Title :
PN code acquisition in CDMA systems using a MMSE adaptive filter
Author :
El-Tarhuni, Mohamed G. ; Sheikh, Asrar U.
Author_Institution :
Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont., Canada
Abstract :
The capacity of a DS/CDMA system is essentially limited by the performance of the acquisition sub-system; i.e. the maximum number of users that can achieve signal acquisition with a certain degree of reliability. This paper presents a new code acquisition scheme utilizing an FIR adaptive filter that significantly outperforms matched filter based schemes. It is shown that the proposed scheme can achieve the same capacity obtained from the BER criterion
Keywords :
FIR filters; adaptive filters; adaptive signal detection; channel capacity; code division multiple access; error statistics; filtering theory; least mean squares methods; pseudonoise codes; radiofrequency interference; spread spectrum communication; synchronisation; BER criterion; CDMA systems; DS/CDMA system capacity; FIR adaptive filter; MMSE adaptive filter; PN code acquisition; acquisition sub-system; code synchronization; matched filter; multiple access interference; reliability; signal acquisition; AWGN; Adaptive filters; Convergence; Delay effects; Delay estimation; Least squares approximation; Multiaccess communication; Pulse shaping methods; Size control; Steady-state;
Conference_Titel :
Electrical and Computer Engineering, 1998. IEEE Canadian Conference on
Conference_Location :
Waterloo, Ont.
Print_ISBN :
0-7803-4314-X
DOI :
10.1109/CCECE.1998.685605
