Object location
First Claim
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1. A positioning method of a radio station (10, 20), the method comprising:
- providing a parameter database (36) including expected signal parameters of backscattered signals as a function of position;
providing an object database (37) including expected signal parameters of backscattered signals from a plurality of objects;
transmitting a location signal (6) from the radio station so that it undergoes multipath reflection before being received back at the radio station as a received signal (8);
measuring predetermined features of the received signal;
comparing the predetermined features of the received signal with the stored data in the parameter database to find the best match and accordingly the position of the radio station;
identifying differences between the predetermined features of the received signal and that expected from the stored data in the parameter database; and
comparing the differences with the stored data in the object database to find any good matches and accordingly to identify objects located in the vicinity of the radio station.
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Abstract
A positioning method uses backscattered signals from a radio station (10, 20) to locate the radio station within an area, for example in a room in a building. The difference between the measured backscattered signals and the expected signals is then found, and the difference is compared with data stored in an object database (37) to identify objects in the vicinity of the radio station (10, 20).
38 Citations
11 Claims
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1. A positioning method of a radio station (10, 20), the method comprising:
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providing a parameter database (36) including expected signal parameters of backscattered signals as a function of position;
providing an object database (37) including expected signal parameters of backscattered signals from a plurality of objects;
transmitting a location signal (6) from the radio station so that it undergoes multipath reflection before being received back at the radio station as a received signal (8);
measuring predetermined features of the received signal;
comparing the predetermined features of the received signal with the stored data in the parameter database to find the best match and accordingly the position of the radio station;
identifying differences between the predetermined features of the received signal and that expected from the stored data in the parameter database; and
comparing the differences with the stored data in the object database to find any good matches and accordingly to identify objects located in the vicinity of the radio station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A radio station (10, 20) comprising:
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at least one antenna (18, 28);
a transceiver (12, 22);
a processor (14, 24); and
a memory (16, 26) storing a parameter database (36) including expected signal parameters of backscattered signals as a function of position within the building; and
an object database (37) including expected signal parameters of backscattered signals from a plurality of objects;
wherein the memory includes code (30) arranged to cause the radio station;
to transmit a location signal from the at least one antenna so that it undergoes multipath reflection before being received at the receiver as a received signal;
to measure predetermined features of the received signal;
to compare the predetermined features with the stored data in the parameter database to find the best match and accordingly the position of the radio station;
to identify differences between the predetermined features of the received signal and that expected from the stored data in the parameter database; and
to compare the differences with the stored data in the object database (37) to find any good matches and accordingly to identify objects located in the vicinity of the radio station. - View Dependent Claims (10, 11)
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Specification