Patent ID: 7630432
Filing Date: 2009-12-08
Classification: H04L

Abstract:
1. A method for identifying obstacles in a transmission channel by means of propagation-delay measurement through analysis of a discrete channel impulse response (I k (n)) of the transmission channel using a time-discrete adaptive equalizer connected in series to the transmission channel, the method comprising: determining IIR filter coefficients (a assigning the IIR filter coefficients (a assigning the FIR filter coefficients (b determining a first output vector (A′(n)) from the first input vector (A(n)) and a second output vector (B′(n)) from the second input vector (B(n)) using a discrete Fourier transformation; forming a discrete channel transmission function (H determining the discrete channel impulse response (I determining local maxima of the discrete channel impulse response (I converting the locations in time of the local maxima into corresponding distances of the obstacles relative to a position of a measurement receiver containing the time-discrete adaptive equalizer by multiplication by a transmission rate.