摘要
在单脉冲体制跟踪悬停直升机时,提出一种采用自混频方式来消除旋翼对信号调制的方法。推导全相参和部分相参2种信号的时域、频域表达式,对其频谱进行分析。对二者的积累效果进行分析,通过仿真可知部分相参信号当载频在某些特定值时积累效果和全相参信号是相同的,其他情况下相差很多。
When using monopulse method for tracking a hovering helicopter, a self-mixing method is proposed to eliminate signal modulation caused by rotor. The expressions in time and frequency domains of two coherent signals are derived, and the characteristics of frequency spectrum is analyzed. Both coherent signal integration performances are analyzed. Simulation results show that the integration performances are equivalent only for some carrier frequencies of partly coherent signal, and the performance of partly coherent signal is worse for other situations.
出处
《现代雷达》
CSCD
北大核心
2009年第3期31-33,37,共4页
Modern Radar
关键词
全相参
部分相参
自混频
频谱
积累
coherent
partly coherent
self-mixing
frequency spectrum
integration
