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標題: Performance analysis of 2-D O-CDMA codes without the chip-synchronous assumption
作者: Hsu, C.C.
Chang, Y.C.
Yang, G.C.
Chang, C.L.
Kwong, W.C.
關鍵字: carrier hopping prime codes;chip asynchronous;optical code division;multiple access;optical hard-limiting;division multiple-access;optical hard-limiters;beat noise;ocdma;systems;prime codes;coherent;memory;networks;design
Project: Ieee Journal on Selected Areas in Communications
期刊/報告no:: Ieee Journal on Selected Areas in Communications, Volume 25, Issue 6, Page(s) 135-143.
In this paper, the performance of two-dimensional optical codes with cross-correlation functions of at most one, such as the carrier-hopping prime code (CHPC), is analyzed without the traditional chip-synchronous assumption. In addition to the Gaussian approximation method, we apply a combinatorial technique for a more accurate analysis, especially when there exists only a small number of simultaneous users. It is known that an optical hard-limiter can be placed at the front end of a receiver to reduce the effect of multiple-access interference. We also derive the hard-limiting error probability under the chip-asynchronous assumption. Finally, the performance improvement of the CHPC with the hard-limiting and chip-asynchronous assumptions is studied.
ISSN: 0733-8716
DOI: 10.1109/jsac-ocn.2007.024005
Appears in Collections:通訊工程研究所

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