Patent ID: 6885954
Filing Date: 2005-04-26
Classification: G01R,H04B,H04L,Y04S

Abstract:
1. A method for performing time domain reflectometry on a communication channel comprising: obtaining a first complementary signal; transmitting the first complementary signal over a communication channel; receiving a first reflection signal from the communication channel in response to the transmitting of the first complementary signal; correlating the first reflection signal with the first complementary signals to generate a first correlated signal; obtaining a second complementary signal; transmitting the second complementary signal over a communication channel; receiving a second reflection signal from the communication channel in response to the transmitting of the second complementary signal; correlating the second reflection signal with the second complementary signal to generate a second correlated signal; processing the first correlated signal and the second correlated signal to generate a combined correlated signal; determining a point of alignment between the transmitted signals and the combined correlated signal; measuring a time interval between the point of alignment and a subsequent peak in the combined correlated signal; and multiplying the time interval by the rate of propagation of the sequence signal through the communication channel to obtain distance information regarding a line anomaly.