Title :
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
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;
Conference_Titel :
Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-5435-4
DOI :
10.1109/VETECF.1999.797214
