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O3BPSK-based Linear Decorrelating Detector for Asynchronous DS/CDMA Systems over Frequency-Selective Rayleigh Fading Channels

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Abstract

In this paper, a convenient signaling scheme, called orthogonal on–off BPSK (O3BPSK), along with a simple one-shot linear decorrelating detector (LDD) and a whitening Rake bank, is proposed for near–far resistant detection in asynchronous DS/CDMA systems. Based on the maximum multi-path spreading delay, a minimum duration of “off” is suggested, during which the temporally adjacent bits (TABs) that contain multi-user interference (MUI) and inter-symbol interference (ISI) from different users at the receiver are decoupled. The O3BPSK signaling scheme is combined with the whitening Rake receiver to preserve multi-path diversity gain in multi-path fading CDMA channels. The scheme offers low complexity, no detection delay, near–far resistance, and compensation for fading channels.

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Authors and Affiliations

  1. The Department of Computer and Communication Engineering, Chaoyang University of Technology, No. 168, Jifong East Road, Wufong Township, Taichung County, 41349, Taiwan, ROC

    Chia-Hsin Cheng

  2. The Department of Computer Science and Information Engineering, Da-Yeh University, No. 112, Shan-Jiau Rd., Da-Tsuen, Chang-Hua, 515, Taiwan, ROC

    Jen-Yung Lin

  3. The Institute of Electrical Engineering, National Chung Cheng University, No. 160, SanHsing, Ming-Hsiung, Chia-Yi, 621, Taiwan, ROC

    Chao-Kai Wen

  4. The Department of Electrical Engineering, Tunghai University, No. 181, Section 3, Taichung Harbor Road, Taichung, 40704, Taiwan, ROC

    Jyh-Horng Wen

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  1. Chia-Hsin Cheng
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  2. Jen-Yung Lin
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  3. Chao-Kai Wen
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  4. Jyh-Horng Wen
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Correspondence to Jyh-Horng Wen.

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Cheng, CH., Lin, JY., Wen, CK. et al. O3BPSK-based Linear Decorrelating Detector for Asynchronous DS/CDMA Systems over Frequency-Selective Rayleigh Fading Channels. Wireless Pers Commun 48, 311–325 (2009). https://doi.org/10.1007/s11277-008-9524-z

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