Estimating the location of a wireless terminal based on calibrated signal-strength measurements

A machine comprising:

• a receiver for receiving a first reported signal-strength measurement, R(1,n), from a wireless terminal;
• and
• a processor for generating a first calibrated signal-strength measurement, S(1,n), based on:
• (i) the first reported signal-strength measurement, R(1,n), and (ii) an identifying characteristic, C, of the wireless terminal;
• wherein the first reported signal strength is for a first signal received by the wireless terminal;
• and
• wherein the identifying characteristic, C, identifies the wireless terminal in comparison to another wireless terminal capable of receiving the first signal.

A process comprising:

• generating a first calibrated signal-strength measurement, S(1,n), based on (i) a first reported signal-strength measurement, R(1,n), as made by a wireless terminal and (ii) an identifying characteristic, C, of the wireless terminal;
• and
• estimating the location of the wireless terminal based on the first calibrated signal-strength measurement, S(1,n);
• wherein the first reported signal strength is for a first signal received by the wireless terminal;
• and
• wherein the identifying characteristic, C, identifies the wireless terminal in comparison to another wireless terminal capable of receiving the first signal.

A machine comprising:

• a receiver for receiving a first reported signal-strength measurement, R(1,n), as made by a wireless terminal;
• and
• a processor for:
• generating a first calibrated signal-strength measurement, S(1,n), based on (i) the first reported signal-strength measurement, R(1,n), and (ii) a identifying characteristic, C, of the wireless terminal;
• and
• estimating the location of the wireless terminal based on the first calibrated signal-strength measurement, S(1,n);
• wherein the first reported signal strength is for a first signal received by the wireless terminal;
• and
• wherein the identifying characteristic, C, identifies the wireless terminal in comparison to another wireless terminal capable of receiving the first signal.