线性调频-伪码调相脉冲压缩信号仿真分析  

Simulation Analysis of LFM-pseudo-code phase-modulated pulse compression signal

作　　者：蔡永俊 张红波 Cai Yongjun;Zhang Hongbo(AVIC Leihua Electronic Technology Research Institute,Wuxi Jiangsu 214063,China)

机构地区：[1]中国航空工业集团公司雷华电子技术研究所,江苏无锡214063

出　　处：《长江信息通信》2021年第5期42-46,共5页Changjiang Information & Communications

摘　　要：雷达低截获设计中,发射信号的设计是非常关键的,要想获得较低的被截获概率,必须选取复杂的雷达发射波形。相位编码使得非合作方接收机对伪随机序列编码的信号极难进行匹配滤波处理,有效降低了被截获的概率,但对多普勒敏感,线性调频信号能实现较宽的带宽,其匹配滤波器对回波信号的多普勒频移不敏感,但产生方法单一,易于被截获和干扰。文章提出一种码内线性调频、码间相位编码的复合调制的新型脉冲压缩信号,并分析其典型特征,仿真验证表明该信号能兼具两种单一调制信号的优点同时克服其缺陷,是一种性能优异的低截获雷达信号。In the design of radar low interception,the design of transmitting signal is very critical.In order to obtain a low probability of interception,complex radar emission waveform must be selected.For phase coding,it is extremely hard to match filter the pseudo-random sequence coded signal,which effectively reduces the probability of being intercepted.But phase coding signal is sensitive to Doppler frequency.Linear frequency modulated signal can achieve wide bandwidth,and it is not sensitive to Doppler frequency,but it is signal to produce,which makes it easy to be intercepted and interfered.In this paper,a new type of pulse compression signal is proposed,which is composed of linear frequency modulation(LFM)in the code and phase coding inter-code,and its typical properties are analyzed.The simulation results show that the signal can obtain the advantages of the two single modulated signals and overcomes its defects.It is a low-intercept radar signal with excellent performance.

关 键 词：低截获 线性调频 相位编码 复合调制 

分 类 号：P412.25[天文地球—大气科学及气象学]