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The problem of optimal power allocation among the relays in a two-hop decode-and-forward cooperative relay network with independent Rayleigh fading channels is considered. It is assumed that only the relays that decode the source message correctly contribute in data transmission. Moreover, only the knowledge of statistical channel state information is available. A new simple closed-form expression...
In this paper, the problem of optimal power allocation among the relays in two-hop decode-and-forward cooperative networks is considered, and a new power allocation scheme which minimizes the average symbol error probability under limited total power of all relays and limited maximum powers of individual relays is developed. It is shown that the corresponding power allocation optimization problem...
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