Two-way ranging techniques
First Claim
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1. A communication system comprising:
- a first communication device; and
a second communication device having a receiver to receive a first signal transmitted by the first communication device and coupled to receive a second signal generated by the second communication device to transmit to the first communication device, where the first and second signals are used to generate a first time-difference value.
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Abstract
A first communication unit transmits a first signal to a second communication device and concurrently processes the first signal in its receiver. A second communication unit transmits a second signal to the first communication device and concurrently processes the second signal in its receiver. Both communication units use the first and second signals to calculate time difference values that in turn may be used to calculate the distance between the first and second communication units.
11 Citations
20 Claims
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1. A communication system comprising:
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a first communication device; and
a second communication device having a receiver to receive a first signal transmitted by the first communication device and coupled to receive a second signal generated by the second communication device to transmit to the first communication device, where the first and second signals are used to generate a first time-difference value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A communication system comprising:
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a network of base stations; and
a mobile linked to at least one base station to transmit a first signal and use that first signal along with a second signal received from the at least one base station to generate a first time-difference value of the first and second signals. - View Dependent Claims (9, 10, 11, 12)
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13. A method comprising:
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causing a first communication device to transmit a first signal to a second communication device and concurrently process the first signal in a receiver of the first communication device;
receiving a second signal in the receiver of the first communication device that is transmitted by the second communication device; and
calculating a first time difference in the first communication device between the first and second signals. - View Dependent Claims (14, 15, 16, 17)
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18. A method comprising:
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transmitting a first signal from a first communication device to a second communication device and concurrently processing the first signal in a receiver of the first communication device;
transmitting a second signal from the second communication device to the first communication device and concurrently processing the second signal in a receiver of the second communication device;
receiving the first signal in the receiver of the second communication device and the second signal in the receiver of the first communication device; and
calculating a first time difference value in the first communication device and a second time difference in the second communication device based on the first and second signals. - View Dependent Claims (19, 20)
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Specification