Abstract: A distributed reflectometry device for diagnosing a network is disclosed. According to one aspect, the device includes at least one transmission line and several reflectometers connected to the network. A transmission portion of the device includes a first memory configured to store at least one test signal and a second memory configured to store weighting coefficients. The transmission portion may also include a first multiplier of a test signal (s) with a coefficient ?m, for producing a measurement m and a digital-to-analog converter connected to the line. A reception portion of the device includes an analog-to-digital converter configured to receive a signal from the line and provide a vector for the measurement m, a second multiplier of configured to multiply the vector with the coefficient ?m, an averaging module, and a post-processing and analysis module.

Abstract: A multi-carrier reflectometry device and method for on-line diagnosis of at least one transmission line. The device includes: a transmission part that includes successively: a module for parameterizing a test signal SF, such that: sF=[0,c1ej?1,c2ej?2, . . . ,CN/2-1ej?N/2-1,CN/2,CN/2-1ej?N/2-1,cN/2-2ej?N/2-2, . . . ,c1ej?1]T, a module for synthesizing the test signal by inverse discrete Fourier transform, and a digital to analog converter, connected to the line; and a detection part that includes successively: an analog to digital converter connected to this transmission line, a discrete Fourier transform module, and an analysis module containing a deconvolution module, which also receives the test signal sF.

Abstract: A distributed reflectometry device for diagnosing a network is disclosed. According to one aspect, the device includes at least one transmission line and several reflectometers connected to the network. A transmission portion of the device includes a first memory configured to store at least one test signal and a second memory configured to store weighting coefficients. The transmission portion may also include a first multiplier of a test signal (s) with a coefficient ?m, for producing a measurement m and a digital-to-analog converter connected to the line. A reception portion of the device includes an analog-to-digital converter configured to receive a signal from the line and provide a vector for the measurement m, a second multiplier of configured to multiply the vector with the coefficient ?m, an averaging module, and a post-processing and analysis module.

Abstract: A multi-carrier reflectometry device and method for on-line diagnosis of at least one transmission line. The device includes: a transmission part that includes successively: a module for parameterizing a test signal SF, such that: sF=[0, c1ej?1, c2ej?2, . . . , CN/2-1ej?N/2-1, CN/2, CN/2-1ej?N/2-1, cN/2-2ej?N/2-2, . . . , c1ej?1]T, a module for synthesising the test signal by inverse discrete Fourier transform, and a digital to analog converter, connected to the line; and a detection part that includes successively: an analog to digital converter connected to this transmission line, a discrete Fourier transform module, and an analysis module containing a deconvolution module, which also receives the test signal sF.