摘要
提出一种基于DDFS的全数字方波LFM产生电路的方案,介绍电路的结构、工作原理及参数选择,分析电路的性能特点,比较正弦LFM与方波LFM信号的自相关函数和频谱,研究将方波LFM信号作为超声波发生器激励信号进行TDOA测量的方法,并用实验验证全数字离散方波LFM用于超声波发生器TDOA估计的有效性。
A DDFS-based digital rectangular LFM generator is introduced with the presentation from aspects of its structure,operation principles,and selection of the parameters.Comparisons of digital regular LFM with the traditional Sinc LFM in terms of its auto-correlation and frequency spectrum are also made to show the feasibil-ity of taking the rectangular LFM as the driving signal in the TDOA estimation.Experiments on the TDOA esti-mation were made with the presented ultrasonic generator to show the validity of this approach.
出处
《淮阴工学院学报》
CAS
2011年第5期20-25,共6页
Journal of Huaiyin Institute of Technology
