Digital radio repeater with regenerator
AssigneeThomson-CSF
InventorAlain Huriau
Life of this patent
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Abstract
The transparency to the operating signals of a digital signal radio link repeater is obtained by using a demodulator with a carrier signal recovery circuit, whose band width is determined in such a way that the regenerated carrier signal is used in the reconstitution of the modulated signal, after regeneration of the digital train, whilst transmitting the original modulation by the operating signals.
Claims4
A radio repeater transmitting a carrier signal modulated in phase, with n phase states, by a digital signal and in angle by operating signals and comprising in series a phase demodulator, a digital signal regenerating device and a phase modulator with n phase states having a modulation input and a carrier signal input, the phase demodulator being a coherent demodulator comprising a phase comparator having a first input receiving the modulated carrier signal and a second input, a carrier recovery circuit having an input and an output respectively connected to the first and second inputs of the comparator, the pass band of the carrier regenerating circuit being at least equal to the frequency spectrum due to the angle modulation by the operating signals, and the recovery circuit output also being connected to the carrier signal input of the phase modulator.
Dependencies are inferred from the claim text.