摘要
系统地研究了快速解线性调频技术，采用了一种快速频率估计的综合算法取代了传统的一维频率搜索方法。如采用两个ＦＦＴ并行处理，那么只需一次ＦＦＴ运行时间就可得到精确的频率估计值，整个解线性调频过程相当两次ＦＦＴ和两次相关运算时间，便于硬件实现。同时以比较简洁的方法得到了输出信噪比和最佳延迟时间的解析表达式，使本算法理论趋于完善。
Describes systematically an computationally efficient algorithm for dechirp. We use a fast and accurate frequency estimator synthetic approach to replace the 1 D Search procedure. This algorithm can be performed in one FFT pe riod by using two FFT devices working in parallel. So the dechirp procedure can be finished in two FFT periods plus two correlator periods only.The output signal to noise ratio and the optimal delay time are obtained by very simple methods.
出处
《数据采集与处理》
CSCD
1999年第2期175-178,共4页
Journal of Data Acquisition and Processing
基金
航空科学基金
