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  • Research Article
  • Open Access

Coherent Code Tracking for Spatial Transmit Diversity DS-CDMA Systems

EURASIP Journal on Advances in Signal Processing20052005:163421

  • Received: 6 February 2004
  • Published:


Spatial transmit diversity schemes are now well integrated into third-generation cellular mobile communication system specifications. When DS-CDMA-based technology is deployed in typical macro- and microcell environments, multipath diversity and spatial diversity may be exploited simultaneously by a 2D RAKE receiver. The work presented in this paper focuses on taking advantage of spatial transmit diversity in synchronising the 2D RAKE structure. We investigate the use of coherent and noncoherent techniques for tracking the timing parameters of each multipath component. It is shown that both noncoherent and coherent techniques benefit from transmit diversity. Additionally the performance gap between these two techniques increases with the number of antennas.

Keywords and phrases:

  • 2D RAKE
  • transmit diversity
  • coherent delay-locked loop

Authors’ Affiliations

DSP Enabled Communications Group, Department of Electronic and Electrical Engineering, University of Strathclyde, Scotland, Glasgow, G1 1XW, UK


© Rice et al. 2005