Systems and methods for bi-static radio-based object location detection

A first wireless device for bi-static radio-based object location detection, the first wireless device comprising:

• a transceiver;
• a memory;
• and
• one or more processors communicatively coupled with the transceiver and the memory, wherein the one or more processors are configured to:
• obtain a location of a second wireless device;
• obtain a time-of-flight (ToF) and an angle of arrival (AoA) of a wireless wide-area network (WWAN) reference signal transmitted by a transmitting device, wherein the TOF and the AoA are obtained from measurements of the WWAN reference signal at a receiving device after the WWAN reference signal is reflected by an object, further wherein obtaining the AoA of the WWAN reference signal includes configuring the one or more processors to obtain a differential AoA (DAoA) indicative of an angle between a reflected path of the WWAN reference signal and a direct path between the first wireless device and the second wireless device;
• and
• determine a location of the object based on the location of the second wireless device, the ToF, and the AoA, wherein:
• the first wireless device comprises the transmitting device and the second wireless device comprises the receiving device, or
• the first wireless device comprises the receiving device and the second wireless device comprises the transmitting device.

An apparatus for bi-static radio-based object location detection, the apparatus comprising:

• means for obtaining a location of a wireless device;
• means for obtaining a time-of-flight (ToF) and an angle of arrival (AoA) of a wireless wide-area network (WWAN) reference signal transmitted by a transmitting device, wherein the TOF and the AoA are obtained from measurements of the WWAN reference signal at a receiving device after the WWAN reference signal is reflected by an object wherein the means for obtaining the AoA of the WWAN reference signal comprises means for obtaining a differential AoA (DAoA) indicative of an angle between a reflected path of the WWAN reference signal and a direct path between the apparatus and the wireless device;
• and
• means for determining a location of the object based on the location of the wireless device, the ToF, and the AoA, wherein:
• the apparatus comprises the transmitting device and the wireless device comprises the receiving device, or
• the apparatus comprises the receiving device and the wireless device comprises the transmitting device.

A non-transitory computer-readable medium storing instructions for bi-static radio-based object location detection, the instructions comprising code for:

• obtaining, at a first wireless device, a location of a second wireless device;
• obtaining, at the first wireless device, a time-of-flight (ToF) and an angle of arrival (AoA) of a wireless wide-area network (WWAN) reference signal transmitted by a transmitting device, wherein the TOF and the AoA are obtained from measurements of the WWAN reference signal at a receiving device after the WWAN reference signal is reflected by an object, wherein the code for obtaining the AoA of the WWAN reference signal comprises code for obtaining a differential AoA (DAoA) indicative of an angle between a reflected path of the WWAN reference signal and a direct path between the first wireless device and the second wireless device;
• and
• determining, with the first wireless device, a location of the object based on the location of the second wireless device, the ToF, and the AoA, wherein:
• the first wireless device comprises the transmitting device and the second wireless device comprises the receiving device, or
• the first wireless device comprises the receiving device and the second wireless device comprises the transmitting device.

A method for bi-static radio-based object location detection, the method comprising:

• requesting a location of a second wireless device from a first wireless device;
• receiving the location of the second wireless device, at the first wireless device, from the second wireless device;
• obtaining, at the first wireless device, a time-of-flight (ToF) and an angle of arrival (AoA) of a wireless wide-area network (WWAN) reference signal transmitted by a transmitting device, wherein the TOF and the AoA are obtained from measurements of the WWAN reference signal at a receiving device after the WWAN reference signal is reflected by an object;
• and
• determining, with the first wireless device, a location of the object based on the location of the second wireless device, the ToF, and the AoA;
• wherein:
• the first wireless device comprises the transmitting device and the second wireless device comprises the receiving device, or
• the first wireless device comprises the receiving device and the second wireless device comprises the transmitting device.