A robust pilot-assisted equaliser for the partially loaded downlink UMTS TDD

M. Hadef, A. Daas, S. Weiss, Josh Reiss, Xiaodong Chen

Research output: Contribution to conferencePaperpeer-review


In this paper, we propose a robust pilot-assisted equalisation strategy for the partially loaded time-division duplex (TDD) component of the universal mobile telecommunications system (UMTS). In addition to training-based equalisation performed using the midamble of a data packet, some of the unused preading codes are exploited to upload pilots in order to perform an additional semi-blind adaptation over the payload of a packet. The latter ensures continuous
adaptation and better tracking performance. The affine projection concept along with the concurrent constant modulus algorithm (CMA) and decision-directed (DD) mode are implemented to update the equaliser weights. Computer simulations are used to assess the performance of the proposed adaptation strategy over various UMTS TDD time bursts
Original languageEnglish
Number of pages5
Publication statusPublished - 2007
Event15th European Signal Processing Conference - Poznan , Poland
Duration: 3 Sep 20077 Sep 2007


Conference15th European Signal Processing Conference
Abbreviated titleEUSIPCO 2007


  • affine projection scheme
  • concurrent adaptation
  • downlink UMTS TDD
  • constant modulus
  • decision directed
  • spectrum efficiency


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