Patent ID: 11877207
Assignee: POLARIS WIRELESS, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A method comprising:
receiving:
(i) a first measurement value MV(1) of the locally-averaged signal strength of a radio signal as received at a first measurement location ML(1), wherein the radio signal is characterized by a wavelength λ, and
(ii) a second measurement value MV(2) of the locally-averaged signal strength of the radio signal as received at a second measurement location ML(2), wherein the first measurement location is not equal to the second measurement location;

generating:
(i) a first candidate location CL(1) of a radio transmitter of the radio signal, and
(ii) a second candidate location CL(2) of the radio transmitter of the radio signal, wherein the first candidate location is not equal to the second candidate location;

generating:
(i) a first candidate prediction of the total path loss A(1,1) for a hypothetical radio signal from the first candidate location CL(1) to the first measurement location ML(1), wherein the hypothetical radio signal is characterized by the wavelength λ, and
(ii) a second candidate prediction of the total path loss A(1,2) for the hypothetical radio signal from the first candidate location CL(1) to the second measurement location ML(2), and
(iii) a third candidate prediction of the total path loss A(2,1) for the hypothetical radio signal from the second candidate location CL(2) to the first measurement location ML(1), and
(iv) a fourth candidate prediction of the total path loss A(2,2) for the hypothetical radio signal from the second candidate location CL(2) to the second measurement location ML(2);

generating an estimate of the location of the radio transmitter of the radio signal based on which of:
(1) the first candidate location CL(1), and
(2) the second candidate location CL(2), is more consistent with the first measurement value MV(1), the second measurement value MV(2), the first candidate prediction of the total path loss A(1,1), the second candidate prediction of the total path loss A(1,2), the third candidate prediction of the total path loss A(2,1), and the fourth candidate prediction of the total path loss A(2,2).