CAJ | 학술논문

　　针对时频分析方法在直扩/跳频（DS/FH）混合扩频信号参数估计中存在时频分辨率受限、交叉项干扰、实时性差等缺点，通过分析DS/FH信号的时频特性，提出了一种新的DS/FH信号参数估计方法。该方法从待测信号的时域分析出发，利用不同跳频点对应的周期数不相等的性质，完成了对DS/FH信号的时域分割，最后结合DS/FH信号性质完成了对待测信号跳频周期、驻留时间、跳频频率的估计。仿真结果表明，该方法针对DS/FH信号的参数估计精度高，运算速度较快，且没有干扰频率。
　　침대시빈분석방법재직확/도빈（DS/FH）혼합확빈신호삼수고계중존재시빈분변솔수한、교차항간우、실시성차등결점，통과분석DS/FH신호적시빈특성，제출료일충신적DS/FH신호삼수고계방법。해방법종대측신호적시역분석출발，이용불동도빈점대응적주기수불상등적성질，완성료대DS/FH신호적시역분할，최후결합DS/FH신호성질완성료대대측신호도빈주기、주류시간、도빈빈솔적고계。방진결과표명，해방법침대DS/FH신호적삼수고계정도고，운산속도교쾌，차몰유간우빈솔。
In order to avoid the shortcomings such as the limited time-frequency resolution,redundant cross terms and poor real-time in using the time-frequency distribution to estimate the DS/FH (Direct Sequence/Fre-quency Hopping)signal parameters,a new parameter estimation method that takes the time domain analysis as a starting point is presented through analyzing the time-frequency characteristics of DS/FH signal . Based on timedomain analysis of the test signal,the method divides the DS/FH signal in the time domain because the different frequency signals have different number of cycles . Then,it completes estimation of the parameters such as hop-ping period,dwell time,and hopping frequency . The experimental results show that the method is extremely ef-fective for DS/FH signal . Apart from that,it features high estimation accuracy,fast operation and no interfer-ence frequency.