Mobility

Exploring Controllable Deterministic Bits for LDPC Iterative Decoding in WiMAX Networks

Download Now Free registration required

Executive Summary

Low-Density Parity-Check (LDPC) codes are playing an important role in modern wireless communication systems such as WiMAX due to their Shannon limit approaching error correction performance. To lower the decoding threshold of LDPC codes, this paper develops a novel multi-layer iterative decoding scheme using deterministic bits for multimedia communication systems. These deterministic bits serve as known information in the LDPC decoding process to reduce the redundancy during data transmission. Unlike the existing work, the authors' proposed scheme addresses the controllable deterministic bits, such as MPEG null packets, rather than the widely investigated protocol headers. Simulation results show that their proposed scheme can achieve considerable gain in WiMAX networks.

  • Format: PDF
  • Size: 329.04 KB