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An Efficient Code-Timing Estimator for DS-CDMA Systems over Resolvable Multipath Channels

Abstract

We consider the problem of training-based code-timing estimation for the asynchronous direct-sequence code-division multiple-access (DS-CDMA) system. We propose a modified large-sample maximum-likelihood (MLSML) estimator that can be used for the code-timing estimation for the DS-CDMA systems over the resolvable multipath channels in closed form. Simulation results show that MLSML can be used to provide a high correct acquisition probability and a high estimation accuracy. Simulation results also show that MLSML can have very good near-far resistant capability due to employing a data model similar to that for adaptive array processing where strong interferences can be suppressed.

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Correspondence to Jianhua Liu.

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Liu, J., Li, J. An Efficient Code-Timing Estimator for DS-CDMA Systems over Resolvable Multipath Channels. EURASIP J. Adv. Signal Process. 2005, 680571 (2005). https://doi.org/10.1155/ASP.2005.670

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Keywords and phrases

  • DS-CDMA
  • synchronization
  • code timing
  • multipath channels
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