Adaptive MIMO-OFDM to evaluate the performance of wireless multimedia sensor network
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Date
2018-08
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
Wireless Multimedia Sensor Networks (WMSN) are designed to transmit audio and video streams, still images and scalar data. Multimedia transmission over wireless sensor network has many killer applications like video surveillance system, object tracking, telemedicine, theft control system and traffic monitoring. Researchers are facing many challenges such as higher data rate, lower energy consumption, reliability, signal detection and estimation, uncertainty in network topology, Quality of Service and security and privacy-related issues to accomplish various applications of WMSN. Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) is proposed for Wireless Multimedia Sensor Networks to improve system performance in terms of data rate and energy consumption. Efficient wireless multimedia sensor network is designed using adaptive MIMO-OFDM and compressive sensing algorithm. QoS depends on image size, the sparsity of the information and number of measurements. In MIMO-OFDM, higher order modulation techniques improve data rate but in worst channel condition it increases the error rate. There is a trade-off between data rate and error rate. An adaptive MIMO-OFDM is developed to balance data rate and error rate. Modulation scheme get selected automatically according to channel environment that helps to improve data rate with good QoS.
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