公开(公告)号：US20200374819A1

公开(公告)日：2020-11-26

申请号：US16771195

申请日：2018-07-11

Applicant: University of Science and Technology of China

Inventor： Fangzhou Wu ,  Li Chen ,  Xiaohui Chen ,  Weidong Wang

IPC: H04W56/00 ,  H04W16/02 ,  H04L25/02

Abstract: 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.

公开(公告)号：US11317362B2

公开(公告)日：2022-04-26

申请号：US16771195

申请日：2018-07-11

Applicant: University of Science and Technology of China

Inventor： Fangzhou Wu ,  Li Chen ,  Xiaohui Chen ,  Weidong Wang

IPC: H04W56/00 ,  H04L25/02 ,  H04W16/02 ,  H04W84/18

Abstract: 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.