CAJ | 학술논문

针对线性调频连续波( LFMCW)雷达信号特征参数提取的问题，提出了一种参数估计的方法。首先根据信号自相关函数的特点，进行峰值距离的平均，实现了调制周期的估计。然后通过解线调法得到信号的调频斜率，再通过共轭匹配法进行起始时间的搜索，得到信号的起始频率。与其他方法相比，该算法在减少计算量的同时，具有较强的抗噪性。仿真结果验证了该算法可以在低信噪比( SNR)下对LFMCW进行参数估计，具有很好的参数估计性能。
침대선성조빈련속파( LFMCW)뢰체신호특정삼수제취적문제，제출료일충삼수고계적방법。수선근거신호자상관함수적특점，진행봉치거리적평균，실현료조제주기적고계。연후통과해선조법득도신호적조빈사솔，재통과공액필배법진행기시시간적수색，득도신호적기시빈솔。여기타방법상비，해산법재감소계산량적동시，구유교강적항조성。방진결과험증료해산법가이재저신조비( SNR)하대LFMCW진행삼수고계，구유흔호적삼수고계성능。
To extract feature parameters of the radar signal of linear frequency modulation contin-uous wave (LFMCW), a parameter estimation method is proposed. Firstly, according to the characteristics of the autocorrelation function, the average distance of peaks is estimated to a-chieve the modulated period. Then, the chirp rate of the signal is received by dechirp. Finally, the initial frequency of the signal is estimated by searching the initial time using conjugate match. Compared with other methods, this algorithm can not only reduce the amount of compu-tation, but also improve the ability of immunity to noise. The results of simulation verify that the proposed algorithm has a good performance of parameter estimation for LFMCW at low signal-to-noise ratio ( SNR) .