Zero Crossing Modulation for Communication with Temporally Oversampled 1-Bit Quantization

TL;DR

This paper explores zero crossing modulation for high-speed communication systems using 1-bit oversampled ADCs, focusing on modulation design, synchronization, and parameter estimation to address power efficiency challenges.

Contribution

It introduces zero crossing modulation tailored for 1-bit oversampled systems, including methods for sequence mapping, demapping, and channel estimation, and compares it with continuous phase modulation.

Findings

Zero crossing modulation enables efficient data transmission with 1-bit oversampling.

The paper demonstrates achievable rates and effective synchronization techniques.

Continuous phase modulation offers a viable alternative for zero crossing schemes.

Abstract

Today's communication systems typically use high resolution analog-to-digital converters (ADCs). However, considering future communication systems with data rates in the order of 100Gbit/s the ADC power consumption becomes a major factor due to the high sampling rates. A promising alternative are receivers based on 1-bit quantization and oversampling w.r.t. the signal bandwidth. Such an approach requires a redesign of modulation, receiver synchronization, and demapping. A zero crossing modulation is a natural choice as the information needs to be carried in the zero crossing time instants. The present paper provides an overview on zero crossing modulation, achievable rates, sequence mapping and demapping, 1-bit based channel parameter estimation, and continuous phase modulation as an alternative zero crossing modulation scheme.