Distributed Orthogonal and Quasi-Orthogonal Space-Time Block Code with Embedded AAF/DAF Matrix Elements in Wireless Relay Networks with Four Relays

2013 ◽  
Vol 75 (2) ◽  
pp. 1187-1198 ◽  
Author(s):  
Shu-Ming Tseng ◽  
Che-Ying Liao
2012 ◽  
Vol 433-440 ◽  
pp. 6014-6018
Author(s):  
Xue Yi Zhang ◽  
Jie Sun

A kind of quasi-orthogonal space time block code for amplify-and-forward relay networks is analyzed in this paper. At the source, 4 single-antenna users transmit the quasi-orthogonal space time block code matrix. At the relay node, fast maximum-likelihood decoding algorithm is adopted and the decoded symbols are then encoded into quasi-orthogonal code which is transmitted through transmit antenna. At the destination, pair-wise decoding algorithm is utilized. Finally we compare the performance of the quasi-orthogonal space time block code in relay networks with that of the quasi-orthogonal space time block code in traditional communication system. Simulation results show that at the given BER of 10-3, the new code can provide about gain of 4dB and 1 dB comparing with that for the traditional quasi-orthogonal code, respectively. And at the given BER of 10-5, the new code can provide about gain of 4.6dB and 2.6dB comparing with that for the old quasi-orthogonal code, respectively.


2013 ◽  
Vol 7 (16) ◽  
pp. 1825-1835 ◽  
Author(s):  
Hoc Phan ◽  
Trung Q. Duong ◽  
Theodoros A. Tsiftsis ◽  
Hans-Jürgen Zepernick

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