IEEE Transactions on Wireless Communications
Multinode Cooperative Communications in Wireless Networks
IEEE Transactions on Signal Processing
Non-coherent distributed space-time processing for multiuser cooperative transmissions
IEEE Transactions on Wireless Communications
Diversity order analysis of the decode-and-forward cooperative networks with relay selection
IEEE Transactions on Wireless Communications - Part 2
Threshold Selection for SNR-based Selective Digital Relaying in Cooperative Wireless Networks
IEEE Transactions on Wireless Communications - Part 1
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
A simple Cooperative diversity method based on network path selection
IEEE Journal on Selected Areas in Communications
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One of the main drawbacks of cooperative communication systems with half-duplex relaying is inefficient use of spectrum. Incremental relaying is an effective technique that overcomes this limitation, particularly in the high-SNR regime. In this paper, for a multi-relay cooperative network with arbitrary number of relay nodes, we propose a spectrally-efficient incremental relaying scheme that eliminates redundant relay transmissions such that an average end-to-end bit error rate (BER) constraint is satisfied. For detect-and-forward relaying, under the assumption of error propagation from the relays to the destination, we analyze the performance of the system in terms of the end-to-end BER, the average spectral efficiency and the outage probability for Rayleigh fading environment. The performance of the system depends on a single threshold employed by the relays and the destination. We optimize this threshold such that the average spectral efficiency of the system is maximized under an average end-to-end BER constraint. This optimization criterion results in a constant-BER, variable-spectral efficiency relaying scheme. The proposed scheme makes use of spectrum as efficiently as possible, while providing the required quality of service at the destination.