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Optimal Power Allocation for Decode-and-Forward Cooperative Diversity Under an Outage Performance Constraint

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2 Author(s)
Yuh-Ren Tsai ; Institute of Communications Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan ; Li-Cheng Lin

In this work, we study the problem of optimal power allocation for decode-and-forward cooperative communications. From the perspective of service quality, rather than minimize the outage probability as much as possible, our goal is to use the minimum power to maintain the outage performance below a specific threshold and thereby conserve the power/energy resource. We investigate two scenarios, a system with diversity and a system without diversity, and propose efficient schemes for finding the optimal power allocation under an outage performance constraint.

Published in:

IEEE Communications Letters  (Volume:14 ,  Issue: 10 )