Constructing Error Correcting Codes for Wireless Sensor Networks
Many application scenarios have been revealed with Wireless Sensor Networks (WSNs). An Error Correcting Code (ECC) will be advantageous to communications in these applications. With the different expecting on efficiency, security, usability, etc., different codes have been constructed for various purposes. The methods based on algebra theory can work well for constructing simple and usability codes. The theory of algebraic geometry can help construct more complex codes with different properties. With the applications of these codes, it is convenient to arrive the purpose in digital communications.
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ABSTRACT: Wireless Sensor Networks (WSN) is formerly created to support text-based data communication. However, by improving link level mechanism of WSN with Error Control Codng (ECC), reliable multimedia transmission could be realized. This paper addresses the performance issue of transferring multimedia data, particularly still image data, using real sensor motes platform. An X-ray image is transferred from one mote to other mote in one hop scenario. Forward Error Correction (FEC) and interleaving technique are used to design the code that capable of handling both erasure and noise in the received packet. The results show that erasure code can effectively combat the effect of random noise in one packet despite its number as well as recover small quantity of lost packet. Fdermore, the scheme can increase the image PSNR (Peak Signal to Noise Ratio) up to 18.41 dB as compared to the uncoded counterpart
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