'Convolutional codes' presentation slideshows

Multimedie- och kommunikationssystem, lektion 6

Multimedie- och kommunikationssystem, lektion 6 . Kap 6: Fort. digital transmission. Felhantering. Note :. In a single-bit error, only one bit in the data unit has changed. 10.1 Single-bit error. Note :. A burst error means that 2 or more bits in the data unit have changed.

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T325: Technologies for digital media

1.02k views • 84 slides

CIS 6930 Powerline Communications Error Handling

(c) 2013 Richard Newman. CIS 6930 Powerline Communications Error Handling. Error Handling - Outline. Analysis Forward Error Correction Copy codes Block codes Convolutional codes Scrambling Concatenated codes Turbo-codes Low Density Parity Check (LDPC) Backward Error Correction (BEC)

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Convolutional codes

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Convolutional codes

612 views • 35 slides

Digital Communications I: Modulation and Coding Course

Spring - 2015 Jeffrey N. Denenberg Lecture 8a: Channel Encoding Part 3. Digital Communications I: Modulation and Coding Course. Last time, we talked about:. How decoding is performed for Convolutional codes? What is a Maximum likelihood decoder? What are soft decisions and hard decisions?

400 views • 29 slides

A Survey of Advanced FEC Systems

A Survey of Advanced FEC Systems. Eric Jacobsen Minister of Algorithms, Intel Labs Communication Technology Laboratory/ Radio Communications Laboratory July 29, 2004. With a lot of material from Bo Xia, CTL/RCL. Outline. What is Forward Error Correction?

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296.3:Algorithms in the Real World

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296.3:Algorithms in the Real World

362 views • 26 slides

Multimedia Streaming Over WiMax Networks

Technical Report. Multimedia Streaming Over WiMax Networks. Multimedia Streaming Over WiMax Networks. Introduction Protocol Layering Multimedia Features Quality of Service ( QoS ) Existing Works Enhanced MBS Conclusion. Introduction. WiMax

406 views • 24 slides

ECED 4504 Digital Transmission Theory

ECED 4504 Digital Transmission Theory. Jacek Ilow (based on the slides by Matthew Valenti) Reed Solomon Codes Convolutional Codes. Reed Solomon Codes. Reed Solomon codes are a generalization of BCH codes. Nonbinary BCH codes. The symbols are M-ary symbols instead of bits.

393 views • 21 slides

A Location-aided Energy-aware Routing Method for UWB Sensor Networks

A Location-aided Energy-aware Routing Method for UWB Sensor Networks. Xizhi An and Kyungsup Kwak Graduate School of Information Technology and Telecommunications, Inha University, Korea Mykonos, Greece, June 2006. Outline. Introduction System Model Routing Scheme Design

377 views • 20 slides

Convolutional Codes

Convolutional Codes. Basic Definitions. k =1, n = 2 , (2,1) Rate-1/2 convolutional code Two-stage register ( M=2 ) Each input bit influences the output for 3 intervals (K=3) K = constraint length of the code = M + 1. Generator Polynomial.

647 views • 18 slides

Team Return to Dust: Error Correction Codes

Team Return to Dust: Error Correction Codes. April 29, 2011. Matt Fillette Edward Huang Anand Kumar Joshi John Krier Fahad Mirza. Presentation Overview. Project Description System Architecture Implementation of Solutions Convolutional Codes Bose-Chaudhuri-Hocquenhem (BCH) Codes

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Digital Image Watermarking

Digital Image Watermarking. Er-Hsien Fu EE381K-15280 Student Presentation. Overview. Introduction Background Watermark Properties Embedding Detection The Project Introduction Embedding Detection Conclusions. Introduction .

1.77k views • 17 slides

(Chapter 14): Trellis based decoding of linear block codes

(Chapter 14): Trellis based decoding of linear block codes. Previous discussion on trellis based decoding of convolutional codes applies directly to any code with a (moderately complex) trellis Viterbi SOVA BCJR MAP Log-MAP Max-log-MAP etc.

389 views • 17 slides

LDPC vs. Convolutional Codes for 802.11n Applications: Performance Comparison

LDPC vs. Convolutional Codes for 802.11n Applications: Performance Comparison. January 2004 Aleksandar Purkovic, Nina Burns, Sergey Sukobok, Levent Demirekler Nortel Networks (contact: apurkovi@nortelnetworks.com). Outline. Background Simulation Methodology Simulation Results

1.06k views • 12 slides

Log-Likelihood Algebra

? = - L (d). L (d). +. L (d). 0 = 0. +. Log-Likelihood Algebra. ?Sum of two LLRs L(d 1 ) + L(d 2 ) ? L ( d 1 ? d 2 ) = log exp[L(d 1 )] + exp [L(d 2 )] 1 + exp[L(d 1 )].exp [L(d 2 )]

197 views • 11 slides

Forward Error Correction

Forward Error Correction . FEC Basic Idea. Send redundant data Receiver uses it to detect/correct errors Reduces retransmissions/ NAKs Useful when RTT is high. Types of FEC . Two types of FEC Block codes (works on blocks/packets) Hamming codes, Reed-Solomon codes

721 views • 10 slides

ECE 380: Wireless Communications Benefits of Coding and Diversity

ECE 380: Wireless Communications Benefits of Coding and Diversity. Michael L. Honig Department of ECE Northwestern University. May 2005. Probability of Error. Probability of Error with Fading. Power Spectral Density for GMSK. Outage Probability with Diversity. Prob{SNR < x (in dB)}.

322 views • 10 slides