Relay Selection Scheme for AF Relay Network based on Cost Function Criterion
Kanghee Lee, Hyuck Moo Kwon, Wenhao Xiong, Hyung-Gi Kim, Inha Hyun · Journal of Networks · 2013
Abstract—An amplify-and-forward (AF) wireless relay network consisting of a one-source-one-destination node pair and cooperative multiple N relay nodes is proposed in three adverse wireless communication environments, i.e., jamming, node geometry, and channel uncertainty. Based on the minimum mean square error (MMSE) criterion, the optimal amplifying relay matrix in three adverse wireless environments with the relay power constraint is derived. In addition, the MMSE cost function behavior in three adverse environments is analytically investigated using the proposed optimal relay amplifying matrix. Finally, using the cost function value, the relay selection scheme in adverse wireless communication environments is presented, which is the main contribution of this paper. Index Terms—Amplifying relay matrix, MMSE, jamming, node geometry, channel uncertainty, relay power constraint, relay selection. I.