Convex Optimization
On the amount of fading in MIMO diversity systems
IEEE Transactions on Wireless Communications
Distributed Space-Time Coding in Wireless Relay Networks
IEEE Transactions on Wireless Communications
Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks
IEEE Transactions on Information Theory
Using Orthogonal and Quasi-Orthogonal Designs in Wireless Relay Networks
IEEE Transactions on Information Theory
Fading relay channels: performance limits and space-time signal design
IEEE Journal on Selected Areas in Communications
Partially-coherent distributed space-time codes with differential encoder and decoder
IEEE Journal on Selected Areas in Communications
Channel estimation and performance of mismatched decoding in wireless relay networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
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This paper derives an optimal power allocation (PA) to maximize the effective average signal-to-noise ratio (SNR) of distributed space-time coding (DSTC) in wireless relay networks, where the locations of the relays can be anywhere between the source and destination. It is first shown that in maximizing the average SNR, not all the relays might be active, and hence the code performance might be compromised. The amount of fading is then introduced for the relay networks and used as a constraint to derive a novel PA scheme. This new PA is shown to obtain the maximum diversity order of both noncoherent and coherent DSTC systems at high SNR.