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O-CDMA Code Acquisition Algorithm Based on Magnitude and Sign of Correlation Values  

Chong, Da-Hae (성균관대학교 정보통신공학부)
Yoon, Tae-Ung (성균관대학교 정보통신공학부)
Lee, Young-Po (성균관대학교 정보통신공학부)
Lee, Young-Yoon (성균관대학교 정보통신공학부)
Song, Chong-Han (성균관대학교 정보통신공학부)
Park, So-Ryoung (가톨릭대학교 정보통신전자공학부)
Yoon, Seok-Ho (성균관대학교 정보통신공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.6C, 2009 , pp. 649-655 More about this Journal
Abstract
Mean acquisition time (MAT) is the most important performance measure for code acquisition systems, where a shorter MAT implies a better code acquisition performance. Keshavarzian and Salehi proposed the multiple-shift (MS) algorithm for code acquisition in optical code division multiple access (O-CDMA) systems. Performing two steps acquisition, the MS algorithm has a shorter MAT than that of the conventional serial-search (SS) algorithm. In this paper, we propose a rapid code acquisition algorithm for O-CDMA systems. By using an efficient combination of local signals, correlation value, and the sign of correlation value, the proposed algorithm can provide a shorter MAT compared with that of the MS algorithm. The simulation results show that the proposed algorithm presents a shorter MAT than that of the MS algorithm.
Keywords
Optical Code Division Multiple Access (O-CDMA); Code Acquisition; Optical Orthogonal Code (OOC); Mean Acquisition Time (MAT); Multiple Access Interference (MAI);
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