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ML estimation and correction of frequency offset for MC-CDMA systems over fading channels

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2 Author(s)
Qingjiang Tian ; Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA ; Ben Letaief, K.

Multi-carrier code division multiple access (MC-CDMA) has been proposed as one of the air interface candidates for the third generation wireless communication systems. However, MC-CDMA systems suffer a lot of performance degradation due to carrier frequency offsets. In this paper, we derive the likelihood function for the carrier frequency offset for MC-CDMA systems for the downlink over Rayleigh flat fading channels. We also propose a gradient algorithm to estimate and minimize the carrier frequency offset in a tracking mode. Simulation results show that system performance can be improved significantly even with only a few iterations

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Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd  (Volume:1 )

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