面向远距离目标感知通信一体化的OFDM信号波形设计  

OFDM Waveform Design for the Integrated Sensing and Communication of Long-Distance Targets

作　　者：宋佳[1] 赵艺帆 昌硕 黄赛[1] SONG Jia;ZHAO Yifan;CHANG Shuo;HUANG Sai(BUPT,Beijing 100876,China;Beijing ByteDance Technology Co.,Ltd.,Beijing 100191,China)

机构地区：[1]北京邮电大学,北京100876 [2]北京字节跳动网络技术有限公司,北京100191

出　　处：《移动通信》2022年第4期14-21,共8页Mobile Communications

基　　金：国家重点研发计划“多系统复杂动态环境的频谱深度认知方法与技术”(2020YFB1807602)。

摘　　要：车对车(V2V)通信中,通信性能和感知性能是两个重要的性能指标,合适的波形设计能够提高感知的精度和通信的效率。通过对远距离V2V场景进行感知通信一体化波形设计,提出基于正交频分复用(OFDM)信号的脉冲分组索引导频调制(PIMP-OFDM)波形设计方案。该方案在发射端利用发送数据控制OFDM时频结构中的导频嵌入位置,接收端对导频矩阵进行脉冲压缩重构,并对重构后的导频矩阵进行二维傅里叶变换,实现对目标速度和距离的测量。仿真结果表明,PIMP-OFDM方案减少了雷达探测图中虚警目标峰值的个数和幅度,这样既减少了目标运动对目标距离感知带来的影响,又能够利用导频位置的随机性多传输一部分数据比特,从而提升通信效率和感知精度。Communication performance and sensing performance are two important indicators in vehicle-to-vehicle (V2V) communication.Appropriate waveform design can improve sensing accuracy and communication efficiency.The paper aims at the waveform design for integrated sensing and communication in long-distance V2V scenarios and proposes an OFDM-based pulsed packet index pilot modulation (PIMP-OFDM) waveform design scheme.In proposed scheme,the transmitter utilizes transmitting data to control the pilot embedding position in the OFDM time-frequency structure,and the receiver compresses and reconstructs the pilot matrix and performs two-dimensional Fourier transform on the reconstructed pilot matrix to measure the target speed and distance.Simulation results show that the PIMP-OFDM scheme can reduce the number and amplitude of false target peaks in the radar detection map and reduce the impact of targets’ movement on target range measurement.It can also transmit more data bits via utilizing the randomness of pilot positions,which improves communication efficiency and sensing accuracy.

关 键 词：OFDM 感知通信一体化 PIMP-OFDM V2V 

分 类 号：TN929.5[电子电信—通信与信息系统]