scholarly journals Quasi-maximum-likelihood multiple-symbol differential detection for time-varying Rayleigh fading channel

2009 ◽  
Vol 45 (22) ◽  
pp. 1127 ◽  
Author(s):  
Z. Ma ◽  
P. Fan ◽  
E.G. Larsson ◽  
B. Honary
Keyword(s):  
Maximum Likelihood ◽  
Fading Channel ◽  
Rayleigh Fading ◽  
Rayleigh Fading Channel ◽  
Differential Detection ◽  
Time Varying ◽  
Quasi Maximum Likelihood

Performance Comparison of STBC-OFDM with Maximum Likelihood Detection for Rayleigh Fading Channel

2016 ◽  
Vol 26 ◽  
pp. 111-121
Author(s):  
H.A. Bakir ◽  
F. Debbat ◽  
F.T. Bendimerad
Keyword(s):  
Maximum Likelihood ◽  
Fading Channel ◽  
Rayleigh Fading ◽  
Multipath Fading ◽  
Performance Comparison ◽  
Wireless Channel ◽  
Rayleigh Fading Channel ◽  
Fourth Generation ◽  
Combined System ◽  
Ofdm Modulation

The combined system STBC-OFDM has considered an important association to integrate into actual and next wireless system. Such as the Wifi standard, WiMAX standard, the LTE fourth generation of mobile. Which combat the effect of multipath fading channel that limited the performance in wireless communications. In recent years, this association has been a large study to achieve a better performance of BER and designed for the different situation of the wireless channel from slow to fast fading channel, with various parameters of OFDM modulation and under different condition of STBC code. To contribute in this axis of research, we present a comparative study of the simulation result for STBC-OFDM. The first results are the comparison between three schemes of STBC (Alamouti code, Orthogonal STBC, Non-Orthogonal STBC) associated with OFDM. The second results are the comparison between three schemes when applied OFDM in different parameters and also when these codes used without OFDM modulation. The channel considered across simulation is Rayleigh fading channel that presented a real situation of the wireless environment, the Maximum Likelihood (ML) is used for detection the data that encoded in the first. The performance of three schemes is evaluated by BER (Bit Error Rate) versus the different values of SNR (Signal Noise Ratio).

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