利用小波變換的高性能譜估計算法
AN EXCELLENT PERFORMANCE SPECTRUM ESTIMATION ALGOTITHM BASED ON WAVELET TRANSFORM
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摘要: 本文提出了基于小波變換的一種新的高性能譜估計算法。由于小波變換同時在時、頻域具有良好的局部化特性,本文的算法適用于低信噪比、短時數(shù)據(jù)序列的情況。文中給出的計算機仿真結(jié)果證明,本文算法具有較高的分辨率和估計精度、較低的信噪比門限。
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關(guān)鍵詞:
- 小波變換; 快速傅里葉變換; 功率譜估計
Abstract: In this paper an excellent performance spectrum estimation algotithm based on wavelet transform is given. Because of the joint time-frequency localization characteristic of wavelet transform,this algotithm is also used in the spectrum estimation of short data series. The results of computer simulation illustrate that this method achieves high resolution, high accuracy, and low SNR threshold. -
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