Linear Receiver for OFDMA Uplink with both CFOs and IQ Imbalances

Weile ZHANG  Qinye YIN  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.2   pp.639-642
Publication Date: 2012/02/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.639
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
IQ imbalance,  carrier frequency offset,  OFDMA,  

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In orthogonal frequency division multiple access (OFD-MA) uplink, the distortions introduced by both multiple carrier frequency offsets (CFOs) and in-phase and quadrature-phase (IQ) imbalances will severely degrade the system performance. With both CFOs and IQ imbalances, signal detection at the receiver becomes hard, if not impossible. In this letter, a linear receiver is proposed to cope with the distortions at a slight drop in system transmission rate. The analysis and simulations demonstrate the effectiveness of the proposed approach.