scholarly journals The Role of Polarization Diversity for MIMO Systems Under Rayleigh-Fading Environments

2006 ◽  
Vol 5 ◽  
pp. 534-536 ◽  
Author(s):  
J. F. Valenzuela-valdes ◽  
M. A. Garcia-fernandez ◽  
A. M. Martinez-gonzalez ◽  
D. Sanchez-Hernandez
Keyword(s):  
Rayleigh Fading ◽  
Mimo Systems ◽  
Polarization Diversity ◽  
Fading Environments

scholarly journals MIMO Self-Encoded Spread Spectrum with Iterative Detection over Rayleigh Fading Channels

2010 ◽  
Vol 2010 ◽  
pp. 1-9 ◽  
Author(s):  
Shichuan Ma ◽  
Lim Nguyen ◽  
Won Mee Jang ◽  
Yaoqing (Lamar) Yang
Keyword(s):  
Fading Channels ◽  
Spread Spectrum ◽  
Rayleigh Fading ◽  
Mimo Systems ◽  
Signal To Noise Ratio ◽  
Multiple Input Multiple Output ◽  
Spatial Diversity ◽  
Iterative Detection ◽  
Channel Fading ◽  
Input Multiple Output

Self-encoded spread spectrum (SESS) is a novel communication technique that derives its spreading code from the randomness of the source stream rather than using conventional pseudorandom noise (PN) code. In this paper, we propose to incorporate SESS in multiple-input multiple-output (MIMO) systems as a means to combat against fading effects in wireless channels. Orthogonal space-time block-coded MIMO technique is employed to achieve spatial diversity, and the inherent temporal diversity in SESS modulation is exploited with iterative detection. Simulation results demonstrate that MIMO-SESS can effectively mitigate the channel fading effect such that the system can achieve a bit error rate of with very low signal-to-noise ratio, from 3.3 dB for a antenna configuration to just less than 0 dB for a configuration under Rayleigh fading. The performance improvement for the case is as much as 6.7 dB when compared to an MIMO PN-coded spread spectrum system.

Evaluation of True Polarization Diversity in Rician-Fading Environments

2012 ◽  
Vol 11 ◽  
pp. 775-778 ◽  
Author(s):  
J. F. Valenzuela-Valdes ◽  
M. F. Manzano ◽  
L. Landesa
Keyword(s):  
Rician Fading ◽  
Polarization Diversity ◽  
Fading Environments
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