Single and multiple relay selection schemes and their achievable diversity orders
IEEE Transactions on Wireless Communications
Network beamforming using relays with perfect channel information
IEEE Transactions on Information Theory
Interference cancellation in distributed space-time coded wireless relay networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Exact symbol error probability of a Cooperative network in a Rayleigh-fading environment
IEEE Transactions on Wireless Communications
Power-Bandwidth Tradeoff in Dense Multi-Antenna Relay Networks
IEEE Transactions on Wireless Communications
Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
Transmit beamforming in multiple-antenna systems with finite rate feedback: a VQ-based approach
IEEE Transactions on Information Theory
MIMO Broadcast Channels With Finite-Rate Feedback
IEEE Transactions on Information Theory
Distributed beamforming in wireless relay networks with quantized feedback
IEEE Journal on Selected Areas in Communications
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This paper is on quantized beamforming in wireless amplify-and-forward relay interference networks with multiple transmitter-receiver pairs. We design the quantizer of the feedback information specifically to optimize the union bound on the bit error rate performance. Two different quantization schemes are considered. First, using a global quantizer structure, we analytically show that a simple feedback scheme based on relay selection can achieve full diversity. Then, we design a local quantization scheme with distributed quantizer encoders, one at each receiver. We show that, with only a few feedback bits, high diversity gains can be obtained with the local quantizer structure as well. Simulations are also provided, confirming our analytical results. We observe that our designs guarantee an equal high diversity gain for each transmitter-receiver pair.