Title :
Near-Optimum Power Allocation for Outage Restricted Distributed MIMO Multi-Hop Networks
Author :
Wübben, Dirk ; Lang, Yidong
Author_Institution :
Dept. of Commun. Eng., Univ. of Bremen, Bremen
Abstract :
The throughput of multi-hop communication systems can significantly be increased by the application of MIMO concepts. To utilize the physical resources in an efficient way while meeting the quality-of-service (QoS) constraints, appropriate power allocation strategies are desired. In this paper the total transmit power of a MIMO multi-hop system is minimized under the constraint of a given end-to-end outage probability. The optimum power allocation corresponds to a convex optimization problem. In order to achieve an analytical solution, the original task is relaxed by stringent approximations and a simple closed- form near-optimum solution is proposed. As this improved approximative power allocation (IAPA) achieves excellent performance results, this new approach is also very useful for investigating outage restricted multi-hop systems analytically.
Keywords :
MIMO communication; probability; quality of service; QoS constraints; closed- form near-optimum solution; convex optimization problem; end-to-end outage probability; improved approximative power allocation; multiple-input multiple-output systems; near-optimum power allocation; outage restricted distributed MIMO multihop networks; quality of service; stringent approximations; Closed-form solution; Decoding; MIMO; Performance analysis; Power engineering and energy; Power system modeling; Resource management; Space time codes; Spread spectrum communication; Transmitting antennas;
Conference_Titel :
Global Telecommunications Conference, 2008. IEEE GLOBECOM 2008. IEEE
Conference_Location :
New Orleans, LO
Print_ISBN :
978-1-4244-2324-8
DOI :
10.1109/GLOCOM.2008.ECP.862
