摘要
为了提升目标检测性能,解决多目标和多用户之间的自干扰和互干扰问题,基于串行时分互补码−码分多址(CC-CDMA)技术提出一种雷达通信一体化系统。首先,借用码分复用机理在发射端通过广义普洛黑−修−莫尔斯(GPTM)序列调整互补码中不同子序列对不同时间片上信号的扩频顺序,生成雷达通信一体化信号。其次,雷达接收端通过2次处理,利用逐点最小化方法将处理结果进行融合,提升雷达子系统的目标检测能力。最后,在通信接收端使用对应发射端扩频顺序的子序列对接收到的信号进行解扩,通过交织编码和汉明编码进一步降低误码率。仿真结果表明,与其他雷达通信一体化系统相比,所提系统具有更低的误码率、更高的多普勒分辨率和更好的旁瓣抑制性能。
In order to improve the performance of target detection and solve the problem of self-interference and mutual interference between multiple targets and multiple users,a radar communication integration system based on serial time division CC-CDMA was proposed.Firstly,the code division multiplexing mechanism was used to adjust the spread spectrum sequence of different subcodes in the complementary code to the signals on different time slices at the transmitter through the generalized PTM sequence to generate the integrated signal of radar communication.Secondly,the receiving end of the radar processed the data twice,and the point-by-point minimization method was used to fuse the processing results to improve the target detection capability of the radar subsystem.Lastly,at the receiving end of communication,the subcodes corresponding to the spread spectrum sequence at the transmitting end were used to de-amplify the received signals,and the bit error ratio was further reduced by interleaved coding and Hamming coding.Simulation results show that compared with other radar communication integration systems,the proposed system has lower bit error rate,higher Doppler resolution and better side lobe suppression performance.
作者
李玉博
崔健
冯俊超
陈晓玉
LI Yubo;CUI Jian;FENG Junchao;CHEN Xiaoyu(School of Information Science and Engineering,Yanshan University,Qinhuangdao 066000,China;Hebei Key Laboratory of Information Transmission and Signal Processing,Qinhuangdao 066000,China)
出处
《通信学报》
EI
CSCD
北大核心
2023年第9期127-138,共12页
Journal on Communications
基金
国家自然科学基金资助项目(No.62241110)
河北省高等学校科学研究重点基金资助项目(No.ZD2021105)
河北省重点实验室基金资助项目(No.202250701010046)
河北省自然科学基金资助项目(No.F2021203078)。
