短基线收发分置频域协同波形设计方法  

Frequency Domain Cooperative Waveform Design Method for Short Baseline Transceiver

作　　者：余显祥 路晴辉 杨婧 沙明辉 崔国龙 孔令讲 YU Xianxiang;LU Qinghui;YANG Jing;SHA Minghui;CUI Guolong;KONG Lingjiang(School of Information and Communication Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China;Beijing Institute of Radio Measurement,Beijing 100854,China)

机构地区：[1]电子科技大学信息与通信工程学院,成都611731 [2]北京无线电测量研究所,北京100854

出　　处：《雷达学报（中英文）》2022年第2期227-239,共13页Journal of Radars

基　　金：国家自然科学基金(U19B2017,62101097);长江学者奖励计划,中国博士后科学基金(2020M680147,2021T140096)。

摘　　要：多节点收发分置系统通过波形在空时频能等多域进行协同工作,能够提供相比单雷达更多的抗干扰自由度。该文针对抗多主瓣干扰问题,提出一种基于两部短基线收发分置系统的频域协同波形设计方法。首先,利用基于MM原理的近端乘子法(MM-PMM)算法,优化设计具有局部良好自相关电平的窄带探测信号;接着,依据窄带探测信号脉间频率跳变特点,优化对应的宽带频谱置零信号,作为窄带信号的掩护信号;然后,利用两个发射节点分别将窄带与宽带信号进行协同发射;最后,利用基于频率捷变的相参和非相参联合积累的信号处理方法实现对频域协同波形回波的处理。数值仿真实验验证了频域协同波形设计方法算法收敛性、频域掩护原理以及抗多主瓣干扰的有效性。Multinode transceiver division systems can cooperate across multiple domains,including space,time,frequency,and energy,through waveforms.Moreover,it can provide greater anti-interference degrees of freedom than that from a single radar.Through this paper,we propose a frequency domain cooperative waveform design method based on two short baseline transceiver separation systems to resist multi-mainlobe interference.First,a narrowband detection signal with a locally good autocorrelation level was optimized using the Majorization-Minimization-based Proximal Method of Multipliers(MM-PMM)algorithm.Then,according to the characteristics of the frequency hopping of the narrowband detection signal,the corresponding wideband signal with a null spectrum was optimized as the cover signal of a narrowband signal.Further,two transmitting nodes were used to transmit the narrowband and wideband signals.Finally,a signal processing method based on phase-coherent and nonphase-coherent joint accumulation,with known frequency agility was used to process the cooperative waveform in the frequency domain.Numerical simulation results demonstrated the convergence of the MM-PMM algorithm,principle of frequency domain cover,and effectiveness of the frequency domain cooperative waveform design method against multi-mainlobe interference.

关 键 词：短基线 频域协同波形 抗干扰 低截获概率 相参与非相参联合积累 

分 类 号：TN958[电子电信—信号与信息处理]