基于梳状导频的通导融合测距优化配置方法  

Optimal Configuration Methods of Comb-type Pilot Based Integrated Communication and Navigation Ranging

作　　者：苏静芳 苏佳[1] 易卿武 曾存良 杨志华 王婷 SU Jingfang;SU Jia;YI Qingwu;ZENG Cunliang;YANG Zhihua;WANG Ting(School of Information Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China;State Key Laboratory of Satellite Navigation System and Equipment Technology,Shijiazhuang 050081,China)

机构地区：[1]河北科技大学信息科学与工程学院,河北石家庄050018 [2]卫星导航装备与技术国家重点实验室,河北石家庄050081

出　　处：《无线电工程》2022年第3期492-498,共7页Radio Engineering

基　　金：河北省科技支撑计划(18210803D)。

摘　　要：针对已提出的正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)体制下的通导融合测距算法中存在的通信资源占用率高的问题,提出了基于梳状导频的通导融合测距优化配置方法,在原有的通导融合测距系统上,将测距导频信号分配给部分子载波进行测距信息传输,接收端采用时频域联合估计法进行测距仿真,并分析了测距精度和通信资源占用率问题。仿真表明,采用优化配置方法后,在信噪比为-5 dB时,测距精度可达到0.9 m,此时导频信号只占用了50%的通信载波,降低了通信资源占用率。Aiming atthe problem of the high occupancy rate of communication resources in the proposed Orthogonal Frequency Division Multiplexing(OFDM)system for the integrated communication and navigation integration ranging algorithm,a comb-type pilot of optimized configuration method for the integrated communication and navigation ranging is proposed.In the original integrated communication and navigation ranging system,the ranging pilot signals are allocated to some subcarriers for ranging information transmission,and the time-frequency domain joint estimation method is used for ranging simulation and the ranging accuracy and communication resource occupancy rate is analysed.The simulation shows that after the optimized configuration method is adopted,when the signal-to-noise ratio(SNR)is-5 dB,the ranging accuracy can reach 0.9 m.At this time,the pilot signal only occupies 50%communication carrier,which reduces occupation rate of communication resources.

关 键 词：通导融合 优化配置 正交频分复用 梳状测距导频 测距 

分 类 号：TN967.2[电子电信—信号与信息处理]