Energy Efficient Communication for Adaptive MIMO Systems

Abstract- In this paper, we propose a mechanism which used to switch between single input multiple output and multiple input multiple output with maximum of two transmit antennas to reduce energy consumption at mobile terminals. when a base station is underutilized then to conserve mobile terminal energy slow down transmission rates so there need to have one crossover point on the transmission rate and below that SIMO is more efficient than MIMO when circuit power is considered but Crossover point is increases with circuit power, channel correlation and the number of receiver antennas these all the factors increase the potential energy savings in mode switching. We recommend an adaptive mode switching algorithm which combined with rate selection according to user perceived performance is acceptable that maintain a user’s target throughput and also conserve mobile terminal energy. Simulations under dynamic loads confirm that the recommended technique can reduce the transmission energy and also enables an effective tradeoff between energy conservation and file transfer delay