Distributed differential beamforming and power allocation for cooperative communication networks

Published on Dec 1, 2020in International Journal of Electrical and Computer Engineering
· DOI :10.11591/IJECE.V10I6.PP%P
Gökhan Erdemir3
Estimated H-index: 3
(Istanbul Sabahattin Zaim University),
Samer Alabed3
Estimated H-index: 3
(American University of the Middle East)
+ 0 AuthorsTahir Cetin Akinci8
Estimated H-index: 8
(ITU: Istanbul Technical University)
Many coherent cooperative diversity techniques for wireless relay networks have recently been suggested to improve the overall system performance in terms of the achievable data rate or bit error rate (BER) with low decoding complexity and delay. However, these techniques require channel state information (CSI) at the transmitter side, at the receiver side, or at both sides. Therefore, due to the overhead associated with estimating CSI, distributed differential space-time coding techniques have been suggested to overcome this overhead by detecting the information symbols without requiring any (CSI) at any transmitting or receiving antenna. However, the latter techniques suffer from low performance in terms of BER as well as high latency and decoding complexity. In this paper, a distributed differential beamforming technique with power allocation is proposed to overcome all drawbacks associated with the later techniques without needing CSI at any antenna and to be used for cooperative communication networks. We prove through our analytical and simulation results that the proposed technique outperforms the state-of-the-art techniques in terms of BER with comparably low decoding complexity and latency.
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