Multi-user receiver based on co-channel interference cancellation for multilevel FSK/FH-spread spectrum multiple access system

2002 ◽  
Author(s):  
R. Kohno ◽  
T. Mabuchi ◽  
H. Imai
Keyword(s):  
Spread Spectrum ◽  
Interference Cancellation ◽  
Multiple Access ◽  
Access System ◽  
Channel Interference ◽  
Multiple Access System

The CDMA Spread-Spectrum Cell Mobile Communication Uplink System with Cooperative Diversity

2014 ◽  
Vol 989-994 ◽  
pp. 3540-3543
Author(s):  
Han Cheng Liao
Keyword(s):  
Spread Spectrum ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Cooperative Diversity ◽  
Mobile Terminal ◽  
Spatial Diversity ◽  
Access System ◽  
Cooperative Scheme ◽  
Code Division Multiple ◽  
Multiple Access System

In this paper, physical layer cooperative communication of code division multiple access system is explored. Many mobile terminals relay signals for each other so as to achieve spatial diversity. The cooperative scheme of the mobile terminal is well designed. The uplink system model, as well as the receiving structure is given. The performance advantage of such system is clearly indicated through simulation.

A New Construction of Optical Zero-Correlation Zone Codes

2018 ◽  
Vol 39 (3) ◽  
pp. 359-368 ◽  
Author(s):  
Benattou Fassi ◽  
Abdelmalik Taleb-Ahmed
Keyword(s):  
Code Division Multiple Access ◽  
Multiple Access ◽  
Hadamard Matrix ◽  
Access System ◽  
Zero Correlation ◽  
Channel Interference ◽  
New Construction ◽  
Zero Correlation Zone ◽  
Code Division Multiple ◽  
Multiple Access System

Abstract A new method for constructing optical zero-correlation zone (OZCZ) codes based on the Hadamard matrix and the concatenation operation is proposed. The most important property of the obtained codes is that the periodic correlation function of the proposed codes is zero for the phase shifts within the zero-correlation zone. The structure of the proposed OZCZ code is simple and their construction is more flexible. The proposed code is expected to be useful for reducing co-channel interference in optical code division multiple access system.

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