Title :
Improved iterative parallel interference cancellation receiver for DS-CDMA 3G systems
Author :
Morosi, Simone ; Del Re, Enrico ; Fantacci, Romano ; Bernacchioni, Andrea
Author_Institution :
Dept. of Electron. & Telecommun., Florence Univ., Firenze, Italy
Abstract :
This paper presents a turbo multiuser detector for turbo-coded DS-CDMA systems, based on the utilization of a PIC and a bank of turbo decoders, in which the PIC performs interference cancellation after each constituent decoder of the turbo decoding scheme. Moreover, we propose a new enhanced estimator of the signal-to-noise-plus-interference-ratio used in the decision device and in the MAP decoding algorithm. By means of computer simulations, we show that the proposed receiver outperforms other similar schemes for medium to very high system loads, in AWGN and multipath fading channel.
Keywords :
3G mobile communication; AWGN; code division multiple access; fading channels; interference suppression; iterative methods; maximum likelihood decoding; multipath channels; multiuser detection; radio receivers; radiofrequency interference; spread spectrum communication; turbo codes; AWGN; DS-CDMA 3G system; MAP decoding algorithm; additive white Gaussian noise; code division multiple access; constituent decoder; improved iterative parallel interference cancellation receiver; multipath fading channel; signal-to-noise-plus-interference-ratio estimator; turbo decoders bank; turbo decoding scheme; turbo multiuser detector; AWGN; Computer simulation; Detectors; Interference cancellation; Iterative decoding; Matched filters; Multiaccess communication; Multiple access interference; Multiuser detection; Turbo codes;
Conference_Titel :
Wireless Communications and Networking, 2003. WCNC 2003. 2003 IEEE
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-7700-1
DOI :
10.1109/WCNC.2003.1200487
