S. Siva Ranjani

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One of the major issues in Wireless Sensor Network is maximizing the lifetime of the network. In general, all sensor nodes directly send the information to the Base station so the energy requirement is very high. Clustering is used to decrease energy consumption and collision. In this paper, we propose an Energy efficient Cluster Based Data Aggregation(More)
Third-Generation Partnership Project LongTerm Evolution (3GPP LTE) and Worldwide Interoperability for Microwave Access (WiMAX) standards adopt MIMO-OFDM symbol detection in these standards requires channel state information (CSI) estimation. multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) techniques. To achieve very(More)
In wireless sensor networks, greater energy is spent for communication when compared to computation and storage cost. Overlapping of sensing regions is higher, when the sensors are densely deployed and nodes in the same sensing region transmit the similar information to the base station. Hence the energy is wasted in communication part because of the high(More)
Multiple Input Multiple Output (MIMO) antenna technology has emerged as an effective technique for significantly improving the capacity of wireless communication systems. Multi-carrier modulation scheme can achieve high data rate in frequency-selective fading channels. Orthogonal Frequency Division Multiplexing (OFDM) may be combined with antenna arrays at(More)
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