离散周期Wigner-Hough变换及其检测性能分析  

Digitized Periodic Wigner-Hough Transform and its Performance Analysis

作　　者：王泽众[1] 刘锋[2] 黄宇[1] 向崇文[1] 

机构地区：[1]海军航空工程学院研究生管理大队,山东烟台264001 [2]海军航空工程学院电子信息工程系,山东烟台264001

出　　处：《电讯技术》2012年第9期1452-1458,共7页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(60902054);中国博士后科学基金资助项目(20090460114)~~

摘　　要：分析了周期Wigner-Hough变换(PWHT)进行离散化计算时,对线性调频连续波(LFMCW)信号的检测性能。通过推导高斯白噪声中LFMCW信号经离散化PWHT后信噪比处理增益表达式,分析了离散PWHT的弱信号检测性能。通过推导离散PWHT较离散Wigner-Hough变换(WHT)的检测性能优势表达式,比较了离散PWHT与离散WHT算法的检测性能。仿真实验验证了离散PWHT的信噪比处理增益具有准相干积累的效果,PWHT较WHT更优的检测性能。Linear Frequency Modulation Continuous Wave（LFMCW） detection performance of the digitized Periodic Wigner- Hough Transform（PWHT） algorithm is studied. Firstly, the weak signal detection performance is analysed through the derivation of the gain of the input signal-to-noise ratio（SNR） of a noisy LFMCW signal to the output SNR after PWHT processing. Then, the PWHT and Wigner-Hough Transform（WHT） detection performances are compared by obtaining the promotion of the gain of the input SNR to the output SNR after PWHT processing and WHT processing. Finally, the quasi-coherent integration effect of the PWHT algorithm in LFM- CW detection is demonstrated through simulations, and the fact that PWHT performs better in the detection of LFMCW signal than WttT is also verified.

关 键 词：时频分析 周期Wigner-Hough变换 LFMCW 检测性能分析 

分 类 号：TN971.1[电子电信—信号与信息处理]