Telecommunications – Transmitter and receiver at separate stations – Frequency or phase modulation
Reexamination Certificate
2011-06-28
2011-06-28
Pham, Tuan A (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Frequency or phase modulation
C455S061000, C455S023000, C455S201000, C455S108000, C375S241000, C375S242000, C375S268000
Reexamination Certificate
active
07970354
ABSTRACT:
Systems and methods are disclosed for an electronically adjustable signal filter system, which comprises, in some embodiments, a first filter coupled to an antenna coupling network and a second filter, a power amplifier coupled to the first filter, an antenna connected to an antenna coupling network, a pilot tone generator coupled to the first filter, and a first signal source connected to the power amplifier and first filter. In some embodiments, the power amplifier amplifies the first signal, the first filter places a notch into the first signal transmitted to the antenna coupling network, the antenna coupling network combines the first signal and a second signal received from the antenna and transmits a third signal to the second filter.
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Nicholls Charles
Roussel Alain
Carroll Rodney B.
Conley & Rose, P.C.
Nortel Networks Limited
Pham Tuan A
Tiegerman Bernard
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