scholarly journals Outage performance of orthogonal space-time block code transmission in opportunistic decode-and-forward cooperative networks

2011 ◽  
Vol 13 (7) ◽  
pp. 700-710 ◽  
Author(s):  
Changqing Yang ◽  
Wenbo Wang ◽  
Shuping Chen ◽  
Mugen Peng
Keyword(s):  
Block Code ◽  
Cooperative Networks ◽  
Space Time ◽  
Time Block ◽  
Decode And Forward ◽  
Space Time Block Code ◽  
Outage Performance ◽  
Orthogonal Space

scholarly journals A Minimum Mean-Square-Error (MMSE) Decoder for Quasi-Orthogonal Space–Time Block Code

Electronics ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 732
Author(s):  
Jae Jin Jeong
Keyword(s):  
Mean Square Error ◽  
Transmission Rate ◽  
Minimum Mean Square Error ◽  
Estimation Method ◽  
Block Code ◽  
Space Time ◽  
Mean Square ◽  
Time Block ◽  
Space Time Block Code ◽  
Orthogonal Space

The quasi-orthogonal space–time block code (QO-STBC) was introduced to achieve a full transmission rate for the four antennas system. In this paper, a decoding method for the QO-STBC is proposed to improve the bit-error-rate (BER) and to solve a rank-deficient problem. The proposed algorithm is based on the minimum mean-square-error (MMSE) technique. To overcome the implementation problem from the MMSE, an estimation method of the noise variance is developed in this paper. The proposed algorithm is implemented without matrix inversion, therefore, the proposed algorithm achieves a better BER than the conventional algorithms, as it has a low computational complexity. The simulation results show the low BER of the proposed algorithm in a Rayleigh fading channel.

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