Bit-error-rate analysis of an ultrashort-pulse code-division multiple-access communication system

1999 ◽  
Author(s):  
Rajappa Papannareddy ◽  
Andrew M. Weiner
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Communication System ◽  
Ultrashort Pulse ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Rate Analysis ◽  
Code Division Multiple

Spectral Efficiency of Phase Encoding OCDMA Systems

2013 ◽  
Vol 760-762 ◽  
pp. 133-136
Author(s):  
Xiao Gang Chen ◽  
Chao Jiang ◽  
Zhao Xu Liu ◽  
De Xiu Huang
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Spectral Efficiency ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Spectral Phase ◽  
Code Length ◽  
Phase Encoding ◽  
Bandwidth Limitation ◽  
Code Division Multiple

The spectral efficiency and bit-error-rate (BER) of phase encoding optical code division multiple access (OCDMA) systems is evaluated, coherent time-spreading (TS) and spectral phase encoding (SPE) OCDMA systems are considered. The results indicate that SPE-OCDMA has better tolerance to performance degradation due to receivers bandwidth limitation than TS-OCDMA system, while for the practical en/decoders with implementable longest code length, TS-OCDMA can yield a spectral efficiency advantage over SPE-OCDMA systems.

Behavior study of EDEU optical code for FE-OCDMA system

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Abdelkader Bouarfa
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Code Length ◽  
Behavior Study ◽  
Frequency Encoding ◽  
Unit Code ◽  
Code Division Multiple

Abstract The increase in the cardinality of the frequency encoding-optical code division multiple access (OCDMA) system directly affects the length of the optical code, which leads us to find a less expensive solution. In this work, I propose an improved version of the diagonal eigenvalue Unit code (DEU) called Enhanced diagonal eigenvalue Unit code (EDEU) that is much easier in terms of construction and short in code length compared to the DEU code. The results found showed that the performance of the EDEU code exceeds the DEU code in terms of bit error rate (BER), and allowed us to multiplex about 15 more users when using the EDEU code compared to the system using the DEU code. As a result, the EDEU code is very suitable for use in access and OCDMA systems and it can be seen as a strong competitor to existing codes.

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