Trellis-coded modulation with bit interleaving and iterative decoding

TLDR

The paper investigates bit‑interleaved coded modulation for bandwidth‑efficient software‑radio transmission and proposes a simple iterative decoding method with hard‑decision feedback to improve performance. The proposed iterative decoding framework supports coded modulation over diverse fading channels and enables efficient combination of punctured convolutional codes with multiphase/level modulation for variable‑rate transmission. Convolutional codes with strong Hamming distance provide high diversity order and large free Euclidean distance in BICM‑ID, and the scheme allows efficient variable‑rate transmission via punctured codes and multiphase/level modulation.

Abstract

This paper considers bit-interleaved coded modulation (BICM) for bandwidth-efficient transmission using software radios. A simple iterative decoding (ID) method with hard-decision feedback is suggested to achieve better performance. The paper shows that convolutional codes with good Hamming-distance property can provide both high diversity order and large free Euclidean distance for BICM-ID. The method offers a common framework for coded modulation over channels with a variety of fading statistics. In addition, BICM-ID allows an efficient combination of punctured convolutional codes and multiphase/level modulation, and therefore provides a simple mechanism for variable-rate transmission.