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

• Published in: IEEE communications letters Vol. 14; no. 10; pp. 945 - 947
• Main Authors: TSAI, Yuh-Ren, LIN, Li-Cheng
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.10.2010; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Access methods and protocols, osi model; Allocations; Applied sciences; Computational complexity; Cooperative diversity; decode-and-forward; Diversity reception; Energy conservation; Energy use; Exact sciences and technology; Fading; Operation, maintenance, reliability; Optimization; outage probability; Outages; power allocation; Relays; Resource management; Signal to noise ratio; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Teleprocessing networks. Isdn; Thresholds; Performance evaluation; Cooperative diversity; outage probability; Outage; Optimal allocation; decode-and-forward; Transmission protocol; Routing protocols; Power allocation; Service quality
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2010.091010.100361

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.