Turbo-synchronization. Friday, March 19 2004 Sébastien de la Kethulle de Ryhove – Turbo-synchronization Introduction Communication systems based on the.

Slides:



Advertisements
Similar presentations
Chapter 2: Digital Modulation
Advertisements

Iterative Equalization and Decoding
Feedback Reliability Calculation for an Iterative Block Decision Feedback Equalizer (IB-DFE) Gillian Huang, Andrew Nix and Simon Armour Centre for Communications.
Communication System Overview
Inserting Turbo Code Technology into the DVB Satellite Broadcasting System Matthew Valenti Assistant Professor West Virginia University Morgantown, WV.
The Impact of Channel Estimation Errors on Space-Time Block Codes Presentation for Virginia Tech Symposium on Wireless Personal Communications M. C. Valenti.
a By Yasir Ateeq. Table of Contents INTRODUCTION TASKS OF TRANSMITTER PACKET FORMAT PREAMBLE SCRAMBLER CONVOLUTIONAL ENCODER PUNCTURER INTERLEAVER.
TELIN Estimation and detection from coded signals Presented by Marc Moeneclaey, UGent - TELIN dept. Joint research : - UGent.
TELIN Estimation and detection from coded signals Presented by Marc Moeneclaey, UGent - TELIN dept. Joint research : - UGent.
Turbo Codes – Decoding and Applications Bob Wall EE 548.
Turbo Codes Azmat Ali Pasha.
Division of Engineering and Applied Sciences DIMACS-04 Iterative Timing Recovery Aleksandar Kavčić Division of Engineering and Applied Sciences Harvard.
Improving the Performance of Turbo Codes by Repetition and Puncturing Youhan Kim March 4, 2005.
1/26 Chapter 6 Digital Data Communication Techniques.
Doc.: IEEE /1399r0 Submission November 2014 Multi-Carrier Training Field for OFDM Transmission in aj (45GHz) Authors/contributors: Date:
Anthony Gaught Advisors: Dr. In Soo Ahn and Dr. Yufeng Lu Department of Electrical and Computer Engineering Bradley University, Peoria, Illinois May 7,
ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING(OFDM)
Institute for Experimental Mathematics Ellernstrasse Essen - Germany DATA COMMUNICATION 2-dimensional transmission A.J. Han Vinck May 1, 2003.
1 Cooperative STBC-OFDM Transmissions with Imperfect Synchronization in Time and Frequency Fan Ng and Xiaohua(Edward) Li Department of Electrical and Computer.
West Virginia University
EE345S Real-Time Digital Signal Processing Lab Fall 2006 Lecture 16 Quadrature Amplitude Modulation (QAM) Receiver Prof. Brian L. Evans Dept. of Electrical.
Contact: Robust Wireless Communication System for Maritime Monitoring Robust Wireless Communication System for Maritime Monitoring.
Integration of System Design and Standard Development in Digital Communication Education Xiaohua(Edward) Li State University of New York at Binghamton.
1 PERFORMANCE OF FREQUENCY OFFSET SYNCHRONIZATION IN A SINGLE AND MULTI-ANTENNA IEEE SYSTEM José A. Rivas Cantero M. Julia Fernández-Getino.
March 29, 2005Week 11 1 EE521 Analog and Digital Communications James K. Beard, Ph. D. Tuesday, March 29, 2005
Data and Computer Communications Chapter 6 – Digital Data Communications Techniques.
林宏穎: OFDM Introduction
Real-Time Signal-To-Noise Ratio Estimation Techniques for Use in Turbo Decoding Javier Schlömann and Dr. Noneaker.
1 A Novel Time and Frequency Synchronization Scheme for OFDM Systems Ching-Yu Wang Graduate Institute of Communication Engineering National Chi Nan University.
Name Iterative Source- and Channel Decoding Speaker: Inga Trusova Advisor: Joachim Hagenauer.
ITERATIVE CHANNEL ESTIMATION AND DECODING OF TURBO/CONVOLUTIONALLY CODED STBC-OFDM SYSTEMS Hakan Doğan 1, Hakan Ali Çırpan 1, Erdal Panayırcı 2 1 Istanbul.
CELLULAR COMMUNICATIONS MIDTERM REVIEW. Representing Oscillations   w is angular frequency    Need two variables to represent a state  Use a single.
Synchronization of Turbo Codes Based on Online Statistics
Modeling a Multicarrier Wireless Communication Transceiver Embedded Software Systems Literature Survey March 24,2004 By Hunaid Lotia.
A Simple Transmit Diversity Technique for Wireless Communications -M
VIRGINIA POLYTECHNIC INSTITUTE & STATE UNIVERSITY MOBILE & PORTABLE RADIO RESEARCH GROUP MPRG Performance of Turbo Codes in Interleaved Flat Fading Channels.
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.
PAPR Reduction Method for OFDM Systems without Side Information
FMT Modulation for Wireless Communication
Matthew Valenti West Virginia University
CRMA: Collision Resistant Multiple Access Lili Qiu University of Texas at Austin Joint work with Tianji Li, Mi Kyung Han, Apurv Bhartia, Eric Rozner, Yin.
The Adaptive Algorithm of Symbol Timing And Carrier Phase Estimation in OFDM Systems Jun Wu, Qun Zhou and K.K.M.Cheng Department of Electronic Engineering,
Frank Schreckenbach, Munich University of Technology NEWCOM 2005 Analysis and Design of Mappings for Iterative Decoding of Bit-Interleaved Coded Modulation*
DIGITAL COMMUNICATION. Introduction In a data communication system, the output of the data source is transmitted from one point to another. The rate of.
10/19/20051 Turbo-NFSK: Iterative Estimation, Noncoherent Demodulation, and Decoding for Fast Fading Channels Shi Cheng and Matthew C. Valenti West Virginia.
Introduction to OFDM and Cyclic prefix
Security Vulnerability and Countermeasures of Frequency Offset Correction in a Systems Hanif Rahbari, Marwan Krunz, and Loukas Lazos Department of.
Principios de Comunicaciones EL4005
OptiSystem applications: Digital modulation analysis (PSK)
Co-BCast: High-Rate WiFi Broadcasting in Crowded Scenarios via Lightweight Coordination of Multiple Access Points Hang Qiu, Konstantinos Psounis, Giuseppe.
Recent Advances in Iterative Parameter Estimation
Rate Mapping for SISO, AWGN channel
Coding for Noncoherent M-ary Modulation
Shi Cheng and Matthew C. Valenti Lane Dept. of CSEE
Coding and Interleaving
Chapter 6.
Field Measurements of 2x2 MIMO Communications
Mr. Ali Hussain Mugaibel
Phase turbo-synchronization scheme
Digital Communication Chapter 1: Introduction
Post equalizer SNR estimation
Direct Sequence Spread Spectrum Modulation and Demodulation using Compressive Sensing Under the guidance of M.Venugopala Rao Submitted by K.Y.K.Kumari.
Month Year doc.: IEEE yy/xxxxr0 January 2008
November 2018 Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [ w Fraunhofer IIS proposal performance.
20us effective preambles for MIMO-OFDM
Homework #2 Due May 29 , Consider a (2,1,4) convolutional code with g(1) = 1+ D2, g(2) = 1+ D + D2 + D3 a. Draw the.
Turbo-equalization for n/ac
HNS Proposal for n Physical Layer
20us effective preambles for MIMO-OFDM
III. Turbo Codes.
Presentation transcript:

Turbo-synchronization

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Introduction Communication systems based on the turbo principle Remarkable performances Ideal synchronization

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Transmission System

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization The Turbo Principle Compute soft information on the transmitted symbols using an iterative receiver

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Soft / Hard Information Hard approach Soft approach

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization The Turbo Principle Applicable to a wide variety of problems: –Decoding: Turbo-decoding –Decoding + equalization: Turbo-equalization –Decoding + demodulation: Turbo-demodulation –… Turbo detection

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Example: Turbo-demodulation Transmitter

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization NSC Encoder

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Grouping and Mapping

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Example: Turbo-demodulation Receiver – Exchange of soft information

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Synchronization Find estimates for –The carrier frequency –The carrier phase –The sampling time

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Synchronization Classical receiver

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Turbo-synchronization Soft receiver

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Soft Synchronization – Example Traditional DD synchronization Soft DD synchronization

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Algorithm: Soft Phase Synchronization Initialize /* many possibilities */ do { Correct the phase of the received sequence Perform one soft det./dec. iteration on the corrected sequence Find a new estimate for using the newly obtained soft information } while ( changes a lot) /* Continue with detection / decoding */

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization BER Performance Phase offset [degrees] BER BER Performance vs. Phase Offset for a Turbo Coded system

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Mean Estimated Phase Offset Phase offset [degrees] Mean Estimated Phase Offset [degrees]

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Estimator Variance Phase offset [degrees] Estimator Variance [degrees 2 ]

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization BER Performance Phase offset [degrees] BER

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Estimator Variance Phase offset = 30 degrees Estimator Variance [degrees 2 ] E b / N 0 [dB]

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Performances – Acquisition BER Preamble: 7 16-QAM symbols E b / N 0 [dB]

Friday, March Sébastien de la Kethulle de Ryhove – Turbo-synchronization Conclusions Performance enhancement –Synchronization algorithms –Overall system Encouraging results

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2024 SlidePlayer.com. Inc. All rights reserved.