OF A PLC MODEM AND ITS IMPLEMENTATION USING FPGA CIRCUITS Rastislav Róka For the exploitation of PLC modems, it is necessary to

More information

Performance Evaluation using M-QAM Modulated Optical OFDM Signals

Performance Evaluation using M-QAM Modulated Optical OFDM Signals Proc. of Int. Conf. on Recent Trends in Information, Telecommunication and Computing, ITC Performance Evaluation using M-QAM Modulated Optical OFDM Signals Harsimran Jit Kaur 1 and Dr.M. L. Singh 2 1 Chitkara

More information

Receiver Designs for the Radio Channel

Receiver Designs for the Radio Channel Receiver Designs for the Radio Channel COS 463: Wireless Networks Lecture 15 Kyle Jamieson [Parts adapted from C. Sodini, W. Ozan, J. Tan] Today 1. Delay Spread and Frequency-Selective Fading 2. Time-Domain

More information

DIGITAL COMMUNICATIONS SYSTEMS. MSc in Electronic Technologies and Communications

DIGITAL COMMUNICATIONS SYSTEMS. MSc in Electronic Technologies and Communications DIGITAL COMMUNICATIONS SYSTEMS MSc in Electronic Technologies and Communications Bandpass binary signalling The common techniques of bandpass binary signalling are: - On-off keying (OOK), also known as

More information

An Equalization Technique for Orthogonal Frequency-Division Multiplexing Systems in Time-Variant Multipath Channels

An Equalization Technique for Orthogonal Frequency-Division Multiplexing Systems in Time-Variant Multipath Channels IEEE TRANSACTIONS ON COMMUNICATIONS, VOL 47, NO 1, JANUARY 1999 27 An Equalization Technique for Orthogonal Frequency-Division Multiplexing Systems in Time-Variant Multipath Channels Won Gi Jeon, Student

More information

Bit Error Rate Performance Evaluation of Various Modulation Techniques with Forward Error Correction Coding of WiMAX

Bit Error Rate Performance Evaluation of Various Modulation Techniques with Forward Error Correction Coding of WiMAX Bit Error Rate Performance Evaluation of Various Modulation Techniques with Forward Error Correction Coding of WiMAX Amr Shehab Amin 37-20200 Abdelrahman Taha 31-2796 Yahia Mobasher 28-11691 Mohamed Yasser

More information

SPARSE CHANNEL ESTIMATION BY PILOT ALLOCATION IN MIMO-OFDM SYSTEMS

SPARSE CHANNEL ESTIMATION BY PILOT ALLOCATION IN MIMO-OFDM SYSTEMS SPARSE CHANNEL ESTIMATION BY PILOT ALLOCATION IN MIMO-OFDM SYSTEMS Puneetha R 1, Dr.S.Akhila 2 1 M. Tech in Digital Communication B M S College Of Engineering Karnataka, India 2 Professor Department of

More information

Performance Analysis of OFDM for Different Digital Modulation Schemes using Matlab Simulation

Performance Analysis of OFDM for Different Digital Modulation Schemes using Matlab Simulation J. Bangladesh Electron. 10 (7-2); 7-11, 2010 Performance Analysis of OFDM for Different Digital Modulation Schemes using Matlab Simulation Md. Shariful Islam *1, Md. Asek Raihan Mahmud 1, Md. Alamgir Hossain

More information

Signal Processing Techniques for Software Radio

Signal Processing Techniques for Software Radio Signal Processing Techniques for Software Radio Behrouz Farhang-Boroujeny Department of Electrical and Computer Engineering University of Utah c 2007, Behrouz Farhang-Boroujeny, ECE Department, University

More information

4x4 Time-Domain MIMO encoder with OFDM Scheme in WIMAX Context

4x4 Time-Domain MIMO encoder with OFDM Scheme in WIMAX Context 4x4 Time-Domain MIMO encoder with OFDM Scheme in WIMAX Context Mohamed.Messaoudi 1, Majdi.Benzarti 2, Salem.Hasnaoui 3 Al-Manar University, SYSCOM Laboratory / ENIT, Tunisia 1 messaoudi.jmohamed@gmail.com,

More information

Bit error rate simulation using 16 qam technique in matlab

Bit error rate simulation using 16 qam technique in matlab Volume :2, Issue :5, 59-64 May 2015 www.allsubjectjournal.com e-issn: 2349-4182 p-issn: 2349-5979 Impact Factor: 3.762 Ravi Kant Gupta M.Tech. Scholar, Department of Electronics & Communication, Bhagwant

More information

COMPARISON OF CHANNEL ESTIMATION AND EQUALIZATION TECHNIQUES FOR OFDM SYSTEMS

COMPARISON OF CHANNEL ESTIMATION AND EQUALIZATION TECHNIQUES FOR OFDM SYSTEMS COMPARISON OF CHANNEL ESTIMATION AND EQUALIZATION TECHNIQUES FOR OFDM SYSTEMS Sanjana T and Suma M N Department of Electronics and communication, BMS College of Engineering, Bangalore, India ABSTRACT In

More information

Decoding a Signal in Noise

Decoding a Signal in Noise Department of Electrical & Computer Engineering McGill University ECSE-490 DSP Laboratory Experiment 2 Decoding a Signal in Noise 2.1 Purpose Imagine that you have obtained through some, possibly suspect,

More information

Problems from the 3 rd edition

Problems from the 3 rd edition (2.1-1) Find the energies of the signals: a) sin t, 0 t π b) sin t, 0 t π c) 2 sin t, 0 t π d) sin (t-2π), 2π t 4π Problems from the 3 rd edition Comment on the effect on energy of sign change, time shifting

More information

Comparison of ML and SC for ICI reduction in OFDM system

Comparison of ML and SC for ICI reduction in OFDM system Comparison of and for ICI reduction in OFDM system Mohammed hussein khaleel 1, neelesh agrawal 2 1 M.tech Student ECE department, Sam Higginbottom Institute of Agriculture, Technology and Science, Al-Mamon

More information

ELT Receiver Architectures and Signal Processing Fall Mandatory homework exercises

ELT Receiver Architectures and Signal Processing Fall Mandatory homework exercises ELT-44006 Receiver Architectures and Signal Processing Fall 2014 1 Mandatory homework exercises - Individual solutions to be returned to Markku Renfors by email or in paper format. - Solutions are expected

More information

Experimenting with Orthogonal Frequency-Division Multiplexing OFDM Modulation

Experimenting with Orthogonal Frequency-Division Multiplexing OFDM Modulation FUTEBOL Federated Union of Telecommunications Research Facilities for an EU-Brazil Open Laboratory Experimenting with Orthogonal Frequency-Division Multiplexing OFDM Modulation The content of these slides

More information

BER ANALYSIS OF WiMAX IN MULTIPATH FADING CHANNELS

BER ANALYSIS OF WiMAX IN MULTIPATH FADING CHANNELS BER ANALYSIS OF WiMAX IN MULTIPATH FADING CHANNELS Navgeet Singh 1, Amita Soni 2 1 P.G. Scholar, Department of Electronics and Electrical Engineering, PEC University of Technology, Chandigarh, India 2

More information

Frame Synchronization Symbols for an OFDM System

Frame Synchronization Symbols for an OFDM System Frame Synchronization Symbols for an OFDM System Ali A. Eyadeh Communication Eng. Dept. Hijjawi Faculty for Eng. Technology Yarmouk University, Irbid JORDAN aeyadeh@yu.edu.jo Abstract- In this paper, the

More information

Signal Processing Toolbox

Signal Processing Toolbox Signal Processing Toolbox Perform signal processing, analysis, and algorithm development Signal Processing Toolbox provides industry-standard algorithms for analog and digital signal processing (DSP).

More information

SOFTWARE DEFINED RADIO IMPLEMENTATION IN 3GPP SYSTEMS

SOFTWARE DEFINED RADIO IMPLEMENTATION IN 3GPP SYSTEMS SOFTWARE DEFINED RADIO IMPLEMENTATION IN 3GPP SYSTEMS R. Janani, A. Manikandan and V. Venkataramanan Arunai College of Engineering, Thiruvannamalai, India E-Mail: jananisaraswathi@gmail.com ABSTRACT Radio

More information

EECS 307: Lab Handout 2 (FALL 2012)

EECS 307: Lab Handout 2 (FALL 2012) EECS 307: Lab Handout 2 (FALL 2012) I- Audio Transmission of a Single Tone In this part you will modulate a low-frequency audio tone via AM, and transmit it with a carrier also in the audio range. The

More information

Orthogonal Frequency Division Multiplexing (OFDM) based Uplink Multiple Access Method over AWGN and Fading Channels

Orthogonal Frequency Division Multiplexing (OFDM) based Uplink Multiple Access Method over AWGN and Fading Channels Orthogonal Frequency Division Multiplexing (OFDM) based Uplink Multiple Access Method over AWGN and Fading Channels Prashanth G S 1 1Department of ECE, JNNCE, Shivamogga ---------------------------------------------------------------------***----------------------------------------------------------------------

More information

OFDM Transceiver using Verilog Proposal

OFDM Transceiver using Verilog Proposal OFDM Transceiver using Verilog Proposal PAUL PETHSOMVONG ZACH ASAL DEPARTMENT OF ELECTRICAL ENGINEERING BRADLEY UNIVERSITY PEORIA, ILLINOIS NOVEMBER 21, 2013 1 Project Outline Orthogonal Frequency Division

More information

Appendix B. Design Implementation Description For The Digital Frequency Demodulator

Appendix B. Design Implementation Description For The Digital Frequency Demodulator Appendix B Design Implementation Description For The Digital Frequency Demodulator The DFD design implementation is divided into four sections: 1. Analog front end to signal condition and digitize the

More information

Performance Analysis of OFDM System with QPSK for Wireless Communication

Performance Analysis of OFDM System with QPSK for Wireless Communication IOSR Journal of Electronics and Communication Engineering (IOSR-JECE) e-issn: 2278-2834,p- ISSN: 2278-8735.Volume 11, Issue 3, Ver. I (May-Jun.2016), PP 33-37 www.iosrjournals.org Performance Analysis

More information

PERFORMANCE EVALUATION OF MIMO-OFDM IMPLEMENTATION ON WIRELESS OPEN-ACCESS RESEARCH PLATFORM (WARP)

PERFORMANCE EVALUATION OF MIMO-OFDM IMPLEMENTATION ON WIRELESS OPEN-ACCESS RESEARCH PLATFORM (WARP) PERFORMANCE EVALUATION OF MIMO-OFDM IMPLEMENTATION ON WIRELESS OPEN-ACCESS RESEARCH PLATFORM (WARP) Titiek Suryani and Suwadi Department of Electrical Engineering, Institut Teknologi Sepuluh Nopember (ITS),

More information

Wireless Medium Access Control and CDMA-based Communication Lesson 16 Orthogonal Frequency Division Medium Access (OFDM)

Wireless Medium Access Control and CDMA-based Communication Lesson 16 Orthogonal Frequency Division Medium Access (OFDM) Wireless Medium Access Control and CDMA-based Communication Lesson 16 Orthogonal Frequency Division Medium Access (OFDM) 1 4G File transfer at 10 Mbps High resolution 1024 1920 pixel hi-vision picture

More information

Contents. Introduction 1 1 Suggested Reading 2 2 Equipment and Software Tools 2 3 Experiment 2

Contents. Introduction 1 1 Suggested Reading 2 2 Equipment and Software Tools 2 3 Experiment 2 ECE363, Experiment 02, 2018 Communications Lab, University of Toronto Experiment 02: Noise Bruno Korst - bkf@comm.utoronto.ca Abstract This experiment will introduce you to some of the characteristics

More information

Modulation (7): Constellation Diagrams

Modulation (7): Constellation Diagrams Modulation (7): Constellation Diagrams Luiz DaSilva Professor of Telecommunications dasilval@tcd.ie +353-1-8963660 Adapted from material by Dr Nicola Marchetti Geometric representation of modulation signal

More information

Performance analysis of OFDM with QPSK using AWGN and Rayleigh Fading Channel

Performance analysis of OFDM with QPSK using AWGN and Rayleigh Fading Channel Performance analysis of OFDM with QPSK using AWGN and Rayleigh Fading Channel 1 V.R.Prakash* (A.P) Department of ECE Hindustan university Chennai 2 P.Kumaraguru**(A.P) Department of ECE Hindustan university

More information

Lecture 5: Simulation of OFDM communication systems

Lecture 5: Simulation of OFDM communication systems Lecture 5: Simulation of OFDM communication systems March 28 April 9 28 Yuping Zhao (Doctor of Science in technology) Professor, Peking University Beijing, China Yuping.zhao@pku.edu.cn Single carrier communcation

More information

Chapter 2 Overview - 1 -

Chapter 2 Overview - 1 - Chapter 2 Overview Part 1 (last week) Digital Transmission System Frequencies, Spectrum Allocation Radio Propagation and Radio Channels Part 2 (today) Modulation, Coding, Error Correction Part 3 (next

More information

Fundamentals of Digital Communication

Fundamentals of Digital Communication Fundamentals of Digital Communication Network Infrastructures A.A. 2017/18 Digital communication system Analog Digital Input Signal Analog/ Digital Low Pass Filter Sampler Quantizer Source Encoder Channel

More information

TSTE17 System Design, CDIO. General project hints. Behavioral Model. General project hints, cont. Lecture 5. Required documents Modulation, cont.

TSTE17 System Design, CDIO. General project hints. Behavioral Model. General project hints, cont. Lecture 5. Required documents Modulation, cont. TSTE17 System Design, CDIO Lecture 5 1 General project hints 2 Project hints and deadline suggestions Required documents Modulation, cont. Requirement specification Channel coding Design specification

More information

Performance Analysis of Ofdm Transceiver using Gmsk Modulation Technique

Performance Analysis of Ofdm Transceiver using Gmsk Modulation Technique Performance Analysis of Ofdm Transceiver using Gmsk Modulation Technique Gunjan Negi Student, ECE Department GRD Institute of Management and Technology Dehradun, India negigunjan10@gmail.com Anuj Saxena

More information

Optimized BPSK and QAM Techniques for OFDM Systems

Optimized BPSK and QAM Techniques for OFDM Systems I J C T A, 9(6), 2016, pp. 2759-2766 International Science Press ISSN: 0974-5572 Optimized BPSK and QAM Techniques for OFDM Systems Manikandan J.* and M. Manikandan** ABSTRACT A modulation is a process

More information

DESIGN, IMPLEMENTATION AND OPTIMISATION OF 4X4 MIMO-OFDM TRANSMITTER FOR

DESIGN, IMPLEMENTATION AND OPTIMISATION OF 4X4 MIMO-OFDM TRANSMITTER FOR DESIGN, IMPLEMENTATION AND OPTIMISATION OF 4X4 MIMO-OFDM TRANSMITTER FOR COMMUNICATION SYSTEMS Abstract M. Chethan Kumar, *Sanket Dessai Department of Computer Engineering, M.S. Ramaiah School of Advanced

More information

Doppler Frequency Effect on Network Throughput Using Transmit Diversity

Doppler Frequency Effect on Network Throughput Using Transmit Diversity International Journal of Sciences: Basic and Applied Research (IJSBAR) ISSN 2307-4531 (Print & Online) http://gssrr.org/index.php?journal=journalofbasicandapplied ---------------------------------------------------------------------------------------------------------------------------

More information

Principles of Communications ECS 332

Principles of Communications ECS 332 Principles of Communications ECS 332 Asst. Prof. Dr. Prapun Suksompong prapun@siit.tu.ac.th 5. Angle Modulation Office Hours: BKD, 6th floor of Sirindhralai building Wednesday 4:3-5:3 Friday 4:3-5:3 Example

More information

CHAPTER 4. DESIGN OF ADAPTIVE MODULATION SYSTEM BY USING 1/3 RATE TURBO CODER (SNR Vs BER)

CHAPTER 4. DESIGN OF ADAPTIVE MODULATION SYSTEM BY USING 1/3 RATE TURBO CODER (SNR Vs BER) 112 CHAPTER 4 DESIGN OF ADAPTIVE MODULATION SYSTEM BY USING 1/3 RATE TURBO CODER (SNR Vs BER) 4.1 NECESSITY FOR SYSTEM DESIGN The improved BER was achieved by inhibiting 1/3 rated Turbo coder instead of

More information

1/14. Signal. Surasak Sanguanpong Last updated: 11 July Signal 1/14

1/14. Signal. Surasak Sanguanpong  Last updated: 11 July Signal 1/14 1/14 Signal Surasak Sanguanpong nguan@ku.ac.th http://www.cpe.ku.ac.th/~nguan Last updated: 11 July 2000 Signal 1/14 Transmission structure 2/14 Transmitter/ Receiver Medium Amplifier/ Repeater Medium

More information

Volume 2, Issue 9, September 2014 International Journal of Advance Research in Computer Science and Management Studies

Volume 2, Issue 9, September 2014 International Journal of Advance Research in Computer Science and Management Studies Volume 2, Issue 9, September 2014 International Journal of Advance Research in Computer Science and Management Studies Research Article / Survey Paper / Case Study Available online at: www.ijarcsms.com

More information

PLC2 FPGA Days Software Defined Radio

PLC2 FPGA Days Software Defined Radio PLC2 FPGA Days 2011 - Software Defined Radio 17 May 2011 Welcome to this presentation of Software Defined Radio as seen from the FPGA engineer s perspective! As FPGA designers, we find SDR a very exciting

More information

DSRC using OFDM for roadside-vehicle communication systems

DSRC using OFDM for roadside-vehicle communication systems DSRC using OFDM for roadside-vehicle communication systems Akihiro Kamemura, Takashi Maehata SUMITOMO ELECTRIC INDUSTRIES, LTD. Phone: +81 6 6466 5644, Fax: +81 6 6462 4586 e-mail:kamemura@rrad.sei.co.jp,

More information

Wireless Communication: Concepts, Techniques, and Models. Hongwei Zhang

Wireless Communication: Concepts, Techniques, and Models. Hongwei Zhang Wireless Communication: Concepts, Techniques, and Models Hongwei Zhang http://www.cs.wayne.edu/~hzhang Outline Digital communication over radio channels Channel capacity MIMO: diversity and parallel channels

More information

Pilot-Assisted DFT Window Timing/ Frequency Offset Synchronization and Subcarrier Recovery 5.1 Introduction

Pilot-Assisted DFT Window Timing/ Frequency Offset Synchronization and Subcarrier Recovery 5.1 Introduction 5 Pilot-Assisted DFT Window Timing/ Frequency Offset Synchronization and Subcarrier Recovery 5.1 Introduction Synchronization, which is composed of estimation and control, is one of the most important

More information

Other Modulation Techniques - CAP, QAM, DMT

Other Modulation Techniques - CAP, QAM, DMT Other Modulation Techniques - CAP, QAM, DMT Prof. David Johns (johns@eecg.toronto.edu) (www.eecg.toronto.edu/~johns) slide 1 of 47 Complex Signals Concept useful for describing a pair of real signals Let

More information

Digital Modulation Schemes

Digital Modulation Schemes Digital Modulation Schemes 1. In binary data transmission DPSK is preferred to PSK because (a) a coherent carrier is not required to be generated at the receiver (b) for a given energy per bit, the probability

More information

Chapter 2 Channel Equalization

Chapter 2 Channel Equalization Chapter 2 Channel Equalization 2.1 Introduction In wireless communication systems signal experiences distortion due to fading [17]. As signal propagates, it follows multiple paths between transmitter and

More information

Improving Data Transmission Efficiency over Power Line Communication (PLC) System Using OFDM

Improving Data Transmission Efficiency over Power Line Communication (PLC) System Using OFDM Improving Data Transmission Efficiency over Power Line Communication (PLC) System Using OFDM Charles U. Ndujiuba 1, Samuel N. John 1, Oladimeji Ogunseye 2 1 Electrical & Information Engineering, Covenant

More information

EXAMINATION FOR THE DEGREE OF B.E. Semester 1 June COMMUNICATIONS IV (ELEC ENG 4035)

EXAMINATION FOR THE DEGREE OF B.E. Semester 1 June COMMUNICATIONS IV (ELEC ENG 4035) EXAMINATION FOR THE DEGREE OF B.E. Semester 1 June 2007 101902 COMMUNICATIONS IV (ELEC ENG 4035) Official Reading Time: Writing Time: Total Duration: 10 mins 120 mins 130 mins Instructions: This is a closed

More information

Fourier Transform Time Interleaving in OFDM Modulation

Fourier Transform Time Interleaving in OFDM Modulation 2006 IEEE Ninth International Symposium on Spread Spectrum Techniques and Applications Fourier Transform Time Interleaving in OFDM Modulation Guido Stolfi and Luiz A. Baccalá Escola Politécnica - University

More information

WAVELET OFDM WAVELET OFDM

WAVELET OFDM WAVELET OFDM EE678 WAVELETS APPLICATION ASSIGNMENT WAVELET OFDM GROUP MEMBERS RISHABH KASLIWAL rishkas@ee.iitb.ac.in 02D07001 NACHIKET KALE nachiket@ee.iitb.ac.in 02D07002 PIYUSH NAHAR nahar@ee.iitb.ac.in 02D07007

More information

ORTHOGONAL frequency division multiplexing

ORTHOGONAL frequency division multiplexing IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 47, NO. 3, MARCH 1999 365 Analysis of New and Existing Methods of Reducing Intercarrier Interference Due to Carrier Frequency Offset in OFDM Jean Armstrong Abstract

More information

Channel Estimation in Wireless OFDM Systems

Channel Estimation in Wireless OFDM Systems Estimation in Wireless OFDM Systems Govind Patidar M. Tech. Scholar, Electronics & Communication Engineering Mandsaur Institute of Technology Mandsaur,India gp.patidar10@gmail.com Abstract Orthogonal frequency

More information

Experiment # 4. Frequency Modulation

Experiment # 4. Frequency Modulation ECE 416 Fall 2002 Experiment # 4 Frequency Modulation 1 Purpose In Experiment # 3, a modulator and demodulator for AM were designed and built. In this experiment, another widely used modulation technique

More information

Signals 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) 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 information

Multipath can be described in two domains: time and frequency

Multipath can be described in two domains: time and frequency Multipath can be described in two domains: and frequency Time domain: Impulse response Impulse response Frequency domain: Frequency response f Sinusoidal signal as input Frequency response Sinusoidal signal

More information

xdsl Modulation Techniques

xdsl 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 information

NAVAL POSTGRADUATE SCHOOL THESIS

NAVAL POSTGRADUATE SCHOOL THESIS NAVAL POSTGRADUATE SCHOOL MONTEREY, CALIFORNIA THESIS SIGNAL DETECTION AND FRAME SYNCHRONIZATION OF MULTIPLE WIRELESS NETWORKING WAVEFORMS by Keith C. Howland September 2007 Thesis Advisor: Co-Advisor:

More information

Digital modulation techniques

Digital modulation techniques Outline Introduction Signal, random variable, random process and spectra Analog modulation Analog to digital conversion Digital transmission through baseband channels Signal space representation Optimal

More information

OFDM (Orthogonal Frequency Division Multiplexing) SIMULATION USING MATLAB Neha Pathak MTech Scholar, Shri am Institute of Technology

OFDM (Orthogonal Frequency Division Multiplexing) SIMULATION USING MATLAB Neha Pathak MTech Scholar, Shri am Institute of Technology OFDM (Orthogonal Frequency Division Multiplexing) SIMULATION USING MATLAB Neha Pathak MTech Scholar, Shri am Institute of Technology ABSTRACT This paper discusses the design and implementation of an OFDM

More information