Spectrally Efficient LDPC Codes For IRIG-106 Waveforms via Random Puncturing

TL;DR

This paper explores the use of random puncturing on LDPC codes within IRIG-106 waveforms to enhance spectral efficiency, demonstrating through simulations that decoding performance remains robust.

Contribution

It introduces a novel application of random puncturing to LDPC codes for IRIG-106 waveforms, improving spectrum efficiency without sacrificing decoding robustness.

Findings

Random puncturing improves spectrum efficiency.

LDPC codes maintain robust decoding performance.

Simulation results confirm effectiveness.

Abstract

Low-density parity-check (LDPC) codes form part of the IRIG-106 standard and have been successfully deployed for the Telemetry Group version of shaped-offset quadrature phase shift keying (SOQPSK-TG) modulation. Recently, LDPC code solutions have been proposed and optimized for continuous phase modulations (CPMs), including the pulse code modulation/frequency modulation (PCM/FM) and the multi-h CPM developed by the Advanced Range TeleMetry program (ARTM CPM). These codes were shown to perform around one dB from the respective channel capacities of these modulations. In this paper, we consider the effect of random puncturing of these LDPC codes to further improve spectrum efficiency. We present numerical simulation results that affirm the robust decoding performance promised by LDPC codes designed for ARTM CPM.