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Motivated by recent works involving multi-antenna fixed relay cooperation, this paper investigates the performance of fixed multi-antenna relay networks, where the source node communicates with the destination node via two fixed multi-antenna relays (infrastructure based relays). To improve the system spectral efficiency, incremental relaying technique is applied. The exact closed-form expression...
In this paper, we present a unified performance analysis for cognitive cooperative communication systems. In particular, the system performance in terms of outage probability (OP) for three cooperative protocols, i.e. fixed decode-and-forward (DF) relaying (FR), selective DF relaying (SR), incremental DF relaying (IR), under interference constraints, is derived over dissimilar Rayleigh fading channels...
In this paper, we propose a novel scheme, which combines both advantages of adaptive modulation and the concept of distributed switching. Unlike previous incremental relaying protocols under adaptive modulation, we consider a more realistic scenario where the link providing higher spectral efficiency is chosen for data transmission. We also examine the outage probability, bit error rate, and spectral...
We propose and analyze a distributed switch and stay combining network with selection relaying with an aim to reduce the complexity at the destination as well as to make efficient use of the degrees of freedom of the channels by exploiting a limited feedback signal from the destination. In particular, whenever the currently connected link (either from the source or from the best relay) to the destination...
We propose an efficient combination of distributed switch and stay and selection relay that offers the best performance at high SNRs compared to conventional selection relay schemes and to incremental relaying schemes in conjunction with selection relay. Our results, in terms of bit error probability, confirm the benefit of the proposed scheme at high SNR regime. We also show that the high-SNR performance...
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