Distance measurement between two nodes of a radio network
First Claim
1. A method, comprising:
- transmitting, by a first node, a first carrier signal;
receiving, from a second node, a second carrier signal;
measuring, by the first node, a first value and a second value of a first phase, the first value of the first phase assigned to a first frequency of the received second carrier signal and the second value of the first phase assigned to a second frequency of the received second carrier signal, the first frequency and the second frequency having a frequency difference, a third value of a second phase assigned to a third frequency of the first carrier signal, a fourth value of the second phase assigned to a fourth frequency of the first carrier signal, the third frequency and the fourth frequency having the frequency difference; and
determining a distance between the first node and the second node from the frequency difference from the first value and the second value of the first phase and from the third value and the fourth value of the second phase.
18 Assignments
0 Petitions
Accused Products
Abstract
A method includes transmitting, by a first node, a first carrier signal and receiving, from a second node, which receives the first carrier signal, a second carrier signal. The first node measures first and second values of a first phase, the first value assigned to a first frequency of the second carrier signal and the second value assigned to a second frequency of the second carrier signal. The first and second frequencies have a frequency difference. A third value of a second phase is assigned to a third frequency of the first carrier signal, and a fourth value of the second phase is assigned to a fourth frequency of the first carrier signal. The third and fourth frequencies have the frequency difference. A distance between the first and second nodes is determined from the frequency difference from the first and second values and from the third and fourth values.
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Citations
19 Claims
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1. A method, comprising:
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transmitting, by a first node, a first carrier signal; receiving, from a second node, a second carrier signal; measuring, by the first node, a first value and a second value of a first phase, the first value of the first phase assigned to a first frequency of the received second carrier signal and the second value of the first phase assigned to a second frequency of the received second carrier signal, the first frequency and the second frequency having a frequency difference, a third value of a second phase assigned to a third frequency of the first carrier signal, a fourth value of the second phase assigned to a fourth frequency of the first carrier signal, the third frequency and the fourth frequency having the frequency difference; and determining a distance between the first node and the second node from the frequency difference from the first value and the second value of the first phase and from the third value and the fourth value of the second phase. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A first node of a radio network, the first node comprising:
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a transmitter circuit configured to transmit a first carrier signal; a receiver circuit configured to receive, from a second node, a second carrier signal; a first phase measurement unit configured to measure a first value and a second value of a first phase, the first value of the first phase assigned to a first frequency of the received second carrier signal and the second value of the first phase assigned to a second frequency of the received second carrier signal, the first frequency and the second frequency having a frequency difference, a third value of a second phase assigned to a third frequency of the first carrier signal, a fourth value of the second phase assigned to a fourth frequency of the first carrier signal, the third frequency and the fourth frequency having the frequency difference; and circuitry configured to determine a distance between the first node and the second node from the frequency difference from the first value and the second value of the first phase and from the third value and the fourth value of a second phase. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification