scholarly journals Spreading code allocation strategy for downlink multicarrier code division multiple access transmission in a correlated Rayleigh fading channel

2012 ◽  
Vol 14 (6) ◽  
pp. 659-672
Author(s):  
Christelle Garnier ◽  
Yves Delignon ◽  
Hassan El Ghazi ◽  
François Septier
Keyword(s):  
Fading Channel ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Rayleigh Fading ◽  
Rayleigh Fading Channel ◽  
Spreading Code ◽  
Allocation Strategy ◽  
Code Division Multiple

Performance Analysis of Multicarrier Code Division Multiple Access over Rayleigh Fading Channel

2012 ◽  
Vol 457-458 ◽  
pp. 985-988
Author(s):  
Jia Uddin ◽  
Mohammed Faisal ◽  
Md. Facihul Azam ◽  
A.F.M. Muzahidur Rahman
Keyword(s):  
Fading Channel ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Rayleigh Fading ◽  
Multipath Fading ◽  
Rayleigh Fading Channel ◽  
Frequency Diversity ◽  
High Data ◽  
Rate Transmission ◽  
Code Division Multiple

Recently, multi-carrier transmission schemes have been introduced into Code Division Multiple Access (CDMA) systems to gain advantages for high data rate transmission as well as security. Due to pseudorandom code there is no chance to Inter Symbol Interference (ISI). There are different techniques to mitigate multipath fading. One of the method is to transmit identical narrowband direct-sequence (DS) waveforms in parallel over a number of sub-channels using frequency diversity. Implementation this multi-carrier modulation technique in CDMA system is known as multi-carrier CDMA (MC-CDMA). In Rayleigh fading channel, due to multi-carrier modulation, when one subcarrier goes deep fade another subcarrier may remain safe. Therefore it combats multi-path fading and signal can be received in low bit error rate.

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