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Title: Subspace-based multiple access suppression in synchronous interleaved OFDMA system
Authors: Shengwei, H.
Ko, C.C. 
Keywords: Interleaved Orthogonal Frequency Division Multiple Access (OFDMA)
MAI suppression
Issue Date: 2006
Citation: Shengwei, H.,Ko, C.C. (2006). Subspace-based multiple access suppression in synchronous interleaved OFDMA system. IEEE Vehicular Technology Conference : 872-876. ScholarBank@NUS Repository.
Abstract: In this paper, Multiple Access Interference (MAI) suppression in synchronous interleaved Orthogonal Frequency Division Multiple Access (OFDMA) system is investigated. Based on the signature vector formulated for each user, a new user detector is proposed. It is shown that when matched filtering is employed to suppress MAI in the proposed detector, under imperfect power control, strong users can severely degrade the performance of its neighboring users. To improve the system performance, we derive a subspace zero-forcing and a subspace MMSE MAI suppression scheme for the proposed detector. We show that only the knowledge of the desired user's CFO is required in MAI suppression and the system can be rendered almost MAI-free provided that the CFO estimation is accurate enough. © 2006 IEEE.
Source Title: IEEE Vehicular Technology Conference
ISBN: 1424400635
ISSN: 15502252
DOI: 10.1109/VTCF.2006.187
Appears in Collections:Staff Publications

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