Title :
Double-dwell serial search algorithm with multi-level threshold values in DS-CDMA systems
Author :
Lee, Chaehag ; Kim, Jaeseok ; Lee, Seongjoo ; Jun, Sunghwan
Author_Institution :
Dept. of Electr. & Comput. Eng., Yonsei Univ., Seoul, South Korea
Abstract :
In this paper, a double-dwell serial search algorithm having multi-level threshold values is proposed to mitigate the possible performance degradation caused by the use of single pair thresholds in a PN code acquisition system. We present a mathematical model and performance analysis of the proposed algorithm in DS-CDMA systems. We also compare the mean code acquisition time of our algorithm with that of a conventional scheme under IMT-2000 channel models. It is shown that our scheme outperforms the conventional method having one pair of threshold values by 0.2-0.3 sec with respect to the mean code acquisition time
Keywords :
code division multiple access; mobile radio; pseudonoise codes; spread spectrum communication; telecommunication channels; DS-CDMA systems; IMT-2000 channel models; PN code acquisition system; double-dwell serial search algorithm; mean code acquisition time; multi-level threshold values; performance degradation; pseudonoise codes; single pair thresholds; Degradation; Electronic switching systems; Hardware; Interference cancellation; Mathematical model; Multiaccess communication; Performance analysis; Phase detection; Search methods; Signal to noise ratio;
Conference_Titel :
Communication Technology Proceedings, 2000. WCC - ICCT 2000. International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-6394-9
DOI :
10.1109/ICCT.2000.889258
