Performance Analysis of Mimo and Cooperative Mimo Techniques in Wireless Sensor Networks

Abstract

The main limitation of the wireless sensor network is that it is a limited energy system, wireless nodes typically operate with small batteries for which replacement, when possible, is very difficult and expensive. Thus, the wireless nodes must operate without battery replacement for many years. Consequently, minimizing the energy consumption is a very important design consideration and energy-efficient transmission schemes must be used for the data transfer in wireless sensor networks. Thus focusing on antenna techniques to achieve Energy Efficiency in the Wireless sensor networks. In this project, we analyze the best transmission strategy to minimize the total energy consumption required to send a given number of bits. The total energy consumption includes both the transmission energy and the circuit energy consumption. We first consider multi-input–multi-output (MIMO) systems based on Alamouti diversity schemes, which have good spectral efficiency but also more circuitry that consumes energy. We then extend our energy-efficiency analysis of MIMO systems to individual single-antenna nodes that cooperate to form multipleantenna transmitters or receivers. By transmitting and/or receiving information jointly, we show that tremendous energy saving is possible for transmission distances larger than a given threshold, even when we take into account the local energy cost necessary for joint information transmission and reception. We also show that over some distance ranges, cooperative MIMO transmission and reception can simultaneously achieve energy saving.