Near-Optimum Power Allocation for Outage Restricted Distributed MIMO Multi-Hop Networks

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 closedform 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.

• Type: Conference
• Year: 2008
• Where: GLOBECOM
• Authors: Dirk Wübben, Yidong Lang
• Keywords: GLOBECOM 2008, Multi-hop Communication Systems, Power Allocation, Power Allocation Strategies, Telecommunications