Continuous Phase Modulation With 1-Bit Quantization and Oversampling Using Iterative Detection and Decoding

TL;DR

This paper introduces a novel iterative detection and decoding method for continuous phase modulation with 1-bit oversampled quantization, achieving improved bit error rates by tailored coding strategies.

Contribution

It proposes a new coding scheme and detection method specifically designed for continuous phase modulation with 1-bit ADC and oversampling, enhancing achievable rates and error performance.

Findings

Higher-order modulations improve achievable rate with oversampling

Two bits can be reliably detected at high SNR using the proposed mapping

The method achieves lower BER compared to conventional coding

Abstract

A channel with continuous phase modulation and 1-bit ADC with oversampling is considered. Due to oversampling, higher-order modulations yield a higher achievable rate and this work presents a method to approach this with sophisticated coding. A tailored bit mapping is proposed where two bits can be detected reliably at high SNR and only the third bit suffers from an error floor. With this, a convolutional code is only applied to the third bit. Our experiments with a turbo receiver show that the proposed method corresponds to a lower BER in comparison to the case of conventional channel coding.