High rate open-loop MIMO multi-user downlink transmission scheme based on blind precoding quasi-orthogonal space time block code

2009 ◽  
Vol 3 (11) ◽  
pp. 1757
Author(s):  
Y. Han ◽  
S.H. Ting ◽  
Y.L. Guan
Keyword(s):  
Block Code ◽  
Space Time ◽  
Open Loop ◽  
High Rate ◽  
Time Block ◽  
Transmission Scheme ◽  
Downlink Transmission ◽  
Space Time Block Code ◽  
Orthogonal Space

Combined Beamforming with Orthogonal Space Time Block Code for MIMO-OFDM with Simple Feedback

2016 ◽  
Vol 4 (3) ◽  
pp. 580
Author(s):  
Hala M. Abd Elkader ◽  
Gamal M. Abdel-Hamid ◽  
Adly Tag El-Dien ◽  
Asmaa A. Nassif
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Multiple Input Multiple Output ◽  
Block Code ◽  
Space Time ◽  
Ofdm System ◽  
Time Block ◽  
Downlink Transmission ◽  
Space Time Block Code ◽  
Orthogonal Space ◽  
Mimo Ofdm

<p>In this paper, we introduce a proposed scheme to enhance the performance of orthogonal space time block code (OSTBC) with four time slots and two antennas by combing OSTBC with random beamforming to can use it in the downlink transmission for a mobile system.  Multiple-input multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) system has been recognized as one of the most promising techniques to achieve a good service and increase data rate in the next generation (4&amp;5G) broadband wireless communications. So, we apply Space time block code (STBC) for MIMO-OFDM system with linear decoding.  Also, we perform STBC with beamforming for MIMO-OFDM system to improve the performance of a system. Simulation results show that the beamforming improves bit error rate (BER) performance of OSTBC and STBC-OFDM for different types of modulation and diversity.</p>

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