Frequency estimation based on interpolated all-phase spectrum with sub-Nyquist sampling

被引：0
|
作者：
Chang H. [1 ]
Shi H.-C. [2 ]
Zhao G.-Q. [1 ]
Niu X.-L. [1 ]
机构：
[1] Research Inst. of Electronic Countermeasure, Xidian Univ.
[2] Shenyang Dongji Industries Group Corporation
来源：
Yuhang Xuebao/Journal of Astronautics | 2010年 / 31卷 / 12期
关键词：
All-phase Rife synthesized algorithm; Cross spectrum; Frequency estimation; Sub-Nyquist sampling;
D O I：
10.3873/j.issn.1000-1328.2010.12.022
中图分类号：
学科分类号：
摘要：
By using cross spectrum of signals from two independent channels, unambiguous frequency estimation for wideband signal with sub-Nyquist sampling is provided. To improve frequency measurement accuracy, high accuracy estimation of bias between real signal frequency and quantization frequency related to maximum amplitude of outputs in frequency domain is required. Based on joint all-phase FFT and traditional FFT, all-phase Rife synthesized algorithm composed of all-phase Rife algorithm and modified fined Rife algorithm is proposed in this paper. Which algorithm is employed is determined according to the amplitude ratio of maximum spectrum and sub-maximum spectrum of all-phase FFT outputs. Performance of effectiveness and high accuracy of the method are supported by simulation results.
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页码：2771 / 2775
页数：4
相关论文
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