| 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PWH
T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。 |
| 关键词: 时频分析 周期Wigner-Hough变换 LFMCW 检测性能分析 |
| DOI： |
|
| 基金项目: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) |
|
| Digitized periodic Wigner-Hough transform and its performance analysis |
| WANG Ze-zhong,LIU Feng,HUANG Yu,XIANG Chong-wen |
| () |
| Abstract: |
| Linear Frequency Modulation Continuous Wave(LFMCW) detection performance of the
d
igitized Periodic Wigner-Hough Transform(PWHT) algorithm is studied
. Firstly, the weak signal detection performance is analysed through the derivat
i
on of the gain of the input signal-to-noise ratio(SNR) of a noisy LFMCW signal
t
o the output SNR after
PWHT processing.Then, the PWHT and Wigner-Hough Transform(WHT) detection perfo
rmances are compared by obtaining the promotion of the gain of the input SNR to
the output SNR
after PWHT processing and WHT processing. Fin
ally, the quasi-coherent integration effect of the PWHT algorithm in LFMCW dete
ction is demonstrated through simulations, and the fact that PWHT performs bette
r in the detection of LFMCW signal than WHT is also verified. |
| Key words: time frequency analysis digitized periodic Wigner-Hough transform LFMCW detection performance analysis |
