Erasure Correcting Ldpc Codes for Channels with Packet Losses
نویسنده
چکیده
In this paper we design low-density parity-check (LDPC) codes for erasure channels with packet losses. Binary base matrices with good minimum stopping set size are designed and superposition is used with these matrices to construct LDPC codes which can correct losses of whole packets. By using superposition, rather than by using the more traditional codeword interleaving, LDPC codes are produced which are much more robust for packet loss channels also corrupted by random erasures.
منابع مشابه
Burst Correction Coding From Low-Density Parity-Check Codes
BURST CORRECTION CODING FROM LOW-DENSITY PARITY-CHECK CODES Wai Han Fong, PhD George Mason University, 2015 Dissertation Director: Dr. Shih-Chun Chang Dissertation Co-Director: Dr. Shu Lin This thesis explores techniques and theoretical bounds on efficiently encodable low-density parity-check (LDPC) codes for correcting single and multiple bursts of erasures and/or errors. The approach is to co...
متن کاملDigital Fountain Codes System Model and Performance over AWGN and Rayleigh Fading Channels
Digital fountain codes were originally packet-level forward erasure codes, but researchers have found that they are good at correcting bit errors. Modern LDPC and turbo codes have been shown to approach the Shannon limit. However, they are fixed rate codes and cannot well satisfy the Internet services that may encounter variable loss rates or asynchronous data access. For both packet and bit le...
متن کاملPrecoded EWF codes for unequal error protection of scalable video
Rateless codes are forward error correcting (FEC) codes of linear encoding-decoding complexity and asymptotically capacity-approaching performance over erasure channels with any erasure statistics. They have been recently recognized as a simple and efficient solution for packetized video transmission over networks with packet erasures. However, to adapt the error correcting capabilities of rate...
متن کاملSpatially-Coupled LDPC Codes for Transmission over Nonergodic Channels: Recent Advances
This paper resumes our recent advances in the analysis and design of Spatially-Coupled LDPC (SC-LDPC) codes, used for transmission over nonergodic channels, in particular over the block-fading channel and over the block erasure channel. It has been shown that: a) SC-LDPC codes are naturally suitable for nonergodic channel transmission and are robust to packet errors/erasures; b) it is possible ...
متن کاملOn the erasure-correcting capabilities of low-complexity decoded LDPC codes with constituent Hamming codes
Low-density parity-check (LDPC) codes can be constructed using constituent block codes other than single parity-check (SPC) codes. This paper considers random LDPC codes with constituent Hamming codes and investigates their asymptotic performance over the binary erasure channel. It is shown that there exist Hamming code-based LDPC codes which, when decoded with a low-complexity iterative algori...
متن کامل