On Frequency Domain Doppler Diversity Using Basis Expansion Model and EM-Based Algorithms in CDMA Systems

In this paper, we propose an algorithm for frequency domain adaptive Doppler shift estimation in the presence of multiple Doppler subpaths in DS-CDMA systems. By modeling doubly selective channel with a basis expansion model (BEM), the proposed method works based on expectation-maximization (EM) alg...

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Bibliographic Details
Published inIEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference pp. 4429 - 4433
Main Authors Tianqi Wang, Cheng Li, Hsiao-Hwa Chen, Guizani, M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.11.2007
Subjects
Algorithm design and analysis
Computer science
Councils
Doppler shift
Fading
Frequency domain analysis
Frequency estimation
Multiaccess communication
Multipath channels
RAKE receivers
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ISBN1424410428
9781424410422
ISSN1930-529X
DOI10.1109/GLOCOM.2007.842

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Summary:In this paper, we propose an algorithm for frequency domain adaptive Doppler shift estimation in the presence of multiple Doppler subpaths in DS-CDMA systems. By modeling doubly selective channel with a basis expansion model (BEM), the proposed method works based on expectation-maximization (EM) algorithm and can accurately estimate Doppler shifts. A complete Cramer-Rao lower bound (CRLB) analysis of the estimation algorithms is also provided.
ISBN:1424410428
9781424410422
ISSN:1930-529X
DOI:10.1109/GLOCOM.2007.842