Coherent code tracking for spatial transmit diversity DS-CDMA systems

G.W. Rice, I.G. Stirling, R.W. Sewart

Research output: Contribution to journalArticlepeer-review


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.
Original languageEnglish
Pages (from-to)2739-2747
Number of pages8
JournalEURASIP Journal on Advances in Signal Processing
Issue number16
Publication statusPublished - 2005


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


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