Patent ID: 8958466
Filing Date: 2015-02-17
Classification: H04B,H04L,H04M

Abstract:
1. A modem-based upstream data loop length and bridged tap length estimation system comprising: a reverb signal determination device configured to determine a measured transfer function by averaging a plurality of consecutive frames of a reverb signal; a controller configured to determine a frequency domain propagation function for a specified wire gauge input from a storage device; an impedance determination device configured to determine a frequency domain impedance of the specified wire gauge; the controller further configured to: a modem identification determining device configured to determine an identification of the CO modem collecting the reverb signal, and the identification of the CPE modem transmitting the reverb signal, wherein since the number of elements in a receive function is known, the controller is further configured to minimize a difference between the actual transfer function and the measured transfer function, and output, with the cooperation of a loop length output device and a bridged tap output device, the estimated loop length and the estimated bridged tap length, respectively.