Method and device for monitoring carrier frequency stability...

Details Method and device for monitoring carrier frequency stability... Method and device for monitoring carrier frequency stability...

2004-10-20

2010-02-23

Payne, David C (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S259000

Reexamination Certificate

active

07668245

ABSTRACT:
The method for monitoring the stability of the carrier frequency (ωi) of identical transmitted signals (si(t)) of several transmitters Siof a single-frequency network is based upon a calculation of a carrier-frequency displacement Δωiof a carrier frequency ωiof a transmitter Sirelative to a carrier frequency ω0of a reference transmitter S0. For this purpose, the phase-displacement difference (ΔΔΘi(tB2−tB1)) caused by the carrier-frequency displacement Δωibetween a phase displacement ΔΘi(tB1) at a first observation time tB1and a phase displacement ΔΘi(tB2) at a second observation time tB2of a received signal (ei(t)) of the transmitter Siassociated with the respective transmitted signal (si(t)) is determined relative to a received signal e0(t) of the reference transmitter S0associated with the reference transmitted signal s0(t).

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Search report, Apr. 28, 2005.

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