一类单通道信号的时频分析

The time-frequency analysis of a single channel signal

根据循环平稳信号分析理论 ,对一类单通道信号进行了时频分析 ,并在此基础上提出了利用该信号在不同时段功率差值提取目标位置的方法 ,其最大优点在于可以固定中频带宽 ,从而省去滤波器组 ,同时具有精度高、抗噪声性能强的特点。仿真结果表明 ,采用功率检波法得到的结果与理论值是吻合的。

Tracking reciver is the most important device in data relay satellite,in which single channel monopulse (SCM) technology is applied in TDRS-H(NASA),DRTS(NASDA),ARTEMIS(ESA).As conventional method,one can get target direction by measuring the difference of amplitude with period of time of single channel signal in autottracking system.In this paper,a kind of single channel signal is originally analysized based on the cyclostationary theory,and some useful results can be gotten,then a new way based on these results is developed that can make tracking receiver more accurate,efficient and reliable than conventional method.In the end,with the computer simulation,the new way proves to be superior to old method and can be introduced in several tracking systems.