ScholarLens Back to search
2009•Unpublished venueRequires access

A comparative analysis of LDPC decoders for image transmission over AWGN channel

Sohaib A. Qazi, Muhammad Shoaib, Usman Javaid, Shahzad Asif

Open publisher page 1 citations

Abstract

In this paper we studied the performance of Low Density Parity Check (LDPC) codes over Additive White Gaussian Noise (AWGN) channel. Different images are transmitted for two different LDPC decoders. Parity check matrices are used for encoding and decoding processes. The basic technique used to decode the message is message passing algorithm. We have used the image of 256x256 for our experiments. Minimum error rate is achieved at a code rate of 0.5 and row weight of 4. Different images are recovered at 10 dB SNR with a probability of error close to Shannon limit.

About this research paper

What this paper is about

In this paper we studied the performance of Low Density Parity Check (LDPC) codes over Additive White Gaussian Noise (AWGN) channel. Different images are transmitted for two different LDPC decoders. Parity check matrices are used for encoding and decoding processes. The basic technique used to decode the message is message passing algorithm. We have used the image of 256x256 for our experiments. Minimum error rate is achieved at a code rate of 0.5 and row weight of 4. Different images are recovered at 10 dB SNR with a probability of error close to Shannon limit.

Why it matters

OpenAlex reports 1 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

In this paper we studied the performance of Low Density Parity Check (LDPC) codes over Additive White Gaussian Noise (AWGN) channel. Different images are transmitted for two different LDPC decoders. Parity check matrices are used for encoding and decoding processes. The basic technique used to decode the message is message passing algorithm. We have used the image of 256x256 for our experiments. Minimum error rate is achieved at a code rate of 0.5 and row weight of 4. Different images are recovered at 10 dB SNR with a probability of error close to Shannon limit.

Key concepts: Low-density parity-check code, Additive white Gaussian noise, Decoding methods, Algorithm, Computer science, Channel (broadcasting), Word error rate, Transmission (telecommunications)

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
A comparative analysis of LDPC decoders for image transmission over AWGN channel — Research Paper | ScholarLens