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AssigneeHarris Corporation
InventorsTravis Lee Berrier, Roy Lujan Soto, Wayne Kwok-Wai Wong
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A frequency domain reflectometry-based bridged tap detection system for a telecommunication wireline employs a prescribed filtering operator, such as a ‘best-fit’ curve filter or a piecewise high pass filter bank, upstream of a Fourier processing operator, to improve the signal-to-noise ratio of the digitized amplitude array of the swept frequency band. To fit the response tones within the dynamic range of the analog-to-digital converter that digitizes the response tones detected from the wireline, a signal conditioning circuit, comprised of a comb filter bank, envelope detector and compander, is installed between the test head and the input to the analog-to-digital converter.
A method of automatically identifying the position of each of at least one energy reflection location along a wireline telecommunication link comprising the steps of:
A frequency domain reflectometry-based bridged tap detection system for a telecommunication wireline comprising a precursor filter, installed upstream of a frequency domain reflectometry processor containing a Fast Fourier Transform operator, said precursor filter being configured to increase the signal-to-noise ratio of digitized amplitudes, produced by an analog-to-digital converter, of the response signal of said wireline as detected by a test head to the application to said wireline of a swept frequency band signal thereto, and further including a signal conditioning circuit, comprised of a comb filter bank, envelope detector and compander, installed between said test head and said analog-to-digital converter.
A system for automatically identifying energy reflection discontinuities along a wireline telecommunication link comprising a test signal generator that is operative to couple a varying frequency waveform to a measurement location of said wireline telecommunications link, in response to which said wireline propagates said varying frequency waveform to said energy reflection discontinuities, said energy reflection discontinuities reflecting energy back to said measurement location, a line monitoring receiver coupled to said measurement location of said wireline telecommunications link, a precursor filter that is operative to filter the response signal output of said line monitoring receiver, so as to increase the signal-to-noise ratio of high frequency components of said response signal output, and a response signal processor which is operative to execute a frequency domain reflectometry (FDR) algorithm to analyze the filtered response signal output of said precursor filter, and generate an output representative of locations of said energy reflection discontinuities.
Dependencies are inferred from the claim text.