Station device, Wi-Fi system, and associated positioning method

A Wi-Fi system, comprising:

• a first access point device, configured for transmitting at least a first-first Wi-Fi signal and a second-first Wi-Fi signal;
• a second access point device, configured for transmitting at least a first-second Wi-Fi signal and a second-second Wi-Fi signal;
• and
• a mobile station device, comprising:
• a first antenna, configured for receiving a first-first Wi-Fi signal being transmitted along a first-first transmission path, and receiving a second-first Wi-Fi signal being transmitted along a second-first transmission path;
• a second antenna, configured for receiving a first-second Wi-Fi signal being transmitted along a first-second transmission path, and receiving a second-second Wi-Fi signal being transmitted along a second-second transmission path, wherein
• the first-first Wi-Fi signal and the first-second Wi-Fi signal originate from the first Wi-Fi signal, and the second-first Wi-Fi signal and the second-second Wi-Fi signal originate from the second Wi-Fi signal;
• and
• a communication interface, electrically connected to the first antenna and the second antenna, configured for
• calculating a first angle of arrival based on a separation distance between the first antenna and the second antenna and a first path difference between the first-first Wi-Fi signal and the first-second Wi-Fi signal, and calculating a second angle of arrival based on the separation distance between the first antenna and the second antenna and a second path difference between the second-first Wi-Fi signal and the second-second Wi-Fi signal;
• and
• a control circuit, electrically connected to the communication interface, configured for performing a triangulation calculation to estimate a coordinate position of the mobile station device based on the first angle of arrival, the second angle of arrival, a coordinate position of the first access point device, and a coordinate position of the second access point device.

A positioning method applied to a Wi-Fi system comprising a first access point device, a second access point device, and a mobile station device, wherein the positioning method comprises steps of:

• the first access point device transmitting at least a first-first Wi-Fi signal and a second-first Wi-Fi signal;
• the second access point device transmitting at least a first-second Wi-Fi signal and a second-second Wi-Fi signal;
• through a first antenna, the mobile station device receiving a first-first Wi-Fi signal being transmitted along a first-first transmission path, and receiving a second-first Wi-Fi signal being transmitted along a second-first transmission path;
• through a second antenna, the mobile station device receiving a first-second Wi-Fi signal being transmitted along a first-second transmission path, and receiving a second-second Wi-Fi signal being transmitted along a second-second transmission path,
• wherein the first-first Wi-Fi signal and the first-second Wi-Fi signal originate from the first Wi-Fi signal, and the second-first Wi-Fi signal and the second-second Wi-Fi signal originate from the second Wi-Fi signal;
• and
• the mobile station device calculating a first angle of arrival based on a separation distance between the first antenna and the second antenna and a first path difference between the first-first Wi-Fi signal and the first-second Wi-Fi signal;
• the mobile station device calculating a second angle of arrival based on the separation distance between the first antenna and the second antenna and a second path difference between the second-first Wi-Fi signal and the second-second Wi-Fi signal;
• and
• the mobile station device performs a triangulation calculation to estimate a coordinate position of the mobile station device based on the first angle of arrival, the second angle of arrival, a coordinate position of the first access point device, and a coordinate position of the second access point device.