LFM signal parameter estimation based on spectrum zoom

被引：0
|
作者：
Si, Xi-Cai [1 ]
Zhu, Xiao [1 ]
机构：
[1] Coll. of Information and Communication Engineering, Harbin Engineering Univ., Harbin 150001, China
来源：
Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics | 2009年 / 31卷 / 03期
关键词：
Computational efficiency - Interactive computer systems - Z transforms - Chirp modulation - Frequency estimation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The existing LFM signal parameter estimation algorithm is hard to fulfill tasks in a real-time system for heavy computation loads. A fast efficient algorithm based on spectrum zoom analysis is proposed. First, the spectrum of the array multiplication of the IF sample and its delayed version is analyzed to obtain the rough estimate of the chirp rate, then chirp-Z transform is applied to estimate the chirp rate accurately. Second, using the direct de-chirp method with the estimated chirp rate, the estimation of the initial frequency of the LFM signal can be done. The spectrum zoom method can also be used to improve its accuracy. Simulation results show the proposed algorithm is effective.
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页码：507 / 510
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