In this paper, we investigate the resource allocation in a differentially modulated relay network. In addition to the energy optimization, we also consider location optimization to minimize the average symbol error rate (SER). The closed- form solution is derived for the single-relay case, and formulas allowing numerical search are provided for multiple-relay cases. Analytical and simulated comparisons confirm that the optimized systems provide considerable improvement over the unoptimized systems, and that the minimum SER can be achieved via the joint energy-location optimization.
Bibliographical noteFunding Information:
Paper approved by E. Erkip, the Editor for Cooperation Diversity of IEEE Communication Society. Manuscript received February 21, 2006; revised December 7, 2006 and April 10, 2007. Part of the results in this paper was presented at the IEEE Military Communications Conference, Washington, DC, Oct. 23-25, 2006, and the IEEE International Conference on Acoustics, Speech, and Signal Processing, Honolulu, Hawaii, Apr. 15-20, 2007. This work is supported in part by the Office of Naval Research under grants N00014-07-1-0868 and N00014-07-1-0193.
- Cooperative system
- Differential phase shift keying
- Resource management