移动通信2024，Vol.48Issue(3)：66-74,9.DOI:10.3969/j.issn.1006-1010.20240117-0001
频率多普勒分复用通信感知一体化波形
Frequency Doppler Division Multiplexing:An Integrated Sensing and Communication Waveform
摘要
Abstract
The 6G mobile communication system aims to achieve full spectrum access,sharing the frequency bands used by radar systems to conserve spectral resources and minimize inter-system interference.The deep integration of communication and sensing is crucial,with integrated communication-sensing waveforms emerging as a key technology.OFDM and OTFS are considered prime candidates for such integration.However,OFDM's inadequate performance in handling time-selective fading limits its applicability in future high-mobility scenarios,whereas OTFS,despite its excellent performance in this regard,is hampered by high complexity.This paper introduces a FDDM integrated communication-sensing waveform,employing frequency-Doppler domain symbols for modulation at the transmitter,and utilizing Doppler maximum ratio combining for demodulation at the communication receiver.For sensing,the paper combines periodogram analysis and channel estimation techniques for independent estimation of target distance and velocity.Thanks to the Doppler diversity gain,FDDM achieves similar communication performance to OTFS in high-speed mobile scenarios,and the complexity is lower than OTFS.In terms of sensing performance,FDDM is similar to OTFS and slightly better than OFDM.关键词
6G/高移动性场景/通信感知一体化/波形设计/频率多普勒分复用Key words
6G/high mobility scenario/integrated sensing and communication/waveform design/frequency-Doppler division multiplexing分类
信息技术与安全科学引用本文复制引用
徐然,王兆祺,刘喜庆..频率多普勒分复用通信感知一体化波形[J].移动通信,2024,48(3):66-74,9.基金项目
国家自然科学基金面上项目"通信感知一体化空口关键技术研究"(62271085) （62271085）
