Performance of Different OCDMA Codes with FWM and XPM Nonlinear Effects

2017 ◽  
Vol 38 (3) ◽  
Author(s):  
Shivani Rana ◽  
Amit Gupta
Keyword(s):  
Phase Modulation ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Cross Correlation ◽  
Nonlinear Effects ◽  
Access System ◽  
Multiple User ◽  
Code Division Multiple ◽  
User Interference ◽  
Multiple Access System

AbstractIn this paper, 1 Gb/s non-linear optical code division multiple access system have been simulated and modeled. To reduce multiple user interference multi-diagonal (MD) code which possesses the property of having zero cross-correlation have been deployed. The MD code shows better results than Walsh-Hadamard and multi-weight code under the nonlinear effect of four-wave mixing (FWM) and cross-phase modulation (XPM). The simulation results reveal that effect of FWM reduces when MD codes are employed as compared to other codes.

scholarly journals Analysis of the Performance of Optical Code-Division Multiple-Access System (OCDMA), Operating with Gold Codes under Nonlinear Effects

2013 ◽  
Vol 05 (02) ◽  
pp. 49-57 ◽  
Author(s):  
Glendo de Freitas Guimarães ◽  
Agliberto Melo Bastos ◽  
Alisson da Conceição Ferreira ◽  
Alex Sander Barros Queiroz ◽  
José Wally Mendonça Menezes ◽  
...  
Keyword(s):  
Code Division Multiple Access ◽  
Multiple Access ◽  
Nonlinear Effects ◽  
Access System ◽  
Gold Codes ◽  
Code Division Multiple ◽  
Multiple Access System

scholarly journals Enhancement of optical code division multiple access system based on 2D ZCC/MD spectral/spatial code

2019 ◽  
Vol 14 (2) ◽  
pp. 661
Author(s):  
Rima Matem ◽  
S. A. Aljunid ◽  
M. N Junita ◽  
C. B. M Rashidi ◽  
Israa Shihab Aqrab
Keyword(s):  
Code Division Multiple Access ◽  
Multiple Access ◽  
Cross Correlation ◽  
Spatial Code ◽  
Two Dimensional ◽  
Effective Power ◽  
One Dimensional ◽  
Access System ◽  
Code Division Multiple ◽  
Multiple Access System

<span>The combination of 1D zero cross correlation (ZCC) and 1D Multi Diagonal (MD) results a new two dimensional hybrid called 2D ZCC/MD code for spectral/spatial OCDMA system. The proposed code aims to enhance the functional qualities of Optical Code Division Multiple Access (OCDMA) and to overcome the limitations of one dimensional codes. In this paper,   2D ZCC/MD is evaluated at data rate; 622Mbps.  A comparison of the proposed 2D ZCC/MD code to 1D Random Diagonal (RD) and 1D Modified Double Weight (MDW) highlight that 2D ZCC/MD  can support  a large number of active  users even at the higher user bit rate. Furthermore, in term of effective power 2D ZCC/MD can achieve lower effective power.</span>

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