Receiver design for multicarrier CDMA using frequency-domain oversampling

Authors:
Qinghua Shi;Yong Liang Guan;Yi Gong;Choi Look Law
Affiliations:
Department of Electronic Engineering, University of Electro-Communications, Tokyo, Japan and Positioning and Wireless Technology Centre, Nanyang Technological University, Singapore;Positioning and Wireless Technology Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore;Positioning and Wireless Technology Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore;Positioning and Wireless Technology Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
Venue:
IEEE Transactions on Wireless Communications
Year:
2009

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Abstract

Based on the frequency-domain oversampling and minimum mean-square error (MMSE) principles, we propose three linear single-user detectors for downlink multicarrier code-division 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.