Overview and Performance Analysis of Various Waveforms in High Mobility Scenarios

TL;DR

This paper reviews and compares various waveforms for high-mobility wireless systems, analyzing their performance, complexity, and compatibility to identify suitable candidates for next-generation communication scenarios.

Contribution

It provides a unified framework for classifying and comparing emerging waveforms in high-mobility environments, including BER performance and system compatibility analysis.

Findings

Waveform performance varies significantly in high-mobility channels.

A unified classification framework aids in systematic comparison.

Candidate waveforms are recommended based on performance and complexity.

Abstract

In the high-mobility scenarios of next-generation wireless communication systems (beyond 5G/6G), the performance of orthogonal frequency division multiplexing (OFDM) deteriorates drastically due to the loss of orthogonality between the subcarriers caused by large Doppler frequency shifts. Various emerging waveforms have been proposed for fast time-varying channels with excellent results. In this paper, we classify these waveforms from the perspective of their modulation domain and establish a unified framework to provide a comprehensive system structure comparison. Then we analyze bit error rate (BER) performance of each waveform in doubly selective channels. Through the discussions on their complexity and compatibility with OFDM systems, we finally give the candidate waveform suggestions.