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Low-Complexity Distributed Compression in Wireless Sensor Networks

机译:无线传感器网络中的低复杂性分布式压缩

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In this paper, we develop a distributed compression technique that has low decoding and encoding computational complexity. The proposed scheme exploits both temporal and spatial correlations between nodes in distributed sensor networks. In case of events occurring, the values of both spatial and temporal might change and the compression technique needs to adjust its rate to the changes automatically. Our proposed algorithm reactively changes its compression rate to adapt to the variations in the correlations. This algorithm uses the well-known compressive sensing algorithm to exploit the spatial correlation. Rate less codes were adopted to generate the measurements. The number of measurements are adjusted based on the temporal correlations among sensors. When sensor readings are changing slowly, the compression rate is improved by reducing the number of measurements. In case of any event that significantly changes the signal readings, the algorithm generates more measurements to guarantee recovery of signal at the base station. The experimental results done over data gathered by 64 temperature sensors and also Matlab simulation results reveal that our algorithm is flexible to adapt the variations in the sensor readings, while it keeps the compression rate the minimum.
机译:在本文中,我们开发了一种具有低解码和编码计算复杂性的分布式压缩技术。所提出的方案利用分布式传感器网络中的节点之间的时间和空间相关性。在发生事件的情况下,空间和时间的值可能会改变,压缩技术需要自动调整其速率。我们所提出的算法反应地改变其压缩率,以适应相关性的变化。该算法使用众所周知的压缩感测算法来利用空间相关性。采用较少的代码来产生测量。基于传感器之间的时间相关来调整测量次数。当传感器读数缓慢地改变时,通过减少测量次数来改善压缩率。在任何事件的情况下显着改变信号读数,该算法会产生更多的测量以保证在基站处的信号恢复。通过64个温度传感器收集的数据进行的实验结果表明我们的算法适应传感器读数中的变化是灵活的,同时保持压缩率最小。

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