面向雷达通信频谱共享的一体化信号研究综述

Overview of Joint Waveforms for Radar-Communication Spectrum Sharing

随着全球信息化建设的深入推进,频谱资源稀缺问题日益凸显。军民之间、业务之间、国家之间等多方争夺无线频谱资源的态势已基本形成。其中,雷达与无线通信之间的频谱竞争最为激烈。在此背景下,面向雷达与通信共享频谱的一体化信号引起了学术界和工业界的广泛关注。本文剖析了雷达通信一体化信号研究历程及其走向多维调制的发展趋势,从理论上指明了传统一体化信号的局限性以及一体化多维信号的本质优势,从技术上拓展、挖掘和利用了新自由度,并设计了物理可实现的一体化多维信号方案,从仿真和试验上完成了典型场景的一体化多维信号性能测试。本文尝试为未来雷达通信一体化信号研究指明方向,更期望为我国今后应对频谱资源高度紧缺、频谱竞争异常激烈、用频需求飞速增长和频谱利用率低下等矛盾提供理论和技术积累。

With the deepening construction of global information society,the shortage of spectrum resources is becoming increasingly prominent.Spectrum competition among various countries,functionalities,and military&civilian applications has basically taken shape.Specifically,spectrum competition between radar and wireless communication is the most intense.Therefore,joint radar and communication waveforms for spectrum sharing has attracted special attentions.In this paper,the research history of the joint waveform,along with its trend towards multi-dimensional modulation,are thoughtfully reviewed and discussed.Then,limitations of traditional joint waveforms and essential advantages of multidimensional joint waveforms are analyzed theoretically.Moreover,new degrees of freedoms beyond conventional time and frequency domains are developed and mined.According to which,several physically feasible multi-dimensional joint waveforms are designed.Finally,performances of the multi-dimensional joint waveforms are validated by simulations and outfield experiments.This paper attempts to point out the research direction for future joint radar sensing and wireless communication waveforms.Even more important,this paper aims to provide theoretical and technical solutions for China to deal with spectrum utilization contradictions including the high shortage of spectrum resources,the extremely fierce spectrum competition,the rapid growth of spectrum demands,and the low efficiency of current spectrum utilization.