期刊文献+

一种新颖的双Chirp信号水声信道多参数估计算法 被引量:3

Novel double-Chirp signal algorithm for multi-parameter estimation of underwater acoustic channel
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摘要 针对水声信道多参数的估计问题,提出了一种新颖的基于分数阶傅里叶变换(fractional Fourier transform,FRFT)的估计算法。采用发送固定时间间隔为T的2个Chirp信号,通过对接收信号进行FRFT处理后的峰值间隔变化,实现对频偏和时延的估计。更进一步说,该算法主要思路是利用了Chirp信号的调频斜率不变特性,避免了再对接收信号进行阶数的搜索,这极大地降低了计算量。通过计算机仿真验证和实验验证,表明该算法是有效的。 A novel algorithm is proposed for the multi-parameter estimation of underwater acoustic channel based on fractional Fourier transform(FRFT). Both Doppler shift and time delay can be estimated through the peak interval change of Chirpl and Chirp2 after FRFT. Furthermore, it is not necessary to search the best angle because of the in- variant characteristic of the Chirp rate. Simulation and experiment results show the effectiveness of the algorithm.
作者 王彪 杨光
出处 《仪器仪表学报》 EI CAS CSCD 北大核心 2012年第2期300-305,共6页 Chinese Journal of Scientific Instrument
基金 江苏省高校优势学科建设工程一期项目(船舶与海洋工程) 江苏科技大学科研启动项目(35030907)资助
关键词 多普勒频偏 延时 FRFT 水声信道 Doppler shift time delay fractional Fourier transform(FRFT) underwater acoustic channel
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