Instantaneous frequency measurement method for the broadband non-stationary signal

被引：0

作者：

Wang H. ^{[1
]}

Fan W. ^{[2
]}

Zhang S. ^{[3
]}

机构：

[1] School of Mechano-Electronic Engineering, Xidian Univ.

[2] The 8th Institute of Shanghai Academy of Spaceflight Tech.

[3] Zhejiang Vocational and Technical College

来源：

Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University | 2011年 / 38卷 / 06期

关键词：

Adaptive filtering; Broadband non-stationary signal; Error analysis; Hilbert transformation; Instantaneous frequency measurement;

D O I：

10.3969/j.issn.1001-2400.2011.06.009

中图分类号：

学科分类号：

摘要：

An instantaneous frequency measurement method for broadband non-stationary signal is presented. The signal can be decomposed into progressive single-frequency signals by added qualification adaptive filters. According to their phase functions of analytical signals, the instantaneous frequencies are obtained. By integration of time-frequency relationship of all components, the instantaneous frequencies of broadband non-stationary signal are accurately measured. Simulation and error analysis prove that this method overcomes the difficulties in instantaneous frequency measuring of Fourier analysis, Wavelet transformation and Hilbert-Huang algorithm for the broadband non-stationary signal. In the whole analyzed frequency band it can achieve a higher frequency measurement resolution and has a measurement error of less than 0.2 MHz for the signals with an SNR of above 0 dB. For 8 μs long signal, this method has a better real-time processing capability, but an initial operational delay of 25.816 μs. Therefore, this method can meet the requirements of instantaneous frequency measurement for the broadband non-stationary signal.

引用

页码：55 / 61

页数：6

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