Design and simulations of a spectral efficient optical code division multiple access scheme using alternated energy differentiation and single-user soft-decision demodulation

OPTICS COMMUNICATIONS

卷:383

Article

Garba, Aminata A.¹ 

[1] Carnegie Mellon Univ, Dept Elect & Comp Engn, Pittsburgh, PA 15213 USA

关键词: Optical CDMA;    Spectral efficiency;    Amplitude alternation;    Energy differentiation soft-decision;    demodulation;   

DOI  :  10.1016/j.optcom.2016.09.016

来源: Elsevier

【 摘 要 】

This paper presents a new approach to optical Code Division Multiple Access (CDMA) network transmission scheme using alternated amplitude sequences and energy differentiation at the transmitters to allow concurrent and secure transmission of several signals. The proposed system uses error control encoding and soft-decision demodulation to reduce the multi-user interference at the receivers. The design of the proposed alternated amplitude sequences, the OCDMA energy modulators and the soft decision, single-user demodulators are also presented. Simulation results show that the proposed scheme allows achieving spectral efficiencies higher than several reported results for optical CDMA and much higher than the Gaussian CDMA capacity limit. (C) 2016 The Authors. Published by Elsevier B.V.

【 授权许可】

Free