Abstract
A 4-bit adaptive differential pulse-code modulation (ADPCM) scheme applied to the sensor data of a Zigbee based wireless sensor network node is shown to decrease the energy consumption of the analog front-end of the node by 58%. Simulation results from an energy model of an 802.15.4 based analog front-end show that the energy consumed by the network node is inversely proportional to the number of bits used to encode the digital data. The quantization error of a 4-bit ADPCM scheme is on average -14 dB for low frequency data and only 3 dB higher than a traditional 8-bit PCM scheme. By modifying the modulation scheme in the software with no modification of the hardware, the lifetime of the node can be increased significantly with minimal modifications.
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Billoo, M., Sable, C. (2008). Energy Consumption Reduction of a WSN Node Using 4-bit ADPCM. In: Li, Y., Huynh, D.T., Das, S.K., Du, DZ. (eds) Wireless Algorithms, Systems, and Applications. WASA 2008. Lecture Notes in Computer Science, vol 5258. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-88582-5_33
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DOI: https://doi.org/10.1007/978-3-540-88582-5_33
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-88581-8
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