Telecommunications – Carrier wave repeater or relay system – Transmitter/receiver feedback compensation
Patent
1998-10-15
2000-11-28
Vo, Nguyen
Telecommunications
Carrier wave repeater or relay system
Transmitter/receiver feedback compensation
455 63, H04B 117
Patent
active
061546348
ABSTRACT:
The invention concerns a communications system including at least one transmit antenna near at least one receive antenna, transmission producing signals in the receive frequency band. The system includes a transmit neutralizing circuit for supplying a correction signal for eliminating only interfering signals whose frequency is in the receive signal frequency band. The transmit neutralizing circuit is on the input side of an amplifier and comprises means for evaluating, in the wanted receive frequency band, a limited number of parameters of the power amplifier feeding the transmit antenna, this evaluation of parameters being effected on the basis of the input and output signals of the amplifier. The circuit also evaluates the signals causing the interference prior to the input of the amplifier; this evaluation of the interfering signals is based on the calculated parameters and the signal at the input of the amplifier. Application to transmission systems on ships or spacecraft.
REFERENCES:
patent: 4952193 (1990-08-01), Talwar
patent: 5049832 (1991-09-01), Cavers
Broux Denis
Broyer Jean
Dezelak Nadia
Marguinaud Andre
Alcatel
Mehrpour N.
Vo Nguyen
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