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Title: A tracking based BEM algorithm for joint channel and CFO estimation in OFDMA uplink
Authors: Rabbi, M.F.
Ko, C.C. 
Issue Date: 2011
Citation: Rabbi, M.F.,Ko, C.C. (2011). A tracking based BEM algorithm for joint channel and CFO estimation in OFDMA uplink. 2011 Wireless Advanced, WiAd 2011 : 90-94. ScholarBank@NUS Repository.
Abstract: This paper investigates joint channel and Carrier Frequency Offset (CFO) estimation for Orthogonal Frequency Division Multiple Access (OFDMA) uplink system in doubly selective channel. We develop a Basis Expansion Model (BEM) based signal model for the OFDMA system in a doubly selective channel and, then we analyze the Inter-carrier Interference (ICI) introduced by rotation due to CFO. After formulating a Maximum Likelihood (ML) based CFO compensation method in time domain, a tracking based BEM algorithm is developed to estimate the BEM coefficients in frequency domain. By introducing a tracking term in the BEM coefficients, giving the rate of change in the coefficients, the algorithm is particularly suitable for high mobility applications. Specifically, the algorithm estimates the BEM coefficients for each OF-DMA block in an iterative manner based on using a new objective function that takes into consideration first order variations in the coefficients in the current and adjacent blocks. © 2011 IEEE.
Source Title: 2011 Wireless Advanced, WiAd 2011
ISBN: 9781457701092
DOI: 10.1109/WiAd.2011.5983292
Appears in Collections:Staff Publications

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