| 多普勒信号频域压缩算法中最佳时窗长的选择 |
| |
| 引用本文： | 商艳海,吴嗣亮,何佩琨.多普勒信号频域压缩算法中最佳时窗长的选择[J].北京理工大学学报,2003,23(1):109-111. |
| |
| 作者姓名： | 商艳海 吴嗣亮 何佩琨 |
| |
| 作者单位： | 北京理工大学,信息科学技术学院电子工程系,北京,100081 |
| |
| 基金项目： | 总装备部科研项目;413010105B; |
| |
| 摘 要： | 研究基于短时傅里叶变换（STFT）的可变窗长的多普勒信号的频域压缩算法中最佳时窗长度的选择问题，提出了根据系统压缩倍数的要求及信号的局部平稳性，选择STFT时间窗长度的可变窗长的频压缩算法，并得到其简化的二窗法频域压缩算法，仿真结果表明，与固定窗长法相比，二窗法频域压缩算法克服了取固定窗长度时存在的偏差较大的问题，取得了比较满意的仿真结果。
|
| 关 键 词： | 多普勒信号 最佳时窗长 短时傅里叶变换 频域数据压缩 窗函数 雷达信号处理 |
| 文章编号： | 1001-0645(2003)01-0109-03 |
| 收稿时间： | 6/3/2002 12:00:00 AM |
The Selection of Optimum Time Window Length in the Compression Algorithm in Frequency Domain for Doppler Signals |
| |
| SHANG Yan-hai,WU Si-liang and HE Pei-kun.The Selection of Optimum Time Window Length in the Compression Algorithm in Frequency Domain for Doppler Signals[J].Journal of Beijing Institute of Technology(Natural Science Edition),2003,23(1):109-111. |
| |
| Authors: | SHANG Yan-hai WU Si-liang and HE Pei-kun |
| |
| Institution: | Department of Electronic Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing100081, China;Department of Electronic Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing100081, China;Department of Electronic Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing100081, China |
| |
| Abstract: | The selection of time window lengths in compression algorithm for Doppler signals based on STFT is studied. The compression algorithm with varying window length in light of the local stationarity of the Doppler signal and the compression ratio is proposed. In the meantime, the simplified algorithm - the two-window compression algorithm is derived from it. Simulations showed that the new method can reduce the errors existing in methods based on STFT with constant window lengths. |
| |
| Keywords: | STFT data compression in frequency domain window function |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《北京理工大学学报》浏览原始摘要信息 |
| 点击此处可从《北京理工大学学报》下载免费的PDF全文 |
