Telecommunications – Transmitter – Including tuning
Patent
1985-04-30
1986-09-16
Ng, Jin F.
Telecommunications
Transmitter
Including tuning
455129, 455284, 333 17M, 343861, H04B 102, H03G 1104
Patent
active
046126694
ABSTRACT:
A system for adjusting the antenna matching network of a radio system in the presence of an interfering signal in the matching network being adjusted comprises a loop from which the interfering signal is cancelled by an adaptive interference cancellation (AIC) system. The AIC system receives an interference sensor signal having the frequency of the interfering signal. Means responsive to the interference sensor signal and phase and amplitude control signals provides a modified interference sensor signal having a phase and amplitude determined by the control signals. This modified interference sensor signal is combined with a mismatch signal which is derived from the signal in the matching network to produce a modified mismatch signal. An adaptive interference cancellation processor is responsive to the modified mismatch signal for providing the phase and amplitude control signals of values to reduce the amplitude of the interfering signal frequency in the modified mismatch signal relative to its amplitude in the mismatch signal. An adjustment processor responds to the modified mismatch signal to control an impedance adjuster for adjusting the impedance of the matching network.
REFERENCES:
patent: 3160832 (1964-12-01), Beitman
patent: 3160833 (1964-12-01), Ludvigson et al.
patent: 3355667 (1967-11-01), Bruene
patent: 4201960 (1980-05-01), Skutta et al.
patent: 4297641 (1981-10-01), Sterzer
patent: 4485360 (1984-11-01), Seward
patent: 4493112 (1985-01-01), Bruene
"Adaptive Noise Cancelling: Principles and Applications" by: Woodrow et al., Proceedings of the IEEE, vol. 63, #12, Dec. 1975, pp. 1692-1716.
Ng Jin F.
Ochis Robert
RCA Corporation
Tripoli Joseph S.
Troike Robert L.
LandOfFree
Antenna matching system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Antenna matching system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antenna matching system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1999094