Cooperative Distributed AF Wireless Relay Network in Adverse Communication Environments with Power Constraint

This paper studied a new approach designed for a distributed wireless network under three adverse communication environment, such as, broadband noise jamming (BNJ), node geometry, and channel uncertainty. It is designed for a cooperative network consisting of one-source, one-destination and N-relay nodes that implement amplify-and-forward (AF) strategy. Deriving optimal relay amplifying matrix is the primary contribution of this paper. Due to cooperation role for relay nodes, new nondiagonal matrix has been observed. This matrix is minimum mean square error (MMSE) criterion basis, and employs the difference between the original transmitted information message by the source and the received signal component at the destination. Effects of adverse wireless communication environments on wireless relay networks performance have been evaluated using Monte Carlo simulations. Bit error rate (BER) was used to validate the results.