Multiuser detection of asynchronous CDMA with frequency offset |
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Authors: | Mengkang Peng Yingjie Jay Guo Barton SK |
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Affiliation: | Ericsson Mobile Commun. (UK) Ltd., Basingstoke ; |
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Abstract: | This article presents a near-far resistant detection scheme for asynchronous code-division multiple access with frequency offset. Based on a one-shot technique and Taylor expansion, a zeroth-order and a first-order one-shot linear decorrelating detector (LDD) are proposed. The zeroth-order LDD has simple architecture but suffers performance degradation for large frequency offset. The first-order one-shot LDD, with increased complexity, has very good near-far resistant property even for large frequency offset. Two versions of the first-order one-shot LDD are investigated according to different Taylor expansion approaches. The feasibility of the proposed detectors is demonstrated by computer simulations |
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