CAJ | 학술논문

本文研究在设定区间具有极低自相关幅值的相位编码波形设计方法，可用于雷达、声呐和通信系统进行干扰抑制和信号同步等。提出了一种基于功率谱逼近的波形设计算法。根据自相关与功率谱的傅立叶变换对关系，将自相关设计指标转换为功率谱设计指标；利用时、频域交替变换投影方法，且在迭代过程中动态构造理想序列功率谱，使设计波形的功率谱逐步逼近理想波形的功率谱，最终实现所期望的波形。与通用的非线性规划相比，该算法无需计算导数，内存消耗小，且迭代过程可由FFT高效实现。
본문연구재설정구간구유겁저자상관폭치적상위편마파형설계방법，가용우뢰체、성눌화통신계통진행간우억제화신호동보등。제출료일충기우공솔보핍근적파형설계산법。근거자상관여공솔보적부립협변환대관계，장자상관설계지표전환위공솔보설계지표；이용시、빈역교체변환투영방법，차재질대과정중동태구조이상서렬공솔보，사설계파형적공솔보축보핍근이상파형적공솔보，최종실현소기망적파형。여통용적비선성규화상비，해산법무수계산도수，내존소모소，차질대과정가유FFT고효실현。
This paper discusses the design of phase coded waveforms with ultra-low autocorrelation sidelobes in desired inter-vals .These waveforms can be used as interference suppression and signal synchronization waveforms for radar ,sonar and communi-cation systems .An algorithm based on power spectral density (PSD ) approximation is proposed .According to the relationship be-tween aperiodic autocorrelation sequence and the waveform PSD ,the autocorrelation design object is translated into a PSD design object .The method transforms and projects the design waveform in the time and the frequency domain iteratively .Thus the PSD of the design waveform approximates the ideal PSD iteratively in order to generate the desired waveform .Compared with the general nonlinear programming methods ,this method is derivative-free ,thus requires less computer memory ,and the iteration can be imple-mented by FFT efficiently .