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Receiver design for multicarrier CDMA using frequency-domain oversampling

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4 Author(s)
Qinghua Shi ; Positioning & Wireless Technol. Centre, Nanyang Technol. Univ., Singapore, Singapore ; Yong Liang Guan ; Yi Gong ; Law, C.L.

Based on the frequency-domain oversampling and minimum mean-square error (MMSE) principles, we propose three linear single-user detectors for downlink multicarrier codedivision multiple-access (MC-CDMA) systems. We begin with an optimal linear MMSE detector, which is computationally demanding. To reduce the complexity, a two-stage MMSE detector and a diagonal one-stage MMSE detector are developed subsequently. Simulation results show that the proposed detectors can efficiently suppress the multiple access interference (MAI) caused by frequency-selective fading, near-far effect, frequency offset, and nonlinear power amplification.

Published in:

Wireless Communications, IEEE Transactions on  (Volume:8 ,  Issue: 5 )