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PN code acquisition using smart antennas and adaptive thresholding for spread spectrum communications

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Abstract

In this paper, we consider a pseudo-noise (PN) code acquisition for direct sequence spread spectrum communication in a Rayleigh fading multipath channel environment using smart antenna and adaptive thresholding automatic trimmed-mean constant false alarm rate (ATM-CFAR) processing. A smart antenna is an array of antenna elements that can modify the array pattern adaptively to minimize the effect of multiple access interference (MAI) from other users and multipath. PN code acquisition using a fixed threshold may lead to an excessive number of false alarms, and thus, adaptive thresholding ATM-CFAR processing is considered. In addition, since the interference (MAI and multipath) can be considered as outliers, an outlier determiner is embedded to the proposed system based on the interquartile range. This novel approach of combining smart antennas and adaptive thresholding ATM-CFAR detection with an outlier determiner proved to be very robust since it resulted in a serious enhancement of the probability of detection.

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Acknowledgments

This work was supported by the Research Centre of College of Computer and Information Sciences, King Saud University. The authors are grateful for this support.

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Authors and Affiliations

  1. Department of Computer Engineering, College of Computer and Information Sciences, King Saud University, Riyadh, KSA

    Aghus Sofwan & Salman A. AlQahtani

  2. Department of Electrical and Computer Engineering Technology, Valencia College, Orlando, FL, USA

    Mourad Barkat

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  1. Aghus Sofwan
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  3. Salman A. AlQahtani
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Correspondence to Salman A. AlQahtani.

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Sofwan, A., Barkat, M. & AlQahtani, S.A. PN code acquisition using smart antennas and adaptive thresholding for spread spectrum communications. Wireless Netw 22, 223–234 (2016). https://doi.org/10.1007/s11276-015-0969-1

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