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Performance Analysis of MIMO Based CDMA Code Acquisition Over Rayleigh Fading Channels

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Abstract

This paper proposes a new MIMO based CDMA code acquisition scheme. The pilot codes consist of a number of short Gold code sequences which are transmitted in parallel using a group of transmit antennas. Reception diversity is performed by multiple receive antennas at the receiver. Three different acquisition detection techniques are proposed and compared. Corresponding threshold optimizations are investigated as well. Detection and false alarm probabilities are derived in closed form based on the outputs of non-coherent matched filters. The acquisition performance is evaluated in terms of mean acquisition time (MAT) in Rayleigh fading environment. It is shown that the proposed MIMO acquisition scheme exhibits a much better MAT performance than the conventional single-antenna acquisition scheme. The results reveal that multiple receive antennas can be utilized to significantly reduce the MAT at the expense of receiver complexity increase. On the other hand, increasing the number of transmit antennas makes the MAT performance more robust in the presence of strong interference.

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Authors and Affiliations

  1. Department of Electrical and Computer Engineering, Concordia University, Montreal, QC, Canada

    Deng Liao, Dongyu Qiu & Ahmed K. Elhakeem

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  1. Deng Liao
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  2. Dongyu Qiu
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  3. Ahmed K. Elhakeem
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Correspondence to Deng Liao.

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Liao, D., Qiu, D. & Elhakeem, A.K. Performance Analysis of MIMO Based CDMA Code Acquisition Over Rayleigh Fading Channels. Wireless Pers Commun 55, 457–473 (2010). https://doi.org/10.1007/s11277-009-9809-x

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  • DOI: https://doi.org/10.1007/s11277-009-9809-x

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