Method and system for detecting an object
A method of determining a position of an object, the method including: receiving a first signal reflected from the object using a first device, the first device a peer to peer wireless communication device, interrogating a native communication protocol on the first device to output a first angle of arrival corresponding to the angle of arrival of the first signal at the first device, using a second device remote from the first device to receive a second signal reflected from the object, the second device a peer to peer wireless communication device, interrogating a native communication protocol on the second device to output a second angle of arrival corresponding to the angle of arrival of the second signal at the second device, calculating the position of the object based on the first and second angles of arrival, wherein the first and second devices are isolated from each other.
1. A method of determining a position of an object, the method comprising:
receiving a first signal reflected from the object using a first device, wherein the first device is a peer to peer wireless communication device,
interrogating a native communication protocol on the first device to output a first angle of arrival corresponding to the angle of arrival of the first signal at the first device,
using a second device remote from the first device to receive a second signal reflected from the object, wherein the second device is a peer to peer wireless communication device,
interrogating a native communication protocol on the second device to output a second angle of arrival corresponding to the angle of arrival of the second signal at the second device,
calculating the position of the object based on the first and second angles of arrival,
wherein the first and second devices are isolated from each other such that there is no line of sight communication in the radio frequency domain between the devices.
2. The method of claim 1 , wherein the second device transmits a first transmitted signal which reflects off the object thereby forming the first signal, and
wherein the first device transmits a second transmitted signal which reflects off the object thereby forming the second signal.
3. The method of claim 1 , wherein a third device transmits a first transmitted signal which reflects off the object thereby forming the first signal and the second signal, wherein the third device is a peer to peer wireless device and is isolated from the first and second devices such that there is no line of sight communication in the radio frequency domain between the devices.
4. The method of claim 1 , wherein the object does not transmit a radio frequency signal received by either of the first and second devices.
5. The method of claim 1 , wherein calculating the position of the object is also based on a time of arrival and/or a received signal strength indicator corresponding to the first and/or second signal received at the respective device.
6. The method of claim 1 , wherein calculating the position of the object is not based on the time of arrival and/or a received signal strength indicator corresponding to the first or second signal detected at the respective device.
7. The method of claim 1 , wherein radio frequency isolation between the devices is achieved using a physical barrier that absorbs and/or reflects radio frequency signals, and/or the radio frequency isolation is achieved via a null in the receiving antenna.
8. The method of claim 1 , wherein the field of view of the first device and the field of view of the second device substantially overlap.
9. The method of claim 1 , wherein the first and second peer to peer wireless devices are ultra-wideband devices and preferably use high repetition pulse impulse radio (HRP-UWB), the respective transmitted signals comprising a HRP-UWB radio pulse.
10. The method of claim 9 , wherein the first and second devices use frequencies between 2 gigahertz and 10 gigahertz, and the HRP-UWB radio pulses have a bandwidth of around 500 megahertz, and duration of around 2 nanoseconds.
11. The method of claim 1 , wherein the peer to peer wireless devices are Bluetooth Low Energy (BLE) 5.1 devices, and wherein the devices use frequencies of between 2.4 gigahertz and 2.5 gigahertz.
12. The method of claim 1 , wherein each of the first and second devices comprise two antennas spatially displaced such that the respective angle of arrival calculable based on the time difference of arrival of the reflected signal at each antenna.
13. The method of claim 1 , wherein the first device and/or second device comprises three antennas spatially displaced from each other, wherein the three antennas are not arranged in a co-linear configuration.
14. The method of claim 1 , wherein the field of view of the devices in which the object is detectable extends up to 100 metres.
15. The method of claim 1 , further comprising,
implementing the calculated position of the object in a security system in order to detect a security breach and/or implementing the calculated position in order to control the operation of equipment.