Multicarrier reflectometry device and method for on-line diagnosis of at least one transmission line

A multicarrier reflectometry device for on-line diagnosis of at least one transmission line, comprising:

• a transmission part connected to the transmission line, which comprises successively:
• a module for parameterizing a test signal SF, such that:
• sF=[0, c1ejθ1, c2ejθ2, . . . , CN/2-1ejθN/2-1, CN/2, CN/2-1ejθN/2-1, cN/2-2ejθN/2-2, . . . , c1ejθ1]T,
• a module for synthesising this test signal by inverse discrete Fourier transform, and
• a digital to analog converter, connected to the transmission line, which delivers to the transmission line an analog test signal x(t) that is a periodic signal;
• a detection part, connected to the transmission line, which comprises successively:
• an analog to digital converter, connected to the transmission line, which receives a measured signal xs(t) and digitizes the measured signal 8xs(t),
• a discrete Fourier transform module, and
• an analysis module containing a deconvolution module, which performs a post-processing of the measured signal thus transformed using the test signal SF and which makes it possible to estimate the transmission response h(t), such that xs(t)=x(t)*h(t), * representing the convolution product.

A multicarrier reflectometry method for on-line diagnosis of at least one transmission line, comprising:

• in a transmission in the transmission line:
• parameterizing a test signal SF such that:
• sF=[0, c1ejθ1, c2ejθ2, . . . , CN/2-1ejθN/2-1, CN/2, CN/2-1ejθN/2-1, cN/2-2ejθN/2-2, . . . , c1ejθ1]T,
• synthesising the test signal by inverse discrete Fourier transform, and
• digital to analog conversion that delivers to the transmission line an analog test signal x(t) that is a periodic signal;
• in a detection for the transmission line:
• analog to digital conversion of the measured signal xs(t) connected to this transmission line,
• a discrete Fourier transform,
• analysis enabling a deconvolution, which effects a post-processing of the signal thus transformed using the test signal sF and which makes it possible to estimate the response h(t) of the transmission line, such that xs(t)=x(t)*h(t), * representing a convolution product.