Methods and systems for the estimation of the injection point of foreign signals in a network
First Claim
1. A method for estimating a location of an injection point of foreign signals in a network, said method comprising the steps of:
- obtaining a first signal sample at a first location in the network;
obtaining a second signal sample at a second location in the network;
correlating the two signal samples; and
establishing the location of the injection point from the correlation result.
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Accused Products
Abstract
A method and system for estimating the location of an injection point of foreign signals in a network comprises the steps of measuring signal samples at two points along the cable network distribution system, correlating the two signal samples to estimate propagation delay differences between the measurement locations and the source, and calculating the location and magnitude of the ingress. The propagation delay, or time correlation, is proportional to the offset of the injection point from the midpoint between the measurement sites, where the two parameters are related by the velocity of propagation in the cable. The amplitude of the correlation peaks represent the magnitude of the ingress at that location. Sensitivity may be increased by time-averaging the output of the correlation step. Multiple sources and/or ingress and egress sites may be measured simultaneously.
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Citations
24 Claims
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1. A method for estimating a location of an injection point of foreign signals in a network, said method comprising the steps of:
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obtaining a first signal sample at a first location in the network;
obtaining a second signal sample at a second location in the network;
correlating the two signal samples; and
establishing the location of the injection point from the correlation result. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for estimating a location of an injection point of foreign signals in a network, said system comprising:
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means for obtaining a first signal sample at a first location in the network;
means for obtaining a second signal sample at a second location in the network;
means for correlating the two signal samples; and
means for establishing the location of the injection point from the correlation result. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification