Equipment for locating a signal reflection point in a transmissi

Details Equipment for locating a signal reflection point in a transmissi Equipment for locating a signal reflection point in a transmissi

1984-12-05

1987-03-10

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

379 26, G01R 3108

Patent

active

046493352

ABSTRACT:
In an equipment for locating a reflection point in a transmission line a recording is obtained of the impulse response of the path of the echo produced by a transmission signal based on a reference signal x(n) constituted by binary sequences of duration NT which comprise only one bit of non-zero value. At the reception end, the equipment comprises a memory for storing N coefficients Ci which are read cyclically with a view to being modified by successive iterations, each coefficient being modified once per read cycle by the term .alpha..Sgn[e(n)], where Sgn[e(n)] is the sign of the difference between the signal received and the coefficient read at a moment NT and .alpha. is a constant less than 1. The coefficients modified and written into the memory form the values of the desired impulse response.

REFERENCES:
patent: 4041381 (1977-08-01), Hwa
patent: 4210904 (1980-07-01), Renzel et al.
patent: 4577309 (1986-03-01), Barazeche et al.
patent: 4605826 (1986-08-01), Kanemasa

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