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In uplink orthogonal frequency division multiple access (OFDMA) systems, multiuser interference (MUI) occurs due to different carrier frequency offsets (CFO) of different users at the receiver. In this paper, we present a multistage linear parallel interference cancellation (LPIC) approach to mitigate the effect of this MUI in uplink OFDMA. The proposed scheme first performs CFO compensation (in time...
This paper presents a comparative study of two receiver schemes for interleaved OFDMA uplink. In the first scheme, called the post-DFT processing based interference cancellation receiver, the CFOs are compensated in frequency domain and an iterative interference-cancellation scheme is used to reduce the inter carrier interference (ICI) and/or multiuser interference (MUI). The other scheme, the signal...
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