Abstract
In this paper, we propose a new solution for improving BER performance of virtual quasi orthogonal space-time block coding (QOSTBC). The proposed solution is compared with virtual QOSTBC and virtual orthogonal space-time block coding (OSTBC). One of the main disadvantages of virtual OSTBC is its code rate, while on the other side code rate of QOSTBC equals 1, but with BER performance degradation as a consequence. The scheme proposed here provides improved BER performance in comparison with QOSTBC, and has preserved code rate of 1. The considered schemes are used for creating virtual 4 × 1 multiple input-single output channel. These schemes include one base station, one relay station, both equipped with two antennas, and one mobile station with a single antenna.
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Acknowledgments
The results presented in this paper are part of the “Improving the concept of MIMO communications in cellular networks of the next generations” research project, funded by Montenegrin Ministry of Science. Also, work is funded by European Union project Fore-Mont as a part of Seventh Framework Programme (Grant Agreement No. 315970 FP7-REGPOT-CT-2013) http://www.foremont.ac.me.
