Method and circuitry for determining the beginning of echo pulse

Details Method and circuitry for determining the beginning of echo pulse Method and circuitry for determining the beginning of echo pulse

1993-12-30

1995-07-25

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By pulse coincidence

327 37, 327 72, 327 74, H03K 522

Patent

active

054365805

ABSTRACT:
A method and circuit for accurately determining the leading edge timing of a pulse of high frequency carrier signal at a receiver which substantially simultaneously receives the same pulse over multiple transmission paths resulting in distortion of the pulse envelope. The amplitude of the pulse envelope is compared with the amplitude of the derivative of the pulse envelope and with a reference threshold amplitude. The leading edge of a pulse is indicated when the amplitude of the pulse envelope exceeds both the amplitude of the derivative and the reference threshold.

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patent: 4823227 (1989-04-01), Grant
patent: 5185686 (1993-02-01), Hansen et al.

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