A semi-blind channel equalisation strategy for the UMTS-TDD downlink

M. Hadef, S. Weiss

Research output: Contribution to conferencePaperpeer-review

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Abstract

In this paper, we propose a semi-blind channel equalisation scheme for the downlink time-division duplex (TDD) component of the universal mobile telecommunication system (UMTS). The main two concepts introduced consist of: first exploiting the constant modulus carried by the decoded symbols of all active users; and second making use of the inactive users to load a suitable number of pilot signals. In response to this scenario, a semi-blind equalisation is performed in the data fields, whereby the equaliser weights are updated by minimising a hybrid CM/MSE cost function based on the constant modulus (CM) criterion for all active users and a mean square error (MSE) criterion for both absent users and pilot signals. Computer simulations are used to assess and analyse the channel equalisation strategy in terms of MSE and BER performance over a quasi-static dispersive channel.
Original languageEnglish
Pages262-267
Number of pages6
Publication statusPublished - Dec 2004
Event3rd Workshop on the Internet, Telecommunications, and Signal Processing - Adelaide, Australia
Duration: 20 Dec 200422 Dec 2004

Workshop

Workshop3rd Workshop on the Internet, Telecommunications, and Signal Processing
Abbreviated titleWITSP'2004
CountryAustralia
CityAdelaide
Period20/12/0422/12/04

Keywords

  • semi-blind
  • channel equalisation strategy
  • umts-tdd downlink
  • downlink time-division duplex
  • universal mobile telecommunications system
  • umts
  • active users
  • inactive users
  • pilot signals
  • hybrid cm/mse
  • constant modulus
  • cm
  • mean square error
  • mse`
  • computer simulations
  • quasi-static dispersive channel

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