Title :
Blind spreading factor detection for DS-CDMA
Author :
Juntti, Markku ; Pajukoski, Kari
Author_Institution :
Centre for Wireless Commun., Oulu Univ., Finland
Abstract :
In WCDMA systems, the spreading factor (SF) of a user is allowed change as a new radio frame (length 10 ms) starts. The receiver does not know in advance the SF a user is really using. In this paper, techniques to detect the used spreading factor are studied. The problem is formulated as a general SF detection problem for a DS-CDMA systems. The optimal detector as well as the suboptimal autocorrelation based detector were studied. It was found that the SF detection can be devised rather reliably by a simple autocorrelation based detection algorithm
Keywords :
AWGN; broadband networks; cellular radio; code division multiple access; correlation methods; multiuser channels; optimisation; radio networks; radiofrequency interference; signal detection; spread spectrum communication; AWGN; DS-CDMA systems; WCDMA systems; additive white Gaussian noise; autocorrelation based detection algorithm; blind spreading factor detection; cellular radio; fading channels; maximum a posteriori detection; multiple access interference; optimal detector; radio frame; suboptimal autocorrelation based detector; AWGN; Autocorrelation; Detection algorithms; Detectors; Interference; Multiaccess communication; Multiuser detection; Receivers; Spread spectrum communication; Wireless communication;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2000. PIMRC 2000. The 11th IEEE International Symposium on
Conference_Location :
London
Print_ISBN :
0-7803-6463-5
DOI :
10.1109/PIMRC.2000.881647
