Energy Efficiency of Cooperative MIMO in Wireless Sensor Networks over Rayleigh Fading Channel

摘要

In wireless sensor networks (WSNs) nodes are oftenpowered by batteries, which are difficult to replace or recharge. Hence, it is crucial to use energy-efficient techniques to reduce theenergy consumption of such transmission. Mainly the multi-inputmulti-output (MIMO) which is a proven technique to decreasesthe energy consumption of a wireless network. However, thedirect application of multiple antennas in one sensor node isimpossible since the latter is characterized by a minimal physiquesize. Neighbors nodes at transmitter and receiver cooperate withthe source and destination nodes to form a cooperative MIMOsystem. In this paper, the energy efficiency of cooperative MISO(multi-input single-output) and MIMO in WSNs are investigatedover a Rayleigh fading channel. This comparison helps us tochoose, according to the distance between the source and thedestination, the appropriate cooperative technique.