Method, device, and radio for compensating for modulator...

H - Electricity – 04 – L

Patent

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Details

H04L 27/12 (2006.01) H03C 3/02 (2006.01) H04B 1/40 (2006.01) H04L 5/16 (2006.01) H04B 1/04 (2006.01)

Patent

CA 2181050

A method (100), a device (300), and a radio (500) are described for compensating for modulator frequency drift while allowing for data transmission in a half-duplex frequency modulated communication system. An adjustment is made to a premodulation signal in such a way that when it is passed through a frequency modulator to provide a transmitter excitation signal, frequency drift is corrected. Subsequent to determining a training command, the transmitter excitation signal passes through a switch to a demodulator. The demodulator output is averaged and used in the adjustment.

L'invention concerne un procédé (100), un dispositif (300) et un appareil radio (500) servant à compenser la dérive de fréquence du modulateur tout en permettant la transmission de données dans un système de communication à modulation de fréquence semi-duplex. Un réglage est effectué sur un signal de prémodulation, de sorte que, lorsqu'on le fait passer à travers un modulateur de fréquence pour fournir un signal d'excitation d'émetteur, la dérive de fréquence soit corrigée. Après détermination d'une instruction d'apprentissage, le signal d'excitation d'émetteur passe à travers un commutateur pour aller jusqu'à un démodulateur. La valeur moyenne du signal de sortie du démodulateur est établie et utilisée pour la réalisation du réglage.

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