Blind adaptive space-time receiving and transmitting diversities for multiuser DS-CDMA systems

Jaeyoung Kwak, I. Tai Lu

Research output: Contribution to conferencePaperpeer-review

Abstract

Blind adaptive space-time processing techniques are developed for both uplink reception and downlink transmission in multiuser TDD DS-CDMA systems to overcome multipath fading effect and multiple access interference. The system consists of a space-time array, a decorrelator, and a weight-adapter. For uplink reception, a hybrid combination of constant modulus algorithm and decision-directed algorithm approach is employed for blind adaptation. For multi-input-multi-output channel estimation, minimum mean squared error estimation is made using respread sequences of the decision symbols as references. For downlink multiuser transmission, the generalized zero-forcing approach is developed for pre-equalization and pre-interference-cancellation.

Original languageEnglish (US)
Pages924-928
Number of pages5
StatePublished - 1999
EventIEEE Military Communications Conference (MILCOM 1999) - Atlantic City, NJ, USA
Duration: Oct 31 1999Nov 3 1999

Other

OtherIEEE Military Communications Conference (MILCOM 1999)
CityAtlantic City, NJ, USA
Period10/31/9911/3/99

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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