Digital Communications over Fading Channel s

Size: px
Start display at page:

Download "Digital Communications over Fading Channel s"

Transcription

1 over Fading Channel s Instructor: Prof. Dr. Noor M Khan Department of Electronic Engineering, Muhammad Ali Jinnah University, Islamabad Campus, Islamabad, PAKISTAN Ph: +9 (51) , Ext. 19 (Office), 186 (ARWiC Lab) Fax: +9 (51) Base Station Mobile Station over Fading Channels 1

2 Mobile Channel Parameters Time delay spread Coherence Bandwidth -> ISI Doppler Spread Coherence Time -> Unstable channel Flat fading Frequency selective fading Fast fading Slow fading over Fading Channels

3 Multi-path Propagation Multi-path smears or spreads out the signal delay spread Causes inter-symbol interference limits the maximum symbol rate Base Statio n Mobile Statio n Transmitted Symbol Received Symbol t over Fading Channels 3

4 Delay Spread Base Station Space Mobile Station Transmitted Symbol Received Symbol t Time 4

5 Intersymbol Interference Transmitted Symbol of Interest Received Symbol of Interest t Transmitted Symbols Received Symbols t 5

6 Average Delay Spread Average delay spread ) P (τ 1 P (τ ) Multi-path Profile (Discrete) τ τ a τ P (τ )τ = = a P (τ ) P (τ 0 ) P (τ ) P (τ ) t τ 0 = 0 τ τ 1 τ 6

7 RMS Delay Spread RMS delay spread (Discrete) στ σ τ = τ τ τ = a a τ = P(τ P(τ )τ ) 7

8 Measurements Type of Delay Spread τ d Environment (µs) Open area <0. Suburban area 0.5 Urban area 3 8

9 Coherence Bandwidth Coherence bandwidth B c is a range of frequencies over which the channel can be considered flat passes all spectral components with approximately equal gain and liner phase Bandwidth where the correlation function R T (ω) for signal envelopes is high Therefore two sinusoidal signals with frequencies that are farther apart than the coherence bandwidth will fade independently. 9

10 Coherence Bandwidth If R T (ω) > 0.9 If R T (ω) > 0.5 B C B C = 1 50σ τ An exact relationship between coherence bandwidth & delay spread does not exist = 1 5σ τ 10

11 Doppler Shift f c broadening from f c to (f c + f m ) f m = f c v c v v BS1 11

12 Doppler Spread & Coherence Time Describes the time varying nature of the channel in a local area Doppler Spread B D, is a measure of the spectral broadening caused by the time rate of change f c broadening from (f c - f m ) to (f c + f m ) If the base-band signal bandwidth is much greater than B D, the effects of Doppler spread are negligible at the receiver 1

13 Coherence Time Coherence Time is the time domain dual of Doppler spread Doppler spread and coherence time are inversely proportional T C = 1/f m Statistical measure of the time duration over which the channel impulse response is invariant 13

14 Coherence Time If the coherence time is defined as the time over which the correlation function is above 0.5, then 9 T C 16π fm Rule of thumb for modern digital communication defines TC as the geometric mean of the above two expressions for TC T C = 9 16π f m 14

15 Types of Small-Scale Fading 15

16 Flat Fading 1 If the mobile radio channel has a constant gain and linear phase over a bandwidth greater than the bandwidth of the transmitted signal - the received signal will undergo flat fading Please, observe that the fading is flat (or frequency selective) depending on the signal bandwidth relative to the channel coherence bandwidth. 16

17 Flat Fading BS << B C & T S >> σ τ 17

18 Frequency Selective Fading 1 If the mobile radio channel as a constant gain and linear phase over a coherence bandwidth, smaller than the bandwidth of the transmitted signal - the received signal will undergo frequency selective fading Again, the signal bandwidth is wider then the channel coherence bandwidth, causing one or more areas of attenuation of the signal within the signal bandwidth 18

19 Frequency Selective Fading BS > B C & T S < σ τ 19

20 Fast Fading The channel impulse response changes rapidly within the symbol duration - coherence time < symbol period T S > T c and B S < B D Channel specifies as a fast or slow fading channel does not specify whether the channel is flat fading or frequency selective fading 0

21 Slow Fading The channel impulse response changes at a rate much slower than the transmitted base-band signal. Doppler spread is much less than the bandwidth of the base-band signal T S << T c and B S >> B D Velocity of the MS and the base-band signaling determines whether a signal undergoes fast or slow fading 1

22 Fading in Short Large Doppler Spread Time-Selective Fading Large Delay Spread Frequency-Selective Fading Large Angle Spread Space-Selective Selective Fading over Fading Channels

23 Fading in Short Delay Spread Coherence Bandwidth Frequency separation at which two frequency components of Tx signal undergo independent attenuations Doppler Spread Coherence Time Time separation at which two time components of Tx signal undergo independent attenuations over Fading Channels 3

24 Bandwidth Fading (Continued) Flat in Time and Selective in Frequency Selective in both Time and Frequency B c Flat in Time and Frequency Flat in Frequency and Selective in Time T c Time 4

25 Doppler Spread (Continued) y Scattering Point f : carrier frequency Incoming multipath Line of Sight θ MS x v c: speed of light v: mobile speed θ: Angle of motion with incoming multipath BS 5

26 Doppler Spread (Continued) f d = f v cos c θ f : carrier frequency c: speed of light v: mobile speed θ: Angle of motion with incoming multipath 6

27 Doppler Spread (Continued) For the land mobile fading spectrum, The Auto-Correlation Function Doppler Fading Spectrum 7

28 Doppler Spread (Continued) h is the channel impulse response h has a complex normal distribution with zero mean h is Raleigh distributed Phase φ is uniformly distributed between 0 and π is Chi-square distributed 8

29 Rayleigh Fading 1 The received envelope (amplitude) of a flat fading signal is described as a Rayleigh distribution Square root sum r, of two quadrature Gaussian noise signals x I and y Q has a Rayleigh distribution (Papoulis65) r = + x I y Q p r r r) = exp ; (0 ) r σ σ ( 9

30 Rayleigh Fading 30

31 Rayleigh Fading PDF 31

32 Rayleigh Fading 3 r r p( r) = exp (0 ) r σ σ σ - rms value of the received voltage signal before envelope detection σ - time average power before envelope detection The probability that the received signal envelope does not exceed R is given by: P( R) R R = Pr( r R) = p( r) dr = 1 exp 0 σ 3

33 Rayleigh Fading 4 The median value of r is found by solving r 1 = median 0 r median p ( r ) dr = 1.77σ Mean and median differ by only 0.55dB 33

34 Ricean Fading 1 When there is a dominant stationary signal component At the output of an envelope detector - adding a DC component ot the random multi-path ( r r Ar σ p( r) = e I e 0 σ σ + A ) ; for ( A 0, r 0) 34

35 Ricean Fading A - pea amplitude of the dominant signal I 0 () - modified Bessel function of the first ind and zero order Described in terms of a Ricean factor, K K A ( db) = 10log σ ( db) 35

Muhammad Ali Jinnah University, Islamabad Campus, Pakistan. Fading Channel. Base Station

Muhammad Ali Jinnah University, Islamabad Campus, Pakistan. Fading Channel. Base Station Fading Lecturer: Assoc. Prof. Dr. Noor M Khan Department of Electronic Engineering, Muhammad Ali Jinnah University, Islamabad Campus, Islamabad, PAKISTAN Ph: +9 (51) 111-878787, Ext. 19 (Office), 186 (ARWiC

More information

Channel. Muhammad Ali Jinnah University, Islamabad Campus, Pakistan. Multi-Path Fading. Dr. Noor M Khan EE, MAJU

Channel. Muhammad Ali Jinnah University, Islamabad Campus, Pakistan. Multi-Path Fading. Dr. Noor M Khan EE, MAJU Instructor: Prof. Dr. Noor M. Khan Department of Electronic Engineering, Muhammad Ali Jinnah University, Islamabad Campus, Islamabad, PAKISTAN Ph: +9 (51) 111-878787, Ext. 19 (Office), 186 (Lab) Fax: +9

More information

Multi-Path Fading Channel

Multi-Path Fading Channel Instructor: Prof. Dr. Noor M. Khan Department of Electronic Engineering, Muhammad Ali Jinnah University, Islamabad Campus, Islamabad, PAKISTAN Ph: +9 (51) 111-878787, Ext. 19 (Office), 186 (Lab) Fax: +9

More information

Mobile Radio Propagation Channel Models

Mobile Radio Propagation Channel Models Wireless Information Transmission System Lab. Mobile Radio Propagation Channel Models Institute of Communications Engineering National Sun Yat-sen University Table of Contents Introduction Propagation

More information

Mobile Radio Propagation: Small-Scale Fading and Multi-path

Mobile Radio Propagation: Small-Scale Fading and Multi-path Mobile Radio Propagation: Small-Scale Fading and Multi-path 1 EE/TE 4365, UT Dallas 2 Small-scale Fading Small-scale fading, or simply fading describes the rapid fluctuation of the amplitude of a radio

More information

EENG473 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 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 information

WIRELESS COMMUNICATION TECHNOLOGIES (16:332:546) LECTURE 5 SMALL SCALE FADING

WIRELESS COMMUNICATION TECHNOLOGIES (16:332:546) LECTURE 5 SMALL SCALE FADING WIRELESS COMMUNICATION TECHNOLOGIES (16:332:546) LECTURE 5 SMALL SCALE FADING Instructor: Dr. Narayan Mandayam Slides: SabarishVivek Sarathy A QUICK RECAP Why is there poor signal reception in urban clutters?

More information

Wireless Channel Modeling (Modeling, Simulation, and Mitigation)

Wireless Channel Modeling (Modeling, Simulation, and Mitigation) Wireless Channel Modeling (Modeling, Simulation, and Mitigation) Dr. Syed Junaid Nawaz Assistant Proessor Department o Electrical Engineering COMSATS Institute o Inormation Technology Islamabad, Paistan.

More information

Wireless Channel Propagation Model Small-scale Fading

Wireless 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 information

ECE 476/ECE 501C/CS Wireless Communication Systems Winter Lecture 6: Fading

ECE 476/ECE 501C/CS Wireless Communication Systems Winter Lecture 6: Fading ECE 476/ECE 501C/CS 513 - Wireless Communication Systems Winter 2005 Lecture 6: Fading Last lecture: Large scale propagation properties of wireless systems - slowly varying properties that depend primarily

More information

ECE 476/ECE 501C/CS Wireless Communication Systems Winter Lecture 6: Fading

ECE 476/ECE 501C/CS Wireless Communication Systems Winter Lecture 6: Fading ECE 476/ECE 501C/CS 513 - Wireless Communication Systems Winter 2003 Lecture 6: Fading Last lecture: Large scale propagation properties of wireless systems - slowly varying properties that depend primarily

More information

ECE 476/ECE 501C/CS Wireless Communication Systems Winter Lecture 6: Fading

ECE 476/ECE 501C/CS Wireless Communication Systems Winter Lecture 6: Fading ECE 476/ECE 501C/CS 513 - Wireless Communication Systems Winter 2004 Lecture 6: Fading Last lecture: Large scale propagation properties of wireless systems - slowly varying properties that depend primarily

More information

Wireless Fading Channels

Wireless Fading Channels Wireless Fading Channels Dr. Syed Junaid Nawaz Assistant Professor Department of Electrical Engineering COMSATS Institute of Information Technology Islamabad, Paistan. Email: junaidnawaz@ieee.org Courtesy

More information

NETW 701: Wireless Communications. Lecture 5. Small Scale Fading

NETW 701: Wireless Communications. Lecture 5. Small Scale Fading NETW 701: Wireless Communications Lecture 5 Small Scale Fading Small Scale Fading Most mobile communication systems are used in and around center of population. The transmitting antenna or Base Station

More information

Mobile Radio Propagation Channel Models

Mobile Radio Propagation Channel Models Wireless Information Transmission System Lab. Mobile Radio Propagation Channel Models Institute of Communications Engineering National Sun Yat-sen University Table of Contents Introduction Propagation

More information

Small-Scale Fading I PROF. MICHAEL TSAI 2011/10/27

Small-Scale Fading I PROF. MICHAEL TSAI 2011/10/27 Small-Scale Fading I PROF. MICHAEL TSAI 011/10/7 Multipath Propagation RX just sums up all Multi Path Component (MPC). Multipath Channel Impulse Response An example of the time-varying discrete-time impulse

More information

Orthogonal Frequency Division Multiplexing (OFDM)

Orthogonal Frequency Division Multiplexing (OFDM) Orthogonal Frequency Division Multiplexing (OFDM) Presenter: Engr. Dr. Noor M. Khan Professor Department of Electrical Engineering, Muhammad Ali Jinnah University, Islamabad Campus, Islamabad, PAKISTAN

More information

Chapter 5 Small-Scale Fading and Multipath. School of Information Science and Engineering, SDU

Chapter 5 Small-Scale Fading and Multipath. School of Information Science and Engineering, SDU Chapter 5 Small-Scale Fading and Multipath School of Information Science and Engineering, SDU Outline Small-Scale Multipath Propagation Impulse Response Model of a Multipath Channel Small-Scale Multipath

More information

The Radio Channel. COS 463: Wireless Networks Lecture 14 Kyle Jamieson. [Parts adapted from I. Darwazeh, A. Goldsmith, T. Rappaport, P.

The Radio Channel. COS 463: Wireless Networks Lecture 14 Kyle Jamieson. [Parts adapted from I. Darwazeh, A. Goldsmith, T. Rappaport, P. The Radio Channel COS 463: Wireless Networks Lecture 14 Kyle Jamieson [Parts adapted from I. Darwazeh, A. Goldsmith, T. Rappaport, P. Steenkiste] Motivation The radio channel is what limits most radio

More information

CHAPTER 2 WIRELESS CHANNEL

CHAPTER 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 information

Narrow- and wideband channels

Narrow- and wideband channels RADIO SYSTEMS ETIN15 Lecture no: 3 Narrow- and wideband channels Ove Edfors, Department of Electrical and Information technology Ove.Edfors@eit.lth.se 2012-03-19 Ove Edfors - ETIN15 1 Contents Short review

More information

9.4 Temporal Channel Models

9.4 Temporal Channel Models ECEn 665: Antennas and Propagation for Wireless Communications 127 9.4 Temporal Channel Models The Rayleigh and Ricean fading models provide a statistical model for the variation of the power received

More information

Text Book. References. Andrea Goldsmith, Wireless Communications, Cambridge University Press Wireless Communications

Text Book. References. Andrea Goldsmith, Wireless Communications, Cambridge University Press Wireless Communications Ammar Abu-Hudrouss Islamic University Gaza ١ Course Syllabus Text Boo Andrea Goldsmith,, Cambridge University Press 005. References 1. Rappaport, : Principles and Practice, Prentice Hall nd Ed. D. N. C.

More information

Effects of Fading Channels on OFDM

Effects of Fading Channels on OFDM IOSR Journal of Engineering (IOSRJEN) e-issn: 2250-3021, p-issn: 2278-8719, Volume 2, Issue 9 (September 2012), PP 116-121 Effects of Fading Channels on OFDM Ahmed Alshammari, Saleh Albdran, and Dr. Mohammad

More information

TEMPUS PROJECT JEP Wideband Analysis of the Propagation Channel in Mobile Broadband System

TEMPUS PROJECT JEP Wideband Analysis of the Propagation Channel in Mobile Broadband System Department of Electrical Engineering and Computer Science TEMPUS PROJECT JEP 743-94 Wideband Analysis of the Propagation Channel in Mobile Broadband System Krzysztof Jacek Kurek Final report Supervisor:

More information

Chapter 3. Mobile Radio Propagation

Chapter 3. Mobile Radio Propagation Chapter 3 Mobile Radio Propagation Based on the slides of Dr. Dharma P. Agrawal, University of Cincinnati and Dr. Andrea Goldsmith, Stanford University Propagation Mechanisms Outline Radio Propagation

More information

Characterization of a Very Shallow Water Acoustic Communication Channel MTS/IEEE OCEANS 09 Biloxi, MS

Characterization of a Very Shallow Water Acoustic Communication Channel MTS/IEEE OCEANS 09 Biloxi, MS Characterization of a Very Shallow Water Acoustic Communication Channel MTS/IEEE OCEANS 09 Biloxi, MS Brian Borowski Stevens Institute of Technology Departments of Computer Science and Electrical and Computer

More information

Narrow- and wideband channels

Narrow- and wideband channels RADIO SYSTEMS ETIN15 Lecture no: 3 Narrow- and wideband channels Ove Edfors, Department of Electrical and Information technology Ove.Edfors@eit.lth.se 27 March 2017 1 Contents Short review NARROW-BAND

More information

Microwave Seminar. Noise and Bit Error Ratio. J. Richie. Spring 2013

Microwave Seminar. Noise and Bit Error Ratio. J. Richie. Spring 2013 Microwave Seminar Noise and Bit Error Ratio J. Richie Spring 2013 Outline Noise Noise and Equivalent Temperature Noise Figure Small Scale Fade and Multipath Impulse Response Model Types of Fading Modulation

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

SIMULATION MODELING OF STATISTICAL NAKAGAMI-m FADING CHANNELS MASTER OF ENGINEERING (M.E.) ELECTRONICS AND COMMUNICATION ENGINEERING MANNAM RAMA RAO

SIMULATION MODELING OF STATISTICAL NAKAGAMI-m FADING CHANNELS MASTER OF ENGINEERING (M.E.) ELECTRONICS AND COMMUNICATION ENGINEERING MANNAM RAMA RAO SIMULATION MODELING OF STATISTICAL NAKAGAMI-m FADING CHANNELS Thesis submitted in partial fulfillment of the requirement for the award of the degree of MASTER OF ENGINEERING (M.E.) In ELECTRONICS AND COMMUNICATION

More information

CALIFORNIA STATE UNIVERSITY, NORTHRIDGE FADING CHANNEL CHARACTERIZATION AND MODELING

CALIFORNIA STATE UNIVERSITY, NORTHRIDGE FADING CHANNEL CHARACTERIZATION AND MODELING CALIFORNIA STATE UNIVERSITY, NORTHRIDGE FADING CHANNEL CHARACTERIZATION AND MODELING A graduate project submitted in partial fulfillment of the requirements For the degree of Master of Science in Electrical

More information

Implementation of a MIMO Transceiver Using GNU Radio

Implementation of a MIMO Transceiver Using GNU Radio ECE 4901 Fall 2015 Implementation of a MIMO Transceiver Using GNU Radio Ethan Aebli (EE) Michael Williams (EE) Erica Wisniewski (CMPE/EE) The MITRE Corporation 202 Burlington Rd Bedford, MA 01730 Department

More information

Wireless Physical Layer Concepts: Part II

Wireless Physical Layer Concepts: Part II Wireless Physical Layer Concepts: Part II Raj Jain Professor of CSE Washington University in Saint Louis Saint Louis, MO 63130 Jain@cse.wustl.edu Audio/Video recordings of this lecture are available at:

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

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

UNIK4230: Mobile Communications Spring 2013

UNIK4230: Mobile Communications Spring 2013 UNIK4230: Mobile Communications Spring 2013 Abul Kaosher abul.kaosher@nsn.com Mobile: 99 27 10 19 1 UNIK4230: Mobile Communications Propagation characteristis of wireless channel Date: 07.02.2013 2 UNIK4230:

More information

Part 4. Communications over Wireless Channels

Part 4. Communications over Wireless Channels Part 4. Communications over Wireless Channels p. 1 Wireless Channels Performance of a wireless communication system is basically limited by the wireless channel wired channel: stationary and predicable

More information

Revision of Lecture One

Revision of Lecture One Revision of Lecture One System block Transceiver Wireless Channel Signal / System: Bandpass (Passband) Baseband Baseband complex envelope Linear system: complex (baseband) channel impulse response Channel:

More information

Small Scale Fading in Radio Propagation

Small Scale Fading in Radio Propagation Small Scale Fading in Radio Propagation 16:33:546 Wireless Communication Technologies Spring 005 Department of Electrical Engineering, Rutgers University, Piscataway, NJ 08904 Suhas Mathur (suhas@winlab.rutgers.edu)

More information

Wideband Channel Characterization. Spring 2017 ELE 492 FUNDAMENTALS OF WIRELESS COMMUNICATIONS 1

Wideband Channel Characterization. Spring 2017 ELE 492 FUNDAMENTALS OF WIRELESS COMMUNICATIONS 1 Wideband Channel Characterization Spring 2017 ELE 492 FUNDAMENTALS OF WIRELESS COMMUNICATIONS 1 Wideband Systems - ISI Previous chapter considered CW (carrier-only) or narrow-band signals which do NOT

More information

WIRELESS COMMUNICATIONS PRELIMINARIES

WIRELESS COMMUNICATIONS PRELIMINARIES WIRELESS COMMUNICATIONS Preliminaries Radio Environment Modulation Performance PRELIMINARIES db s and dbm s Frequency/Time Relationship Bandwidth, Symbol Rate, and Bit Rate 1 DECIBELS Relative signal strengths

More information

Mobile Communications

Mobile Communications Mobile Communications Wen-Shen Wuen Trans. Wireless Technology Laboratory National Chiao Tung University WS Wuen Mobile Communications 1 Outline Outline 1 Small-Scale Multipath Propagation 2 Impulse Response

More information

Lecture 1 Wireless Channel Models

Lecture 1 Wireless Channel Models MIMO Communication Systems Lecture 1 Wireless Channel Models Prof. Chun-Hung Liu Dept. of Electrical and Computer Engineering National Chiao Tung University Spring 2017 2017/3/2 Lecture 1: Wireless Channel

More information

Welcome to the next lecture on mobile radio propagation. (Refer Slide Time: 00:01:23 min)

Welcome to the next lecture on mobile radio propagation. (Refer Slide Time: 00:01:23 min) Wireless Communications Dr. Ranjan Bose Department of Electrical Engineering Indian Institute of Technology, Delhi Lecture No # 20 Mobile Radio Propagation -11- Multipath and Small Scale Fading Welcome

More information

Statistical multipath channel models

Statistical multipath channel models Statistical multipath channel models 1. ABSTRACT *) in this seminar we examine fading models for the constructive and destructive addition of different multipath component *) science deterministic channel

More information

Performance Evaluation Of Digital Modulation Techniques In Awgn Communication Channel

Performance Evaluation Of Digital Modulation Techniques In Awgn Communication Channel Performance Evaluation Of Digital Modulation Techniques In Awgn Communication Channel Oyetunji S. A 1 and Akinninranye A. A 2 1 Federal University of Technology Akure, Nigeria 2 MTN Nigeria Abstract The

More information

Revision of Lecture One

Revision of Lecture One Revision of Lecture One System blocks and basic concepts Multiple access, MIMO, space-time Transceiver Wireless Channel Signal/System: Bandpass (Passband) Baseband Baseband complex envelope Linear system:

More information

Channel Models. Spring 2017 ELE 492 FUNDAMENTALS OF WIRELESS COMMUNICATIONS 1

Channel Models. Spring 2017 ELE 492 FUNDAMENTALS OF WIRELESS COMMUNICATIONS 1 Channel Models Spring 2017 ELE 492 FUNDAMENTALS OF WIRELESS COMMUNICATIONS 1 Narrowband Channel Models Statistical Approach: Impulse response modeling: A narrowband channel can be represented by an impulse

More information

ECE5984 Orthogonal Frequency Division Multiplexing and Related Technologies Fall Mohamed Essam Khedr. Fading Channels

ECE5984 Orthogonal Frequency Division Multiplexing and Related Technologies Fall Mohamed Essam Khedr. Fading Channels ECE5984 Orthogonal Frequency Division Multiplexing and Related Technologies Fall 2007 Mohamed Essam Khedr Fading Channels Major Learning Objectives Upon successful completion of the course the student

More information

Wireless Communication Fundamentals Feb. 8, 2005

Wireless Communication Fundamentals Feb. 8, 2005 Wireless Communication Fundamentals Feb. 8, 005 Dr. Chengzhi Li 1 Suggested Reading Chapter Wireless Communications by T. S. Rappaport, 001 (version ) Rayleigh Fading Channels in Mobile Digital Communication

More information

Written Exam Channel Modeling for Wireless Communications - ETIN10

Written Exam Channel Modeling for Wireless Communications - ETIN10 Written Exam Channel Modeling for Wireless Communications - ETIN10 Department of Electrical and Information Technology Lund University 2017-03-13 2.00 PM - 7.00 PM A minimum of 30 out of 60 points are

More information

Fundamentals of Wireless Communication

Fundamentals of Wireless Communication Fundamentals of Wireless Communication David Tse University of California, Berkeley Pramod Viswanath University of Illinois, Urbana-Champaign Fundamentals of Wireless Communication, Tse&Viswanath 1. Introduction

More information

Channel Modelling for Beamforming in Cellular Systems

Channel Modelling for Beamforming in Cellular Systems Channel Modelling for Beamforming in Cellular Systems Salman Durrani Department of Engineering, The Australian National University, Canberra. Email: salman.durrani@anu.edu.au DERF June 26 Outline Introduction

More information

Mobile-to-Mobile Wireless Channels

Mobile-to-Mobile Wireless Channels Mobile-to-Mobile Wireless Channels Alenka Zajic ARTECH HOUSE BOSTON LONDON artechhouse.com Contents PREFACE xi ma Inroduction 1 1.1 Mobile-to-Mobile Communication Systems 2 1.1.1 Vehicle-to-Vehicle Communication

More information

MSIT 413: Wireless Technologies Week 3

MSIT 413: Wireless Technologies Week 3 MSIT 413: Wireless Technologies Week 3 Michael L. Honig Department of EECS Northwestern University January 2016 Why Study Radio Propagation? To determine coverage Can we use the same channels? Must determine

More information

Project = An Adventure : Wireless Networks. Lecture 4: More Physical Layer. What is an Antenna? Outline. Page 1

Project = An Adventure : Wireless Networks. Lecture 4: More Physical Layer. What is an Antenna? Outline. Page 1 Project = An Adventure 18-759: Wireless Networks Checkpoint 2 Checkpoint 1 Lecture 4: More Physical Layer You are here Done! Peter Steenkiste Departments of Computer Science and Electrical and Computer

More information

Performance of Orthogonal Frequency Division Multiplexing System Based on Mobile Velocity and Subcarrier

Performance of Orthogonal Frequency Division Multiplexing System Based on Mobile Velocity and Subcarrier Journal of Computer Science 6 (): 94-98, 00 ISSN 549-3636 00 Science Publications Performance of Orthogonal Frequency Division Multiplexing System ased on Mobile Velocity and Subcarrier Zulkeflee in halidin

More information

RECOMMENDATION ITU-R P The prediction of the time and the spatial profile for broadband land mobile services using UHF and SHF bands

RECOMMENDATION ITU-R P The prediction of the time and the spatial profile for broadband land mobile services using UHF and SHF bands Rec. ITU-R P.1816 1 RECOMMENDATION ITU-R P.1816 The prediction of the time and the spatial profile for broadband land mobile services using UHF and SHF bands (Question ITU-R 211/3) (2007) Scope The purpose

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

Two. Else there is danger of. Solitude. Channel models for digital transmission

Two. Else there is danger of. Solitude. Channel models for digital transmission Two. Else there is danger of. Solitude. Channel models for digital transmission 20 Chapter 2. Channel models for digital transmission 2.1 Time- and frequency-selectivity We work with baseband-equivalent

More information

Mobile Radio Systems Small-Scale Channel Modeling

Mobile Radio Systems Small-Scale Channel Modeling Mobile Radio Systems Small-Scale Channel Modeling Klaus Witrisal witrisal@tugraz.at Signal Processing and Speech Communication Laboratory www.spsc.tugraz.at Graz University of Technology October 28, 2015

More information

Analysis of Fast Fading in Wireless Communication Channels M.Siva Ganga Prasad 1, P.Siddaiah 1, L.Pratap Reddy 2, K.Lekha 1

Analysis of Fast Fading in Wireless Communication Channels M.Siva Ganga Prasad 1, P.Siddaiah 1, L.Pratap Reddy 2, K.Lekha 1 International Journal of ISSN 0974-2107 Systems and Technologies IJST Vol.3, No.1, pp 139-145 KLEF 2010 Fading in Wireless Communication Channels M.Siva Ganga Prasad 1, P.Siddaiah 1, L.Pratap Reddy 2,

More information

Modern radio techniques

Modern radio techniques Modern radio techniques for probing the ionosphere Receiver, radar, advanced ionospheric sounder, and related techniques Cesidio Bianchi INGV - Roma Italy Ionospheric properties related to radio waves

More information

CHAPTER 4 PERFORMANCE ANALYSIS OF THE ALAMOUTI STBC BASED DS-CDMA SYSTEM

CHAPTER 4 PERFORMANCE ANALYSIS OF THE ALAMOUTI STBC BASED DS-CDMA SYSTEM 89 CHAPTER 4 PERFORMANCE ANALYSIS OF THE ALAMOUTI STBC BASED DS-CDMA SYSTEM 4.1 INTRODUCTION This chapter investigates a technique, which uses antenna diversity to achieve full transmit diversity, using

More information

3TimeandFrequencySelective Radio Channel

3TimeandFrequencySelective Radio Channel 3TimeandFrequencySelective Radio Channel Small-scale fading, or simply fading, is used to describe the rapid fluctuation of the amplitude of the received radio signal over a short period of time or travel

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

UWB Channel Modeling

UWB Channel Modeling Channel Modeling ETIN10 Lecture no: 9 UWB Channel Modeling Fredrik Tufvesson & Johan Kåredal, Department of Electrical and Information Technology fredrik.tufvesson@eit.lth.se 2011-02-21 Fredrik Tufvesson

More information

ANALOGUE TRANSMISSION OVER FADING CHANNELS

ANALOGUE TRANSMISSION OVER FADING CHANNELS J.P. Linnartz EECS 290i handouts Spring 1993 ANALOGUE TRANSMISSION OVER FADING CHANNELS Amplitude modulation Various methods exist to transmit a baseband message m(t) using an RF carrier signal c(t) =

More information

Channel Modeling ETI 085

Channel Modeling ETI 085 Channel Modeling ETI 085 Overview Lecture no: 9 What is Ultra-Wideband (UWB)? Why do we need UWB channel models? UWB Channel Modeling UWB channel modeling Standardized UWB channel models Fredrik Tufvesson

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

Multipath Path. Direct Path

Multipath Path. Direct Path Chapter Fading Channels. Channel Models In this chapter we examine models of fading channels and the performance of coding and modulation for fading channels. Fading occurs due to multiple paths between

More information

Performance Study of OFDM Over Fading Channels for Wireless Communications

Performance Study of OFDM Over Fading Channels for Wireless Communications University of Denver Digital Commons @ DU Electronic Theses and Dissertations Graduate Studies 1-1-2012 Performance Study of OFDM Over Fading Channels for Wireless Communications Ahmed Alshammari University

More information

Multiple Access Techniques

Multiple Access Techniques Multiple Access Techniques Instructor: Prof. Dr. Noor M. Khan Department of Electrical Engineering, Faculty of Engineering, Mohammad Ali Jinnah University, Islamabad Campus, Islamabad, PAKISTAN Ph: +92

More information

Application Note 37. Emulating RF Channel Characteristics

Application Note 37. Emulating RF Channel Characteristics Application Note 37 Emulating RF Channel Characteristics Wireless communication is one of the most demanding applications for the telecommunications equipment designer. Typical signals at the receiver

More information

IEEE Working Group on Mobile Broadband Wireless Access <http://grouper.ieee.org/groups/802/mbwa>

IEEE Working Group on Mobile Broadband Wireless Access <http://grouper.ieee.org/groups/802/mbwa> 2003-01-10 IEEE C802.20-03/09 Project Title IEEE 802.20 Working Group on Mobile Broadband Wireless Access Channel Modeling Suitable for MBWA Date Submitted Source(s)

More information

Propagation Channels. Chapter Path Loss

Propagation Channels. Chapter Path Loss Chapter 9 Propagation Channels The transmit and receive antennas in the systems we have analyzed in earlier chapters have been in free space with no other objects present. In a practical communication

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

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

Use of Multiple-Antenna Technology in Modern Wireless Communication Systems

Use of Multiple-Antenna Technology in Modern Wireless Communication Systems Use of in Modern Wireless Communication Systems Presenter: Engr. Dr. Noor M. Khan Professor Department of Electrical Engineering, Muhammad Ali Jinnah University, Islamabad Campus, Islamabad, PAKISTAN Ph:

More information

Lecture 7/8: UWB Channel. Kommunikations

Lecture 7/8: UWB Channel. Kommunikations Lecture 7/8: UWB Channel Kommunikations Technik UWB Propagation Channel Radio Propagation Channel Model is important for Link level simulation (bit error ratios, block error ratios) Coverage evaluation

More information

Propagation Characteristics of a Mobile Radio Channel for Rural, Suburban and Urban Environments

Propagation Characteristics of a Mobile Radio Channel for Rural, Suburban and Urban Environments Propagation Characteristics of a Mobile Radio Channel for Rural, Suburban and Urban Environments Mr. ANIL KUMAR KODURI, Mr. VSRK. SHARMA 2, Mr. M. KHALEEL ULLAH KHAN 3, STUDENT, M.TECH 2,3 ASSOCIATE PROFESSOR

More information

Self-interference Handling in OFDM Based Wireless Communication Systems

Self-interference Handling in OFDM Based Wireless Communication Systems Self-interference Handling in OFDM Based Wireless Communication Systems Tevfik Yücek yucek@eng.usf.edu University of South Florida Department of Electrical Engineering Tampa, FL, USA (813) 974 759 Tevfik

More information

STUDY OF ENHANCEMENT OF SPECTRAL EFFICIENCY OF WIRELESS FADING CHANNEL USING MIMO TECHNIQUES

STUDY OF ENHANCEMENT OF SPECTRAL EFFICIENCY OF WIRELESS FADING CHANNEL USING MIMO TECHNIQUES STUDY OF ENHANCEMENT OF SPECTRAL EFFICIENCY OF WIRELESS FADING CHANNEL USING MIMO TECHNIQUES Jayanta Paul M.TECH, Electronics and Communication Engineering, Heritage Institute of Technology, (India) ABSTRACT

More information

Simulation of Outdoor Radio Channel

Simulation of Outdoor Radio Channel Simulation of Outdoor Radio Channel Peter Brída, Ján Dúha Department of Telecommunication, University of Žilina Univerzitná 815/1, 010 6 Žilina Email: brida@fel.utc.sk, duha@fel.utc.sk Abstract Wireless

More information

Testing c2k Mobile Stations Using a Digitally Generated Faded Signal

Testing c2k Mobile Stations Using a Digitally Generated Faded Signal Testing c2k Mobile Stations Using a Digitally Generated Faded Signal Agenda Overview of Presentation Fading Overview Mitigation Test Methods Agenda Fading Presentation Fading Overview Mitigation Test Methods

More information

Exam 3 is two weeks from today. Today s is the final lecture that will be included on the exam.

Exam 3 is two weeks from today. Today s is the final lecture that will be included on the exam. ECE 5325/6325: Wireless Communication Systems Lecture Notes, Spring 2010 Lecture 19 Today: (1) Diversity Exam 3 is two weeks from today. Today s is the final lecture that will be included on the exam.

More information

Unit 5 - Week 4 - Multipath Fading Environment

Unit 5 - Week 4 - Multipath Fading Environment 2/29/207 Introduction to ireless and Cellular Communications - - Unit 5 - eek 4 - Multipath Fading Environment X Courses Unit 5 - eek 4 - Multipath Fading Environment Course outline How to access the portal

More information

Empirical Path Loss Models

Empirical Path Loss Models Empirical Path Loss Models 1 Free space and direct plus reflected path loss 2 Hata model 3 Lee model 4 Other models 5 Examples Levis, Johnson, Teixeira (ESL/OSU) Radiowave Propagation August 17, 2018 1

More information

Multipath Propagation Model for High Altitude Platform (HAP) Based on Circular Straight Cone Geometry

Multipath Propagation Model for High Altitude Platform (HAP) Based on Circular Straight Cone Geometry Multipath Propagation Model for High Altitude Platform (HAP) Based on Circular Straight Cone Geometry J. L. Cuevas-Ruíz ITESM-CEM México D.F., México jose.cuevas@itesm.mx A. Aragón-Zavala ITESM-Qro Querétaro

More information

Wireless Communication Technologies Course No. 16:332:559 (Spring 2000) Lecture Lalitha Sankaranarayanan

Wireless Communication Technologies Course No. 16:332:559 (Spring 2000) Lecture Lalitha Sankaranarayanan Wireless Communication Technologies Course No. 6:33:559 (Spring 000) Lecture 0-6-00 Lalitha Sankaranarayanan lalitha@ustad.att.com PATH LOSS IN MACROCELLS: The theoretical model for path loss, L p, for

More information

Channel Modelling ETIM10. Channel models

Channel Modelling ETIM10. Channel models Channel Modelling ETIM10 Lecture no: 6 Channel models Fredrik Tufvesson Department of Electrical and Information Technology Lund University, Sweden Fredrik.Tufvesson@eit.lth.se 2012-02-03 Fredrik Tufvesson

More information

Level 6 Graduate Diploma in Engineering Wireless and mobile communications

Level 6 Graduate Diploma in Engineering Wireless and mobile communications 9210-119 Level 6 Graduate Diploma in Engineering Wireless and mobile communications Sample Paper You should have the following for this examination one answer book non-programmable calculator pen, pencil,

More information

Antennas and Propagation. Chapter 5

Antennas and Propagation. Chapter 5 Antennas and Propagation Chapter 5 Introduction An antenna is an electrical conductor or system of conductors Transmission - radiates electromagnetic energy into space Reception - collects electromagnetic

More information

Antennas & Propagation. CSG 250 Fall 2007 Rajmohan Rajaraman

Antennas & Propagation. CSG 250 Fall 2007 Rajmohan Rajaraman Antennas & Propagation CSG 250 Fall 2007 Rajmohan Rajaraman Introduction An antenna is an electrical conductor or system of conductors o Transmission - radiates electromagnetic energy into space o Reception

More information

RRC Vehicular Communications Part II Radio Channel Characterisation

RRC Vehicular Communications Part II Radio Channel Characterisation RRC Vehicular Communications Part II Radio Channel Characterisation Roberto Verdone Slides are provided as supporting tool, they are not a textbook! Outline 1. Fundamentals of Radio Propagation 2. Large

More information

Antennas and Propagation. Chapter 5

Antennas and Propagation. Chapter 5 Antennas and Propagation Chapter 5 Introduction An antenna is an electrical conductor or system of conductors Transmission - radiates electromagnetic energy into space Reception - collects electromagnetic

More information

Elham Torabi Supervisor: Dr. Robert Schober

Elham Torabi Supervisor: Dr. Robert Schober Low-Rate Ultra-Wideband Low-Power for Wireless Personal Communication Area Networks Channel Models and Signaling Schemes Department of Electrical & Computer Engineering The University of British Columbia

More information

EE5713 : Advanced Digital Communications

EE5713 : Advanced Digital Communications EE573 : Advanced Digital Communications Week 4, 5: Inter Symbol Interference (ISI) Nyquist Criteria for ISI Pulse Shaping and Raised-Cosine Filter Eye Pattern Error Performance Degradation (On Board) Demodulation

More information

Antennas and Propagation

Antennas and Propagation Mobile Networks Module D-1 Antennas and Propagation 1. Introduction 2. Propagation modes 3. Line-of-sight transmission 4. Fading Slides adapted from Stallings, Wireless Communications & Networks, Second

More information