基于对数调频谐波仿生信号的参量估计

贾 宁; 梁 红; 杨长生; 杜金香

doi:10.11993/j.issn.1673-1948.2013.04.005

基于对数调频谐波仿生信号的参量估计

doi: 10.11993/j.issn.1673-1948.2013.04.005

西北工业大学航海学院, 陕西西安, 710072

基金项目: 国家自然科学基金(61201322), 西北工业大学基础研究基金(JC20110207)

详细信息

作者简介:
贾宁(1986-), 女, 在读硕士, 研究方向为信号与信息处理.

中图分类号: TJ630.1
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- 被引次数: 0
出版历程
- 收稿日期: 2012-09-07
- 修回日期: 2012-12-14
- 刊出日期: 2013-08-20

Parameter Estimation Based on Bat-inspired Signals with Logarithmic Frequency Modulation

College of Marine Engineering, Northwestern Ploytechnical University, Xi′an 710072, China

摘要

摘要: 介绍了一种基于仿生信号的参量估计方法。首先给出了仿生信号模型, 针对常用的线性调频(LFM)谐波信号和对数调频谐波信号, 分析了其宽带模糊度图, 比较了两者的时延分辨率。在此基础上, 采用仿生生物模型对2种信号进行了处理, 并运用1组Q值相同、带宽变化的有限脉冲响应(FIR)滤波器组实现耳蜗滤波。最后, 对这2种仿生信号的检测性能、距离估计的精度及其均方根误差进行比较。分析表明, 仿生生物模型采用对数调频谐波信号具有较好的时延分辨性能, 同时具有更好的检测和参量估计性能。
- 对数调频谐波信号 /
- 线性调频谐波信号 /
- 仿生处理模型 /
- 参量估计
Abstract: Considering the remarkable target detection performance of a bat, the wideband ambiguity functions of bat-inspired signals with linear frequency modulation(LFM) and logarithmic time frequency modulation(LTFM) are analyzed. The results indicate that the time delay resolution of LTFM is more superior to that of LFM. The bat-inspired signal processing model based on the bat echolocation system is also discussed. A finite impulse response(FIR) linear filter bank with same Q value and different bandwidth is used to implement a cochlear filter. Conclusion is drawn that the bat-inspired signal processing model with LTFM can achieve better time delay resolution performance than the same model with LFM, and it behaves better in detection and parameter estimation.

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参考文献(5)

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