Improved iterative parallel interference cancellation receiver for future wireless DS-CDMA systems

Authors:
Simone Morosi;Romano Fantacci;Andrea Bernacchioni
Affiliations:
Electronics and Telecommunication Department, University of Florence, Firenze, Italy;Electronics and Telecommunication Department, University of Florence, Firenze, Italy;Electronics and Telecommunication Department, University of Florence, Firenze, Italy
Venue:
EURASIP Journal on Applied Signal Processing
Year:
2005

Citing 2
Cited 1

Iterative multiuser detection for coded CDMA signals in AWGN and fading channels

IEEE Journal on Selected Areas in Communications
A low-complexity iterative multiuser receiver for turbo-coded DS-CDMA systems

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Another Approach for Partial Parallel Interference Cancellation

Wireless Personal Communications: An International Journal

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Abstract

We present a new turbo multiuser detector for turbo-coded direct sequence code division multiple access (DS-CDMA) systems. The proposed detector is based on the utilization of a parallel interference cancellation (PIC) and a bank of turbo decoders. The PIC is broken up in order to perform interference cancellation after each constituent decoder of the turbo decoding scheme. Moreover, in the paper we propose a new enhanced algorithm that provides a more accurate estimation of the signal-to-noise-plus-interference-ratio used in the tentative decision device and in the MAP decoding algorithm. The performance of the proposed receiver is evaluated by means of computer simulations for medium to very high system loads, in AWGN and multipath fading channel, and compared to recently proposed interference-cancellation-based iterative MUD, by taking into account the number of iterations and the complexity involved. We will see that the proposed receiver outperforms the others especially for highly loaded systems.