基于类Frank码的非连续LFM距离旁瓣抑制  

Range sidelobe suppression of discontinuous spectra LFM signal based on Frank-like code

作　　者：沈佳琪[1] 桂任舟[1] 

机构地区：[1]同济大学电子与信息工程学院,上海200092

出　　处：《电子技术应用》2014年第6期112-114,共3页Application of Electronic Technique

基　　金：国家自然科学基金(61271351)

摘　　要：为了在频率占用日益增多的自由空间中获得较大的带宽,需要将较多零星干净频段合并为系统的有效工作带宽。但是载波频率的跳变会引起接收基带信号的相位跳变,影响系统的分辨性能。针对非连续谱线性调频信号的接收基带信号相位跳变问题,提出了一种类Frank码型。利用该码型控制发射信号以及接收端信号的相位,可以补偿接收端基带信号的相位跳变。仿真结果表明,该方法可以压低模糊函数的旁瓣,解决距离模糊问题。For the purpose of getting wider band in the even busier air, several＂clear＂ frequency bands are aggregated as a whole wide band. The phase gap caused by the frequency-hopping will raise the sidelobe both in distance and velocity domain. Based on this problem, this paper proposes a Frank-like code, which is applied to control the phase of transmitted signal and of oscillator in the receiver. During the process in the receiver, the phase gap can be compensated by the application of Frank-like code. The results of simulation reveal that the sidelobe in the distance domain is suppressed.

关 键 词：线性调频 非连续谱 模糊函数 旁瓣抑制 

分 类 号：TN957.51[电子电信—信号与信息处理]