Power Allocations for Adaptive Distributed MIMO Multi-Hop Networks

—Distributed MIMO multi-hop relaying is one of the most promising technologies that permits cost-effective improvement of coverage, data rate and end-to-end (e2e) user experience by utilizing distributed low-complexity space-time codes to overcome path losses and deep fades of wireless channels. However, an efficient transmission scheme and resource management are required to exploit these advantages. Specifically, low-complexity adaptive schemes and power control strategies should be designed, thereby achieving robust and cost-efficient e2e communications. In this paper an adaptive transmission scheme is presented, where one relay stops forwarding the message if it is in outage and other nodes adapt to a new spacetime code. For this adaptive scheme, optimal as well as suboptimal closed-form power allocation solutions are derived which minimize the total transmission power while satisfying a given e2e outage probability. The significant power savings due to the proposed approache...

• Type: Conference
• Year: 2009
• Where: ICC
• Authors: Yidong Lang, Dirk Wübben, Karl-Dirk Kammeyer
• Keywords: Adaptive Scheme, Adaptive Transmission Scheme, Communications, ICC 2009, Transmission Scheme