Efficient Termination of Spatially-Coupled Codes

TL;DR

This paper introduces modified spatially-coupled LDPC codes that achieve higher coding rates and efficient termination using an accumulator, maintaining threshold performance while reducing rate-loss.

Contribution

The paper proposes a new class of spatially-coupled codes with improved rate and efficient termination via an accumulator, enhancing practical implementation.

Findings

Higher coding rate due to reduced rate-loss

Maintains threshold performance of original codes

Enables efficient termination with an accumulator

Abstract

Spatially-coupled low-density parity-check codes attract much attention due to their capacity-achieving performance and a memory-efficient sliding-window decoding algorithm. On the other hand, the encoder needs to solve large linear equations to terminate the encoding process. In this paper, we propose modified spatially-coupled codes. The modified $(\dl,\dr,L)$ codes have less rate-loss, i.e., higher coding rate, and have the same threshold as $(\dl,\dr,L)$ codes and are efficiently terminable by using an accumulator.