1 Wideband DS-CDMA for Next-Generation Mobile Communications Systems Reporter : Vincent Chen Advisor : Prof. Li-Chun Wang 2000/8/13 Reference:IEEE Communication.

Slides:

Advertisements

Similar presentations

Forward Traffic Channels At the end of this section, the following objectives will have been accomplished: Understand what Forward Traffic Channels are.

Advertisements

Overview of the Third Generation Mobile Communications.

Multiuser Detection for CDMA Systems

Introduction to Digital Communications

Final Year Project Presentation FYP 08 Arsalan Tariq Mir Saad Najeeb Syed Ammar Faheem.

S Digital Communication Systems Multipath Radio Channel Addendum (extracts from J-P Linnartz: Wireless Communication CDROM)

WCDMA Design using Simulink

a By Yasir Ateeq. Table of Contents INTRODUCTION TASKS OF TRANSMITTER PACKET FORMAT PREAMBLE SCRAMBLER CONVOLUTIONAL ENCODER PUNCTURER INTERLEAVER.

Modern Digital and Analog Communication Systems Lathi Copyright © 2009 by Oxford University Press, Inc. C H A P T E R 15 ERROR CORRECTING CODES.

Digital transmission over a fading channel Narrowband system (introduction) Wideband TDMA (introduction) Wideband DS-CDMA (introduction) Rake receiver.

Interference Cancellation Algorithm with Pilot in 3GPP/LTE

1 A Comparison Study of 3G System Proposals: cdma2000 vs. WCDMA Emre A. Yavuz and Dr. Victor C. M. Leung University of British Colombia Vancouver, BC.

ECE 4371, Fall, 2013 Introduction to Telecommunication Engineering/Telecommunication Laboratory Zhu Han Department of Electrical and Computer Engineering.

IERG 4100 Wireless Communications

EE360: Lecture 8 Outline Multiuser Detection

Overview.  UMTS (Universal Mobile Telecommunication System) the third generation mobile communication systems.

1 cdma2000 Radio Access Network Salih Ergut 7/7/2003.

APPLICATION OF SPACE-TIME CODING TECHNIQUES IN THIRD GENERATION SYSTEMS - A. G. BURR ADAPTIVE SPACE-TIME SIGNAL PROCESSING AND CODING – A. G. BURR.

3G CDMA - WCDMA and cdma2000 Rodger E. Ziemer IEEE Communications Society Distinguished Lecturer Program.

10 January,2002Seminar of Master Thesis1 Helsinki University of Technology Department of Electrical and Communication Engineering WCDMA Simulator with.

Frequencies (or time slots or codes) are reused at spatially-separated locations  exploit power falloff with distance. Best efficiency obtained with minimum.

3/ EN/LZU Rev A WCDMA Air Interface Part 3: 1 of 22 WCDMA Air Interface Training Part 3 CDMA Capacity Considerations.

CDMA Technologies for Cellular Phone System, Dec. 22, CDMA Technologies for Cellular Phone System.

For 3-G Systems Tara Larzelere EE 497A Semester Project.

CDMA Key Technology ZTE Corporation CDMA Division.

CDMA Technologies for Cellular Phone System Week 16 Lecture 1.

HUSEYIN ARSLAN Electrical Engineering EE-6593 Course Outline Lecture-2: Basics of wireless –Important terminology and definitions (wireless, mobile, cellular,

West Virginia University

Digital transmission over a fading channel Narrowband system (introduction) Wideband TDMA (introduction) Wideband DS-CDMA (introduction) Rake receiver.

Multiuser Detection (MUD) Combined with array signal processing in current wireless communication environments Wed. 박사 3학기 구 정 회.

網路多媒體研究所 1 WCDMA Technology Past, Present and Future Part II: CDMA Technology Overview.

1 University of Canberra Advanced Communications Topics Television Broadcasting into the Digital Era by: Neil Pickford Lecture 5 DTTB Transmission Error.

Teachers Name : Suman Sarker Telecommunication Technology Subject Name : Mobile & Wireless Communication-2 Subject Code : 9471 Semester :7th Department.

Adaptation Techniques in Wireless Packet Data Services Speaker: Chih-Wei Wang Advisor: Li-Chun Wang.

Direct Sequence Spread Spectrum vs

TI DSPS FEST 1999 Implementation of Channel Estimation and Multiuser Detection Algorithms for W-CDMA on Digital Signal Processors Sridhar Rajagopal Gang.

教育部網路通訊人才培育先導型計畫 Wireless Communication Technologies 1 Outline Introduction Pseudo-Noise Sequences Direct-sequence Spread Spectrum

Iterative Multi-user Detection for STBC DS-CDMA Systems in Rayleigh Fading Channels Derrick B. Mashwama And Emmanuel O. Bejide.

EE578 Assignment #5 Abdul-Aziz.M Al-Yami November 8 th 2010.

WIDEBAND CODE DIVISION MULTIPLE ACCESS & THE CAPACITY IN CODE DIVISION MULTIPLE ACCESS Presented by Maheshwarnath Behary Assisted by Vishwanee Raghoonundun.

Example Wireless Networks: WaveLAN, Bluetooth Y. Richard Yang 01/26/2004.

CDMA Code Division Multiple Access. is a channel access method

Coded Modulation for Multiple Antennas over Fading Channels

CDMA TECHNOLOGY DEFINITION OF CDMA TECHNOLOGY A coding scheme, used as a modulation technique, in which multiple channels are independently coded for.

Packet service in UMTS: delay- throughput performance of the downlink shared channel Flaminio Borgonovo, Antonio Capone, Matteo Cesana, Luigi Fratta.

VIRGINIA POLYTECHNIC INSTITUTE & STATE UNIVERSITY MOBILE & PORTABLE RADIO RESEARCH GROUP MPRG Combined Multiuser Detection and Channel Decoding with Receiver.

VIRGINIA POLYTECHNIC INSTITUTE & STATE UNIVERSITY MOBILE & PORTABLE RADIO RESEARCH GROUP MPRG Combined Multiuser Reception and Channel Decoding for TDMA.

Principles of Digital Modulation. Principles of Digital Modulation: Outline of Lectures l Introduction to digital modulation - Why do I need to know how.

CDMA xEV-DO Overview Version The evolution to CDMA2000 1xEV-DO.

Space Time Codes. 2 Attenuation in Wireless Channels Path loss: Signals attenuate due to distance Shadowing loss : absorption of radio waves by scattering.

CDMA Reception Issues Unequal received power levels degrade SSMA performance Near-Far Ratio, terrain, RF obstacles, “Turn-the-Corner” effects, ... Multipath.

1 Orthogonal Frequency- Division Multiplexing (OFDM) Used in DSL, WLAN, DAB, WIMAX, 4G.

3: Diversity Fundamentals of Wireless Communication, Tse&Viswanath 1 3. Diversity.

An ARQ Technique Using Related Parallel and Serial Concatenated Convolutional Codes Yufei Wu formerly with: Mobile and Portable Radio Research Group Virginia.

Minufiya University Faculty of Electronic Engineering Dep. of Electronic and Communication Eng. 4’th Year Information Theory and Coding Lecture on: Performance.

WCDMA AND WLAN FOR 3G AND BEYOND 通訊所研二楊川民.

Stallings, Wireless Communications & Networks, Second Edition, © 2005 Pearson Education, Inc. All rights reserved Multiple Access Techniques.

Turbo Codes. 2 A Need for Better Codes Designing a channel code is always a tradeoff between energy efficiency and bandwidth efficiency. Lower rate Codes.

EC 2401*** WIRELESS COMMUNICATION. Why Wireless Benefits – Mobility: Ability to communicate anywhere!! – Easier configuration, set up and lower installation.

Multiple Access Techniques for Wireless Communication

Adaptive Usage of Main Resources in MIMO-Cognitive Radio Networks Shalva Kvirkvelia (PHD student) Prof. Teimuraz Kortua Prof. Jemal Beridze.

Implementation of Turbo Code in TI TMS320C8x Hao Chen Instructor: Prof. Yu Hen Hu ECE734 Spring 2004.

A Bandwidth Efficient Pilot Symbol Technique for Coherent Detection of Turbo Codes over Fading Channels Matthew C. Valenti Dept. of Comp. Sci. & Elect.

Channel Coding and Error Control 1. Outline Introduction Linear Block Codes Cyclic Codes Cyclic Redundancy Check (CRC) Convolutional Codes Turbo Codes.

1 Wireless Networks Lecture 19 cdmaOne/IS-95 Dr. Ghalib A. Shah.

Outline Introduction Type of Multiplexing FDMA TDMA CDMA Future Work

Digital transmission over a fading channel

Klaus Witrisal Signal Processing and Speech Communication Lab

Lecture 22 WCDMA (Part II) Dr. Ghalib A. Shah

Digital Communication Chapter 1: Introduction

Presentation transcript:

1 Wideband DS-CDMA for Next-Generation Mobile Communications Systems Reporter : Vincent Chen Advisor : Prof. Li-Chun Wang 2000/8/13 Reference:IEEE Communication Magazine,1998.9

2 Introduction: Second-Generation cellular system: Adopted digital technology Limited basic service Low-bit-rate Third-Generation cellular system: ITU:IMT-2000,2Mb/s Wideband DS-CDMA FDD,Air interface standard

3 The difference between IS95 and WDS-CDMA IS95: Base on narrowband DS-CDMA Optimized for basic service The difference between second and third generation Isolated cell case Sectored cell: Overcome the interference program

4 Content: The important concepts: Intercell asynchronous operation Pilot channel associated with individual data channels 1:Coherent Detection 2:Interference Cancellation 3:Adaptive antenna array (can be viewed as Adaptive cell sectorization) W-CDMA Technology

5 The technical features: Fast transmit power control Coherent spreading code tracking Coherent rake receiver Orthogonal multispreading factor forward link Variable-rate transmission with blind rate detection Field experiment

6 Enhanced Radio Transmission Techniques Multi-Stage Interference Canceller An Adaptive Antenna Array Combined with A Rake Receiver Matched Filter Rake Receiver Turbo Codes

7 Design Concept: W-CDMA Technology Channel Coding Modulate 10ms Data Add Header QPSK Spread 2GHZ MF Rake Combiner Viterbi Decoder 10ms Data Transmiter Receiver Subtract Header

8

9

10 Fast Cell Search Under Intercell Asynchronous Operation Cell search algorithm: 1: Detect scramble mask timing of best cell (least sum of propagation path loss plus shadowing) 2: Identify the scramble code group 3: Search for the scramble code

11

12 Fast TPC

13 Coherent spreading code tracking

14 Coherent Rake Combining

15

16

17

18 Orthogonal multi-spreading factor forward link

19 Variable-rate transmission with blind rate detection Discontinuous:Keep same Symbol rate Continuous:Keep same Chip rate Cyclic Redundancy Check Decoding Data rata=MSpreading code=01 Data rata=M/2 Spreading code=0011

20 Field experiment System set-up for 32kb/s data transmission

21 Measurement course characterization

22 The effect of spreading bandwidth

23

24 High-speed(1.92 Mb/s) data transmission

25

26 Enhanced Radio Transmission Techniques Multi-Stage Interference Canceller COMSIC: COherent Multi-Stage IC CEIGU:Channel Estimation-and-Interference Generation Unit

27

28

29 An Adaptive antenna array combined with a Rake receiver CAAAR Receiver: Coherent Adaptive Antenna Array Rake Receiver

30

31 Matched Filter Rake Receiver

32 Turbo Codes The main difference between Turbo codes and Conventional code Concatenating two or more recursive systematic codes Using a pseudo-random interleaver Iterative decoding algorithm

33 RSC:Recursive system convolutional encoder

34