System and method for estimating separation distance between impulse radios using impulse signal amplitude
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Accused Products
Abstract
An impulse radio system estimates a separation distance between an impulse radio transmitter and an impulse radio receiver. The system includes an impulse transmitter that transmits an impulse signal having an ultra-wideband frequency characteristic. An impulse receiver spaced from the transmitter receives the transmitted impulse signal and measures a signal strength of the received impulse signal. The receiver estimates the separation distance based on the measured signal strength. The receiver classifies a signal propagational/multipath environment using the received impulse signal, and then selects a radio propagation path loss model corresponding to a classified multipath environment. The receiver translates the measured signal strength to a separation distance based on the selected radio propagation path loss model.
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Citations
48 Claims
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1-24. -24. (canceled)
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25. A method for locating an impulse radio, comprising:
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communicating impulse signals between a first impulse radio and a plurality of second impulse radios;
performing a received signal strength measurement for each of the impulse signals;
selecting one of a plurality of radio propagation path models;
estimating a separation distance between the first impulse radio and each of the plurality of second impulse radios based on a corresponding one of the received signal strength measurements and the radio propagation path model to produce a plurality of separation distances; and
determining a location relating to the first impulse radio based on the plurality of separation distances. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method for locating an impulse radio transmitter, comprising:
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transmitting an impulse signal from the impulse radio transmitter;
receiving the impulse signal at each of a plurality of impulse radio receivers;
performing a received signal strength measurement for the impulse signal at each of the plurality of impulse radio receivers;
selecting one of a plurality of radio propagation path models;
estimating a separation distance between each of the plurality of impulse radio receivers and the impulse radio transmitter based on a corresponding one of the received signal strength measurements and the selected radio propagation path model to produce a plurality of separation distances; and
determining a location relating to the impulse radio transmitter based on the plurality of separation distances.
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36. A method for locating an impulse radio receiver, comprising:
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transmitting an impulse signal from a plurality of impulse radio transmitters;
receiving the impulse signals at the impulse radio receiver;
performing a received signal strength measurement for each of the impulse signals;
selecting one of a plurality of radio propagation path models;
estimating a separation distance between each of the plurality of impulse radio transmitters and the impulse radio receiver based on a corresponding one of the received signal strength measurements and the selected radio propagation path model to produce a plurality of separation distances; and
determining a location relating to the impulse radio receiver based on the plurality of separation distances.
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37. A system for locating an impulse radio, comprising:
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a first impulse radio; and
a plurality of second impulse radios communicating impulse signals with said first impulse radio;
at least one received signal strength indicator that performs a received signal strength measurement for the impulse signals;
at least one signal evaluator that selects one of a plurality of radio propagation path models; and
at least one processor that estimates a separation distance between the first impulse radio and each of the plurality of second impulse radios based on a corresponding one of the received signal strength measurements and the selected radio propagation path model to produce a plurality of separation distances, said plurality of separation distances being used for determining a location relating to the first impulse radio. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A system for locating an impulse radio transmitter, comprising:
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a plurality of impulse radio receivers for receiving an impulse signal transmitted from the impulse radio transmitter;
at least one received strength signal indicator that performs a received signal strength measurement on the impulse signal at each of the plurality of impulse radio receivers;
at least one signal evaluator that selects one of a plurality of radio propagation path models; and
at least one processor that estimates a separation distance between each of the plurality of impulse radio receivers and the impulse radio transmitter based on a corresponding one of the received signal strength measurements and the selected radio propagation path model to produce a plurality of separation distances, said plurality of separation distances being used for determining a location relating to the impulse radio transmitter.
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48. A system for locating an impulse radio receiver, comprising:
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a plurality of impulse radio transmitters each transmitting an impulse signal;
an impulse radio receiver for receiving the impulse signals;
a received signal strength indicator that performs a received signal strength measurement for each of the impulse signals;
a signal evaluator that selects one of a plurality of radio propagation path models; and
a processor that estimates a separation distance between each of the plurality of impulse radio transmitters and the impulse radio receiver based on a corresponding one of the received signal strength measurements and the selected radio propagation path model to produce a plurality of separation distances, said plurality of separation distances being used for determining a location relating to the impulse radio receiver.
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Specification