Importance of Symbol Equity in Coded Modulation for Power Line Communications

TL;DR

This paper extends coded modulation schemes for power line communications by introducing equitable symbol weight codes, which are optimized for combating permanent narrowband noise.

Contribution

It generalizes permutation code-based modulation to broader code classes and introduces a new parameter for better noise performance assessment.

Findings

Equitable symbol weight codes are optimal for narrowband noise.

The new parameter improves code performance evaluation.

Extension of permutation codes to general codes enhances robustness.

Abstract

The use of multiple frequency shift keying modulation with permutation codes addresses the problem of permanent narrowband noise disturbance in a power line communications system. In this paper, we extend this coded modulation scheme based on permutation codes to general codes and introduce an additional new parameter that more precisely captures a code's performance against permanent narrowband noise. As a result, we define a new class of codes, namely, equitable symbol weight codes, which are optimal with respect to this measure.