Performance analysis of 2D asynchronous hard-limiting optical code-division multiple access system through atmospheric scattering channel

Yaqin Zhao; Xin Zhong; Di Wu; Ye Zhang; Guanghui Ren; Zhilu Wu

doi:10.1117/12.2027680

24 September 2013 Performance analysis of 2D asynchronous hard-limiting optical code-division multiple access system through atmospheric scattering channel

Yaqin Zhao, Xin Zhong, Di Wu, Ye Zhang, Guanghui Ren, Zhilu Wu

Author Affiliations +

Proceedings Volume 8871, Satellite Data Compression, Communications, and Processing IX; 887104 (2013) https://doi.org/10.1117/12.2027680
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

Optical code-division multiple access (OCDMA) systems usually allocate orthogonal or quasi-orthogonal codes to the active users. When transmitting through atmospheric scattering channel, the coding pulses are broadened and the orthogonality of the codes is worsened. In truly asynchronous case, namely both the chips and the bits are asynchronous among each active user, the pulse broadening affects the system performance a lot. In this paper, we evaluate the performance of a 2D asynchronous hard-limiting wireless OCDMA system through atmospheric scattering channel. The probability density function of multiple access interference in truly asynchronous case is given. The bit error rate decreases as the ratio of the chip period to the root mean square delay spread increases and the channel limits the bit rate to different levels when the chip period varies.

Citation Download Citation

Yaqin Zhao, Xin Zhong, Di Wu, Ye Zhang, Guanghui Ren, and Zhilu Wu "Performance analysis of 2D asynchronous hard-limiting optical code-division multiple access system through atmospheric scattering channel", Proc. SPIE 8871, Satellite Data Compression, Communications, and Processing IX, 887104 (24 September 2013); https://doi.org/10.1117/12.2027680

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