新的互补序列在雷达通信一体化中的应用

doi:10.12305/j.issn.1001-506X.2021.03.12

摘要/Abstract

摘要：

雷达通信一体化能有效整合系统射频资源, 可利用射频前端同时实现目标探测和通信。针对一体化中存在的随机通信数据引起的高距离旁瓣及严重的回波遮掩性问题, 提出了一种基于离散傅里叶矩阵循环扩展的互补码构造方法, 设计了一种新的基于完全互补码的雷达通信一体化方案, 该方案采用扩频多载波信号形式。理论分析和仿真结果表明, 所提出的信号设计方式能够获得低距离旁瓣, 有效地解决近距离探测的问题, 又可以满足通信多用户传输的需求, 符合基于信号共享的雷达通信一体化设计要求。

关键词: 多功能综合射频系统, 雷达通信一体化, 信号共享, 正交频分复用, 扩频技术

Abstract:

The integration of radar and communication can effectively integrate the radio frequency (RF) resources of the system and realize target detection and communication by using RF front-end simultaneously. In allusion to the high range sidelobe caused by random communication data and the overlapped echoes of short range, a new expansion method by series-wound discrete Fourter transform (DFT) matrix is proposed. A novel scheme of integrated radar and communication based on complete complementary codes is designed. The scheme adopts the spread spectrum multi-carrier signal framework. Theoretical analysis and simulation results show that, the design can implement the detection of short range targets and achieve low-level range sidelobe, and satisfy the requirement of multi-user transmission and radcom based signal-sharing.

Key words: multi-functional integrated radio frequency system, intergation of radar and communication, signal-sharing, orthogonal frequency division multiplexing (OFDM), spreading spectrum technology

中图分类号:

TN955

李晓柏, 杨瑞娟, 程伟, 罗菁. 新的互补序列在雷达通信一体化中的应用[J]. 系统工程与电子技术, 2021, 43(3): 693-699.

Xiaobai LI, Ruijuan YANG, Wei CHENG, Jing LUO. Application of a novel complementary signal to integrated radar and communication[J]. Systems Engineering and Electronics, 2021, 43(3): 693-699.

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遮挡情况	分段脉压数据的截取起始时间	匹配滤波函数	脉压后距离段拼接/km
4t_b≤T_c≤8t_b	4t_b	取后4个码元进行匹配滤波	6~12
8t_b≤T_c≤16t_b	8t_b	取后8个码元进行匹配滤波	12~24
16t_b≤T_c≤32t_b	16t_b	取后16个码元进行匹配滤波	24~48
T_c≤32t_b	32t_b	取整个32码元进行匹配滤波	≥48

仿真参数	取值
调制方式	BPSK
通信多径数目	4
Oppermann序列	码长为33的32组序列
互补码序列族	(8, 4, 32)
子载波数目	32
仿真个数	10⁶

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