Abstract

Multiple-user interference estimation and cancellation techniques are proposed for synchronous optical code-division multiple-access (CDMA) communication systems. At the receiving end the multiple-user interference is estimated and is used to adapt a threshold level that is placed after an optical correlator. The special properties of the modified prime sequence codes are utilized in the estimation process. Four methods for adapting the threshold are proposed in this paper. The performance of the above system is analyzed and the bit error rates of the four adaptation schemes are compared to each other and to that of the system without cancellation. Our results reveal that the proposed system is very efficient in eliminating the effect of the multiple-user interference. Moreover, it is shown that the error floor which distinguishes the traditional systems is taken away under the proposed schemes.

[IEEE ]

Approach to Interference Cancellation in DS-CDMA Optical Networks

Anicet Okassa-M’foubat, Iyad Dayoub, Jean-Michel Rouvaen, Walaa Hamouda, and Awad Mazen
J. Opt. Commun. Netw. 1(3) 204-212 (2009)

On the study of a quasi-synchronous CDMA-VLC system with two channels

Danyang Chen, Zhonggui Ma, Huimin Lu, Lifang Feng, and Jianping Wang
Opt. Express 27(21) 30249-30261 (2019)

Impact of Light Reflection on Indoor Wireless Optical CDMA Systems

Jiang Liu, Zhenni Pan, Wasinee Noonpakdee, and Shigeru Shimamoto
J. Opt. Commun. Netw. 4(12) 989-996 (2012)

Performance evaluation of an IMDD optical OFDM-CDMA system

Sofien Mhatli, Hichem Mrabet, Elias Giacoumidis, and Iyad Dayoub
Appl. Opt. 57(7) 1569-1574 (2018)

Design of a Hybrid Multirate Asynchronous O-CDMA System: Performance, Spectral Efficiency, and Throughput Analyses

Han-Chun Chen, Min-Kuan Chang, Guu-Chang Yang, and Wing C. Kwong
J. Opt. Commun. Netw. 7(11) 1034-1048 (2015)