Binary CPMs with Improved Spectral Efficiency

TL;DR

This paper introduces new binary CPM schemes with a precoder that enhance spectral efficiency and performance by increasing Euclidean distance while controlling bandwidth expansion.

Contribution

It proposes a novel precoding approach combined with ternary CPM to improve spectral efficiency and performance over classical formats.

Findings

Outperforms classical binary and quaternary CPM formats in performance

Increases minimum Euclidean distance of signals

Limits bandwidth expansion with the new precoder

Abstract

We design new continuous phase modulation (CPM) formats which are based on the combination of a proper precoder with binary input and a ternary CPM. The proposed precoder constrains the signal phase evolution in order to increase the minimum Euclidean distance, and to limit the bandwidth expansion due to the use of a ternary CPM. The resulting schemes are highly spectrally efficient and outperform classical binary and quaternary formats in terms of coded and uncoded performance.