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Multi-User Interference Cancellation Scheme(s) for Muliple Carrier Frequency Offset Compensation in Uplink OFDMA

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3 Author(s)
Huan Cong Nguyen ; Center for TeleInFrastructure, Aalborg University, Niels Jernes Vej 12, Aalborg Ost, 9220, Denmark Email: hcnd@kom.aau.dk ; Elisabeth De Carvalho ; Ramjee Prasad

We consider the uplink of an orthogonal frequency division multiple access (OFDMA)-based system, where each mobile station (MS) experiences a different carrier frequency offset (CFO). Unconnected CFOs destroy the orthogonality among subcarriers, which could cause severe inter-carrier interference (ICI) and degrade the system performance considerably. In this paper, we propose a novel multi-user interference (MUI) cancellation scheme for uplink OFDMA, which utilizes multiple orthogonal frequency division multiplexing (OFDM)-demodulators architecture to correct and then compensate the negative effects of multiple CFOs at the receiver's side. Numerical evaluation has shown a considerable performance gain compared to the conventional receiver

Published in:

2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications

Date of Conference:

11-14 Sept. 2006