Abstract:

STBCencoded cooperative transmission system in wireless sensor networks and its energy efficiency are investigated. A criterion for performance comparison between STBCencoded cooperative transmission and single transmission is proposed. The threshold of transmit power in cooperative transmission is calculated for energylimited wireless sensor networks. Simulation results demonstrate that the proposed threshold of transmitted power can minimize the overall networktransmission power with a certain outage probability.

Key words: cooperative transmission, outage probability, STBC, wireless sensor networks