| WIGNER—VILLE分布及其在FMCW信号识别中的应用 |
| |
| 引用本文： | 韩吉衢,陈乐平.WIGNER—VILLE分布及其在FMCW信号识别中的应用[J].烟台大学学报(自然科学与工程版),2009,22(3):185-188. |
| |
| 作者姓名： | 韩吉衢 陈乐平 |
| |
| 作者单位： | 烟台大学,光电信息科学技术学院,山东,烟台,264005 |
| |
| 摘 要： | 介绍了FMCW信号以及Wigner-Ville分布，对利用Wigner—Ville分布识别FMCW信号进行了研究．分别对信噪比为∞，6dB，3dB，0dB，-3dB，-6dB的FMCW信号作了WVD，PWVD，SPWVD，RSPWVD的MATLAB仿真，并做了比较研究，结果表明WVD抗噪性较差，且交叉项影响较大，当信噪比较小时，基本不能识别信号；PWVD，SPWVD交叉项有所减小，但时频聚集性变差，抗噪性提高不大；RSPWVD各方面性能均有较大提高．
|
| 关 键 词： | 线性调频 时频分析 调频连续波信号 |
Wigner-Ville Distribution and Its Application in Identification of FMCW |
| |
| HAN Ji-qu,CHEN Le-ping.Wigner-Ville Distribution and Its Application in Identification of FMCW[J].Journal of Yantai University(Natural Science and Engineering edirion),2009,22(3):185-188. |
| |
| Authors: | HAN Ji-qu CHEN Le-ping |
| |
| Institution: | (Institute of Science and Technology for Opto-Electronics Informaton, Yantai University,Yantai 264005, China) |
| |
| Abstract: | The FMCW signal and Wigner-Ville distribution （WVD） are introduced and the recognition of FMCW signal with WVD method is studied. Based on WVD, PWVD, SPWVD and RSPWVD respectively, the FMCW signals with ∞ , 6dB, 3dB, 0dB, -3dB and -6dB SNR are simulated by MATLAB. The compared results indicate that WVD has poor noise immunity and larger cross-term. When the SNR is small, the FMCW signal can hardly be recognized. For the PWVD and SPWVD, there are smaller cross terms but worse time-frequency assembling character, which limits the improvement of noise immunity. Compared to the other methods, the RSPWVD can obtain better performance in all respects. |
| |
| Keywords: | LFM time-frequency FMCW |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
