Multi-sensor multiuser receiver with soft-decision channel decoder for coded asynchronous CDMA systems

Author

Haifeng, Wang ; Lilleberg, Jorma

Author_Institution

Nokia Mobile Phones, Oulu, Finland

Volume

1

fYear

1999

fDate

1999

Firstpage

637

Abstract

A multiuser receiver based on the processing of signals received at multiple sensors is proposed for coded asynchronous CDMA systems. The advantages of the multi-sensor systems are utilized to improve the signal-to-noise ratio, counteract the effects of fading and suppress the multiuser interference. In order to improve the efficiency of the error control coding, multiuser interference is estimated and subtracted from the received signal, prior to feeding it to the RAKE combiner and a soft-decision channel decoder. Finally, the numerical results are shown for a convolutionally coded asynchronous CDMA system. The conventional and our generalized multistage detectors are compared with different system capacity by simulations

Keywords

array signal processing; channel coding; code division multiple access; convolutional codes; decoding; fading channels; interference suppression; multiuser channels; radio receivers; radiofrequency interference; signal detection; RAKE combiner; SNR; conventional multistage detector; convolutionally coded asynchronous CDMA system; error control coding; fading; generalized multistage detector; multi-sensor multiuser receiver; multiuser interference suppression; received signal; signal processing; signal-to-noise ratio; simulations; soft-decision channel decoder; system capacity; Convolution; Convolutional codes; Decoding; Error correction; Fading; Interference suppression; Multiaccess communication; Sensor systems; Signal processing; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th

Conference_Location

Amsterdam

ISSN

1090-3038

Print_ISBN

0-7803-5435-4

Type

conf

DOI

10.1109/VETECF.1999.797214

Filename

797214