Blind chip-rate equalisation for DS-CDMA downlink receiver

Weiss, S. and Hadef, M. and Konrad, M. and Rupp, M. (2003) Blind chip-rate equalisation for DS-CDMA downlink receiver. In: 37th Asilomar Conference on Signals, Systems and Computers, 2003-11-09 - 2003-11-12, Pacific Grove, California. (http://dx.doi.org/10.1109/ACSSC.2003.1292195)

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Abstract

A dispersive channel in the DS-CDMA downlink destroys the orthogonality of the synchronous users' spreading sequences. In this paper, we aim to reestablish this orthogonality blindly by means of a common chip-level equaliser. The adaptation algorithm is based on a constant modulus criterion forcing the various user symbols onto a constant modulus, for which a stochastic gradient descent algorithm is derived. This algorithm is structurally similar to a multiple error filtered-X LMS type approach, whereby the equaliser input CM update is replaced by a spreading code filtered version. Various simulations demonstrating the algorithm's convergence and noise performance are presented.

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  Item type:	Conference or Workshop Item(Paper)
  ID code:	38346
  Dates:	Date Event 2003 Published
  Keywords:	multiuser detection, LMS , signals, algorithm, Electrical engineering. Electronics Nuclear engineering
  Subjects:	Technology > Electrical engineering. Electronics Nuclear engineering
  Department:	Faculty of Engineering > Electronic and Electrical Engineering
  Depositing user:	Pure Administrator
  Date deposited:	08 Mar 2012 16:39
  Last modified:	01 Oct 2018 09:06
  URI:	https://strathprints.strath.ac.uk/id/eprint/38346