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In recent years, wireless sensor networks (WSNs) have been widely used in many real-life scenarios, and have become more and more important. However, in some harsh environments, sensor nodes may suffer from a large scale damage that causes the network to get partitioned into multiple disjoint segments. How to connect these segments (in WSNs) is very important. In addition, the higher the connectivity...
A method for estimating the hop period of frequency hopping (FH) signals based on Hilbert-Huang transform (HHT) is proposed. This method iteratively decomposes the FH signal into intrinsic mode functions (IMFs) and applies Hilbert transform to each IMF to yield Hilbert spectrum, whose maxima for each time instant are extracted to form a sequence. A simple Fourier transform based analysis of the obtained...
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