Hai-jie SHI(石海杰), Zhi-guo GUI(桂志国), Quan ZHANG(张权)
(School of Information Communication and Engineering of North University of China,Taiyuan 030051,China)
Abstract-This paper addresses an algebraic approach for wideband frequency estimation with sub-Nyquist temporal sampling. Firstly, an algorithm based on double polynomial root finding procedure to estimate aliasing frequencies and joint aliasing frequencies-time delay phases in multi-signal situation is presented. Since the sum of time delay phases determined from the least squares estimation shows the characteristics of the corresponding parameters pairs, then the pair-matching method is conducted by combining it with estimated parameters mentioned above. Although the proposed method is computationally simpler than the conventional schemes, simulation results show that it can approach optimum estimation performance.
Key words-wideband frequency estimation; sub-nyquist sampling; polynomial root finding; pair matching
Manuscript Number: 1674-8042(2011)04-0349-04
doi: 10.3969/j.issn.1674-8042.2011.04.011
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