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Iterative Joint Correlation Interval Selection and Doppler Spread Estimation
Peng ZHANG Xiaodong XU Guangguo BI Xiuying CAO Junhui ZHAO
Publication
IEICE TRANSACTIONS on Communications
Vol.E89-B
No.11
pp.3156-3159 Publication Date: 2006/11/01 Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.11.3156 Print ISSN: 0916-8516 Type of Manuscript: LETTER Category: Wireless Communication Technologies Keyword: Doppler spread, autocorrelation, iteration,
Full Text: PDF(251.8KB)>>
Summary:
In this paper, the relationship between correlation interval (CI) and estimate is investigated. Then a special correlation interval is explored that is adaptive to all levels of signal-to-noise ratio (SNR) and velocity conditions, and the mean square error is deduced. Finally, we propose an iterative algorithm that achieves the special correlation interval and calculates the Doppler spread by increasing the resolution on time-domain iteratively. Simulation results show that compared with conventional schemes, performance of the proposed algorithm is basically independent of velocity variation and less sensitive to SNR, especially in low SNR environments. It achieves high accurate estimation directly without any post-rectification.
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