Self-homodyne optical code division multiple access (CDMA) system for LAN application

1995 ◽  
Author(s):  
G. C. Gupta ◽  
Deepak G. Uttamchandani
Keyword(s):  
Code Division Multiple Access ◽  
Multiple Access ◽  
Cdma System ◽  
Code Division Multiple

scholarly journals 2 Performance Evaluation of Code Division Multiple Access (CDMA) in terms of Power Measurement and Reduction

2011 ◽  
Vol 1 (1) ◽  
pp. 4
Author(s):  
Syed Rizwan-ul- Hasan ◽  
Shakil Ahmed
Keyword(s):  
Performance Evaluation ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Average Power ◽  
Power Measurement ◽  
Cdma System ◽  
Power Ratio ◽  
Ratio Measurement ◽  
Simulation Results ◽  
Code Division Multiple

 In this research paper the performance of the CDMA system has been analyzed with respect to PAPR (Peak to Average Power Ratio) measurement and its reduction. Simulation results verify that high peaks degrade the performance of CDMA, application of codes reduced high peaks and PAPR is a good measure for CDMA.

scholarly journals The Channel Shortening comparison between OFDM & MC-CDMA System over an ADSL Channel using a Water-filling

2019 ◽  
Vol 9 (5) ◽  
pp. 3695
Author(s):  
Bouasria Fatima
Keyword(s):  
System Performance ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Digital Transmission ◽  
Cdma System ◽  
Channel Shortening ◽  
Multiple Paths ◽  
Water Filling ◽  
Cdma Systems ◽  
Code Division Multiple

<p>In this paper our objective focuses on the development of digital transmission techniques in order to solve the problem of Inter-Symbol Interference (ISI) due to multiple paths and the improvement of Multi-Carrier Code Division Multiple Access (MC-CDMA) system performance. The both algorithm: MERRY algorithm (Multicarrier Equalization by Restoration of Redundancy) called TEQ (Time domain EQualizer) and the power allocation method to allocate appropriate power to each user (Water-filling technique (WF)) [1] is used. Finally, the numerical results show that combining Water Filling with TEQ technique allows to reduce the ISI for MC-CDMA systems.</p>

Simulation of CDMA System Used in 3G Mobile Communication Based on Communication Materials

2012 ◽  
Vol 460 ◽  
pp. 70-73
Author(s):  
Bing Gang Xiao ◽  
Zhi Yi Xie ◽  
Peng Ye
Keyword(s):  
Communication Technology ◽  
Mobile Communication ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Simulation Method ◽  
Base Station ◽  
Cdma System ◽  
Theoretical Conclusion ◽  
Whole Process ◽  
Code Division Multiple

CDMA is the abbreviation of Code Division Multiple Access which is a kind of new and mature wireless communication technology. The CDMA system Used in 3G mobile communication is simulated using the MATLAB software here. A CDMA2000 base station transmitter is established using the Simulink tools. Each module is initialized in order to achieve the simulation of a base station transmitter of the cdma2000. The whole process of producing singals is simulated by the fundamental reverse channel. The simulation results are compared with theoretical conclusion, proving that the simulation method is very effective.

Performance Analysis of SAC Optical PPM-CDMA System-Based Interference Rejection Technique

2016 ◽  
Vol 37 (1) ◽  
Author(s):  
N. Alsowaidi ◽  
Tawfig Eltaif ◽  
M. R. Mokhtar
Keyword(s):  
Interference Cancellation ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Multiple Access Interference ◽  
Spectral Amplitude ◽  
Cdma System ◽  
Pulse Position Modulation ◽  
Interference Rejection ◽  
Spectral Amplitude Coding ◽  
Code Division Multiple

AbstractIn this paper, we aim to theoretically analyse optical code division multiple access (OCDMA) system that based on successive interference cancellation (SIC) using pulse position modulation (PPM), considering the interference between the users, imperfection cancellation occurred during the cancellation process and receiver noises. Spectral amplitude coding (SAC) scheme is used to suppress the overlapping between the users and reduce the receiver noises effect. The theoretical analysis of the multiple access interference (MAI)-limited performance of this approach indicates the influence of the size of

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