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Pre-equalization Schemes for MIMO CC-CDMA Systems Over Frequency-Selective Fading Channels

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Abstract

Complementary coded code-division multiple access (CC-CDMA) system offers many attractive features over traditional CDMA systems due to its potential to provide ideal correlation properties and interference resistance feature in multiuser communication. However, the presence of multiple access interference (MAI) is one of the main drawbacks in reducing system performance under frequency-selective fading channels. In this paper, time domain pre-equalization (TDPE) is considered for downlink CC-CDMA systems to resist MAI over frequency-selective fading channels with perfect knowledge of channel state information. Pre-equalization shifts the complicated signal processing to the base station reducing the receiver complexity and improving the battery lifetime at the mobile station. We perform a comparison study between multiple-input multiple-output CC-CDMA (MIMO CC-CDMA) with pre-equalization and traditional equalization schemes towards overcoming MAI. The comparison study revealed that TDPE at the transmitter enriches diversity gain and reduces MAI in MIMO CC-CDMA systems with less receiver complexity.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, St. Xavier’s Catholic College of Engineering, Chunkankadai, Tamilnadu, 629003, India

    D. Judson

  2. Department of Electrical and Computer Engineering, San Francisco State University, San Francisco, CA, 94132, USA

    Vidhyacharan Bhaskar

  3. Department of Information Technology, PSNA College of Engineering and Technology, Dindigul, Tamilnadu, India

    K. Selvaraj

Authors
  1. D. Judson
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  2. Vidhyacharan Bhaskar
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  3. K. Selvaraj
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Correspondence to Vidhyacharan Bhaskar.

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Judson, D., Bhaskar, V. & Selvaraj, K. Pre-equalization Schemes for MIMO CC-CDMA Systems Over Frequency-Selective Fading Channels. Wireless Pers Commun 98, 1587–1603 (2018). https://doi.org/10.1007/s11277-017-4936-2

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