Journal of Guangxi Normal University(Natural Science Edition) ›› 2016, Vol. 34 ›› Issue (2): 28-34.doi: 10.16088/j.issn.1001-6600.2016.02.005

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A Novel Two-dimensional Code Design and Performance Analysisfor SAC-OCDMA System

ZHANG Xiurong1, LI Chuanqi1, LU Ye1, ZHANG Dongchuang1, KONG Yibu1, FU Xueqian2, FAN Qingbin1   

  1. 1. College of Electronic Engineering, Guangxi Normal University, Guilin Guangxi 541004;
    2. Department of Electrical Engineering,Tsinghua University,Beijing 100084
  • Received:2016-01-18 Online:2016-06-25 Published:2018-09-14

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Abstract: Based on multi-diagonal(MD)code and the cyclic-shift unit matrix, a new two-dimensional spectral/spatial code family with zero cross correlation named two dimensional cyclic shift multi-diagonal(2D-CSMD)code is proposed for Spectral Amplitude Code-Optical Code Division Multiple Access(SAC-OCDMA). By taking into account the effects of phase-induced intensity noise (PIIN), hot noise and thermal noise, the formula of signal to noise ratio (SNR) and bit error ratio (BER) are deduced and the BER performances of SAC-OCDMA system is analyzed and simulated. Theoretical analysis show that 2D-CSMD code family has a larger code capacity and a lower BER in SAC-OCDMA system compared with 2D-MD code family with the same size matrix. The simulations show that 2D-CSMD code has a better performance than 2D-MD code under the same conditions, and an ideal eye diagram of 2D-CSMD in the simulation is generated.

Key words: SAC-OCDMA system, 2D-CSMD code, cyclic-shift unit matrix, BER

CLC Number: 

  • TN929.11
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