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AssigneePowerwave Technologies, Inc.
InventorsRichard D. Posner, Kwang Kim, Stefan Klein, Wayne Roberts, Gregory French
Estimating the term…
A method and apparatus reduce the out-of-band frequency components of an RF amplified signal, preferably a CDMA signal, which has a carrier frequency which is not known in advance. The apparatus and method feature locating the frequency of the incoming signal by examining an RF output signal having both in-band frequency components and out-of-band frequency components. Typically the output signal is generated using a high-power, Class A/B amplifier. Once the frequency of the carrier has been determined, the out-of-band components are used to generate control signals which, in, for example, a feedback or feedforward circuitry, reduce the energy of the out-of-band signals and thereby provide a more linear amplifier transfer function.
Apparatus for reducing out-of-band frequency components of an RF signal having a carrier frequency which is not known in advance, and having both in-band frequency components and the out-of band frequency components, such apparatus comprising:
A method of reducing out-of-band-frequency components introduced into an RF signal having in-band frequency components, having a carrier frequency not known in advance, by a signal processing network with adjustable electrical characteristics, the method comprising:
Apparatus for reducing distortion components introduced into an input signal by passing such signal through an amplifier operating with a non-linear output signal versus input signal transfer characteristic, such signal having a bandwidth centered about a carrier frequency not known in advance, such distortion components being at frequencies outside the bandwidth, the apparatus comprising:
Dependencies are inferred from the claim text.