Full Diversity Full Rate Cyclotomic Orthogonal Space-Time Block Codes for MIMO Wireless Systems

2012 ◽  
Vol E95.B (10) ◽  
pp. 3349-3352 ◽  
Author(s):  
Hua JIANG ◽  
Kanglian ZHAO ◽  
Yang LI ◽  
Sidan DU
Keyword(s):  
Wireless Systems ◽  
Block Codes ◽  
Space Time ◽  
Time Block ◽  
Space Time Block Codes ◽  
Full Diversity ◽  
Orthogonal Space ◽  
Full Rate

Precoding-Based Full Rate Quasi-Orthogonal Space-Time Block Codes

2011 ◽  
Vol 30 (5) ◽  
pp. 1163-1166 ◽  
Author(s):  
Zheng-wei Gong ◽  
Tai-yi Zhang ◽  
Rui-ping Zhang
Keyword(s):  
Block Codes ◽  
Space Time ◽  
Time Block ◽  
Space Time Block Codes ◽  
Orthogonal Space ◽  
Full Rate

Performance Evaluation of Full Diversity QOSTBC MIMO Systems with Multiple Receive Antenna

2013 ◽  
pp. 274-284
Author(s):  
Hardip K. Shah ◽  
Tejal N. Parmar ◽  
Nikhil Kothari ◽  
K. S. Dasgupta
Keyword(s):  
Communication Systems ◽  
Mimo Systems ◽  
Block Code ◽  
Block Codes ◽  
Space Time ◽  
Least Square ◽  
Time Block ◽  
Space Time Block Codes ◽  
Full Diversity ◽  
Full Rate

Multipath fading is inherent in wireless communication systems. Diversity is the technique which takes advantage of multipath to mitigate the effect of fading and increase signal strength. Space Time Block codes (STBC) are used in MIMO systems to improve the performance by maximizing transmit and/or receive diversity. Among different schemes based on STBC, Quasi Orthogonal Space Time Block Code (QOSTBC) is able to achieve full rate transmission for more than two transmit antennas. Constellation Rotation QOSTBC (CR-QOSTBC) achieves full diversity and improves performance further along with full rate, to overcome the limitation of QOSTBC, which is unable to maintain orthogonality amongst the codes transmitted by different antennas. Higher diversity can be achieved by increasing uncorrelated paths between transmitter and receivers using higher number of receive antennas. This paper examines improvement in BER with reference to a number of receive antennas. Simulations were carried out under ideal as well as realistic environments, using least square technique with four antennas at transmitter side and variable receive antennas. Results of simulations presented in this paper indicate performance improvement of CR-QOSTBC over QOSTBC in flat fading channel environment. Simulation results also show performance degradation in BER when channel is estimated at the receiver.

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