Title :
Code acquisition in DS/SS system using periodic property of PN code
Author :
Kim, Tae-Hoon ; Jang, Kyung-Woon ; Park, Yong-Wan ; Choi, Jeong-Hee
Author_Institution :
Willtech Inc., South Korea
Abstract :
An effective code acquisition method using the periodicity property of PN codes and the probability of AWGN is proposed for the DS/SS system. The method of utilizing this periodic property of the spreading signal in a pilot channel is investigated and a simple averaging filter suitable for the AWGN channel is derived. In addition, we describe the method of composing the proposed averaging filter to the conventional acquisition system and the capability of using sequential estimation in a CDMA system with asynchronous mode. The simulation results show that the mean acquisition time is reduced with the proposed acquisition system, especially in the low SNR region
Keywords :
AWGN channels; code division multiple access; filtering theory; land mobile radio; multiuser channels; probability; pseudonoise codes; sequential estimation; spread spectrum communication; synchronisation; AWGN channel; AWGN probability; CDMA system; DS/SS system; PN code; asynchronous mode; averaging filter; code acquisition; low SNR region; mean acquisition time; periodic property; pilot channel; sequential estimation; simulation results; spreading signal; AWGN channels; Additive white noise; Base stations; Correlators; Filters; Gaussian noise; Interference; Mobile communication; Multiaccess communication; Signal to noise ratio;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851541
