A transmit antenna selection scheme for STBC MIMO OFDM systems with imperfect channel knowledge

2007 ◽  
Author(s):  
K. Ghanem ◽  
Tayeb. A. Denidni ◽  
F. Ghanem
Keyword(s):  
Antenna Selection ◽  
Ofdm Systems ◽  
Transmit Antenna Selection ◽  
Selection Scheme ◽  
Channel Knowledge ◽  
Mimo Ofdm ◽  
Imperfect Channel Knowledge

A Novel Transmit Diversity Technique for MIMO System

2012 ◽  
Vol 468-471 ◽  
pp. 355-359
Author(s):  
You Yan Zhang ◽  
Shu Yue Hong
Keyword(s):  
Likelihood Ratio ◽  
Mimo Systems ◽  
Antenna Selection ◽  
Mimo System ◽  
Signal To Noise Ratio ◽  
Gray Code ◽  
Transmit Antenna Selection ◽  
Selection Scheme ◽  
Log Likelihood ◽  
Log Likelihood Ratio

The antenna diversity based on log-likelihood ratio (LLR) is better than that based on signal-to-noise ratio (SNR) in bit error rate performance for MIMO systems. Thus in this paper, we present a novel transmit antenna selection scheme based on bit log-likelihood ratio when the Alamouti code is employed .Then the BER expressions of application based on Bit-LLR (BLLR) for MPSK and MQAM modulation with Gray code are derived. The simulation results show that the new scheme based on BLLR is superior to SNR. With the increase of the transmit antennas, the performance of system is improved significantly. Furthermore, the diversity order is the same as that of the full complexity systems.

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