Optimum Resource Allocation for Amplify-and-Forward Cooperative Networks with Differential Modulation

Authors:
Mohammadreza Rahmatpour;Vahid Tabataba Vakili
Affiliations:
Dept. of Electrical Eng, Iran University of Science and Technology,;Dept. of Electrical Eng, Iran University of Science and Technology,
Venue:
NEW2AN '08 / ruSMART '08 Proceedings of the 8th international conference, NEW2AN and 1st Russian Conference on Smart Spaces, ruSMART on Next Generation Teletraffic and Wired/Wireless Advanced Networking
Year:
2008

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Abstract

The optimum resource allocation in relay networks is used to improve the error performance and increase the energy efficiency. In this paper, a two-dimensional resource allocation, i.e., the energy optimization and location optimization, is carried out based on the average symbol error rate (SER) for the system with and without a direct link. Differential modulation which bypasses the channel estimation at the transceiver is investigated using amplify-and-forward protocol for the system with multiple relays. We also show that the minimum error rate can be achieved via the joint energy-location optimization.