Multi-Edge type Unequal Error Protection LDPC codes

TL;DR

This paper introduces a multi-edge type analysis method to optimize the connection profiles of LDPC codes, enhancing unequal error protection capabilities and maintaining performance differences across classes even after many decoding iterations.

Contribution

It presents a novel multi-edge type analysis approach for designing UEP-LDPC codes with adjustable performance differences and sustained protection levels.

Findings

Optimized connection profiles improve UEP performance.

UEP capability remains stable over many decoding iterations.

Performance differences between classes can be finely tuned.

Abstract

Irregular low-density parity check (LDPC) codes are particularly well-suited for transmission schemes that require unequal error protection (UEP) of the transmitted data due to the different connection degrees of its variable nodes. However, this UEP capability is strongly dependent on the connection profile among the protection classes. This paper applies a multi-edge type analysis of LDPC codes for optimizing such connection profile according to the performance requirements of each protection class. This allows the construction of UEP-LDPC codes where the difference between the performance of the protection classes can be adjusted and with an UEP capability that does not vanish as the number of decoding iterations grows.