Embedded Coding Technique using Generalised Array Codes, Statistical Channel Evaluation and Nested Trellis Decoding

Abstract

Generally embedded coding techniques based on row and column array codes employ a combination of inner codes for error correction and outer codes for error detection. The outer codes involve the addition of further redundant bits. This reduces the overall code rate and hence the throughput of the system. Furthermore the decoding of these array codes is not maximum likelihood decoding. In this paper we propose a new embedded coding technique that employs generalised array codes but no outer codes. The decoding of these codes is maximum likelihood and is done in a nested fashion using a single trellis and the error detection is done by statistical channel evaluation technique that uses the trellis of the component codes embedded in the main block.

Indexing terms:

• Embedded codes
• GAC
• Statistical channel evaluation
• Nested trellis decoding

Additional information

Notes on contributors

K M S Soyjaudah

Sunjiv Soyjaudah received his BSc (Hons) degree in Physics from Queen Mary College, University of London in 1982, his MSc degree in Digital Electronics from King's College, University of London in 1991, and his PhD degree in Digital Communications from University of Mauritius in 1998. He is presently an Associate Professor and Head of the Electrical and Electronic Engineering Department in the University of Mauritius. His current interest includes source and channel coding, modulation, cryptography, voice and video through IP, as well as mobile communication. Dr. Soyjaudah is a Chartered Engineer, member of the IEE and member of the IEEE.