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Multiuser Carrier Frequency Offset Estimation for OFDMA Uplink Based on Multi-Antenna Weile ZHANG Junsong WANG Qinye YIN Ang FENG Publication IEICE TRANSACTIONS on Communications Vol.E93-B No.5 pp.1276-1279 Publication Date: 2010/05/01 Online ISSN: 1745-1345 DOI: 10.1587/transcom.E93.B.1276 Print ISSN: 0916-8516 Type of Manuscript: LETTER Category: Wireless Communication Technologies Keyword: OFDMA uplink, CFO estimation, rotation invariance, space diversity, Full Text: PDF(165.4KB)>>
Summary: In this letter, a novel method is proposed for carrier-frequency offset (CFO) estimation for multiple users in orthogonal frequency division multiple access (OFDMA) uplink with the generalized carrier assignment scheme (GCAS). The base station (BS) is equipped with multiple antennas, and each user's CFO can be estimated by the ESPRIT-like method that utilizes the rotation invariance of the space-domain snapshot matrix. The method is still effective even in fully loaded system with all subcarriers allocated to users. Simulation results illustrate the high performance of the proposed algorithm. | |||||
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