Multiple Parallel Concatenated Gallager Codes: Code Design and Decoding Techniques

摘要

A novel technique to concatenate multiple component low density parity check (LDPC) codes in parallel is presented. Multiple Parallel Concatenated Gallager Codes leverage the advantage of breaking an equivalently long LDPC code into multiple small (lower-complexity) LDPC codes to offer scalability and scope for improving performance in practical implementation for delay-sensitive and resource-constrained applications. The construction as well as two proposed decoding techniques for MPCGCs is evaluated. It is shown that by optimizing the construction of the component LDPC codes and the number of decoding iterations at various channel conditions, the performance of MPCGCs can be significantly improved and their complexity reduced.