Patent ID: 11924705
Assignee: PSJ INTERNATIONAL LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 4:
5. A positioning system, comprising:
a plurality of receivers dispersedly arranged to form a target area, wherein each of the plurality of receivers includes:
the antenna device as claimed in claim 1;
a first wireless network interface controller connected to the difference output terminal, wherein the first wireless network interface controller is configured to receive a wireless signal from the target area through the antenna device, and process an output signal of the difference output terminal to generate a difference signal strength; and
a second wireless network interface controller connected to the sum output terminal, wherein the second wireless network interface controller is configured to receive the wireless signal from the target area through the antenna device, and process another output signal of the sum output terminal to generate a sum signal strength; and
a computing device communicatively connected with the receivers, and including a processing module and a storage module, wherein the processing module is configured to:
execute, for each of the plurality of receivers, following actions:
calculating a ratio between the sum signal strength and the difference signal strength to obtain a sum-difference ratio; and
estimating, according to the sum-difference ratio and a comparison table stored in the storage module, one of multiple estimated incident angles that corresponds to the sum-difference ratio, wherein the comparison table defines a relationship between a plurality of ratios and a plurality of angles;

execute, in response to obtaining the estimated incident angles corresponding to the receivers, a positioning algorithm according to the estimated incident angles, so as to generate a plurality of possible positions; and
execute an optimization algorithm to calculate a best estimated position of the possible positions.