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Systems and methods for loop length and bridged tap length determination of a transmission line

  • US 8,094,703 B2
  • Filed: 10/12/2010
  • Issued: 01/10/2012
  • Est. Priority Date: 01/07/2000
  • Status: Expired due to Fees
First Claim
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1. A loop length estimation system comprising:

  • a controller; and

    a loop length output device capable of;

    estimating a channel transfer function using one or more signals from an initialization, the initialization occurring between a first multicarrier modem on a first end of a transmission line and a second multicarrier modem on a second end of the transmission line, the one or more signals from the initialization having been transmitted or received using a multiplicity of discrete frequency carriers;

    determining a theoretical channel transfer function of the transmission line;

    comparing the theoretical channel transfer function and the estimated channel transfer function; and

    determining an estimated loop length of the transmission line based upon said comparison,wherein the theoretical transfer function has as an input a parameter related to a gauge of the transmission line.

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