Wolf, Greenfield & Sacks, P.C.
Wireless sensor network deployment structure combined with SFFT and COA and frequency spectrum reconstruction method therefor
A wireless sensor network deployment structure combined with SFFT and COA and a frequency spectrum reconstruction method therefor. The wireless sensor network deployment structure includes: frequency spectrum acquisition sensor nodes dispersed in each region, and a sink node, wherein all the frequency spectrum acquisition sensor nodes have the same structure, and include: a broadband frequency spectrum antenna, a delayer, an ADC, a first baseband processing module, a DAC and a transmitting antenna that are successively connected; all the frequency spectrum acquisition sensor nodes are cooperated to realize SFFT and COA of signals; the signals transmitted by all the frequency spectrum acquisition sensor nodes are superimposed over the air and received by the sink node; and the sink node extracts a data domain from a received signal frame by post-processing, thereby completing frequency spectrum reconstruction. The solution can be easily deployed in an existing wireless sensor network without changing the traditional ADC working mode and communication mode; moreover, the delay is shorter, the sampling rate of the reconstructed frequency spectrum is higher, and the complexity is lower.
University of Science and Technology of China
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Li Weidong Xiaohui Fangzhou
Chen Wang Chen Wu