An efficient cooperative transmission strategy based  on OSTBC for wireless sensor networks

 An efficient virtual MIMO（Multiple Input Multiple Output）cooperative transmission strategy based on OSTBC（Orthogonal Space Time Codes）for wireless sensor networks is proposed in this paper. The full-rate distributed OSTBC encoded cooperative transmission is adopted in the innercluster, in the meanwhile we optimize the constellation size and propose a more efficient cooperative transmission model combining WSN and MIMO systems.In the receiver, we apply an iterative decoding algorithm, and deduce an energy consumption function and the total delay equation. Simulations show that with the proposed strategy, the goal of full rate transmission can be achieved for any arbitrary number of cooperative nodes, and both the total energy consumption and the total delay on the transmission side can be greatly reduced. So our efficient virtual MIMO cooperative transimission model improve the wireless sensor network performance in both energy consumption and time delay, and our research can provide a meaningful reference for application of WSN.