Circuit arrangement for the recognition of adjacent channel interference
AssigneeBlaupunkt-Werke GmbH
InventorMatthias Herrmann
Life of this patent
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Abstract
A circuit arrangement for recognizing adjacent channel interference in a stereo radio receiver, in which a stereo multiplex signal is present. An adjacent channel interference signal is obtained as a function of a direct voltage portion of the stereo multiplex signal and as a function of the spectral components of the stereo multiplex signal above 60 kHz.
Claims18
A circuit arrangement for recognizing adjacent channel interference in a stereo radio receiver in which a stereo multiplex signal is present, comprising a circuit for obtaining an adjacent channel interference signal as a function of a direct voltage portion of the stereo multiplex signal and as a function of spectral components of the stereo multiplex signal above 60 kHz.
A circuit for recognizing adjacent channel interference in a stereo radio receiver including a stereo multiplex signal, comprising:
- a first circuit portion for generating a first auxiliary signal based on a direct voltage portion of the stereo multiplex signal;
- a second circuit portion for generating a second auxiliary signal based on at least one spectral component of the stereo multiplex signal being above a predetermined frequency;
- and
- a third circuit portion for combining the first auxiliary signal and the second auxiliary signal to generate an adjacent channel interference signal indicating adjacent channel interference in the stereo radio receiver.
A circuit for recognizing adjacent channel interference in a stereo radio receiver including a stereo multiplex signal, comprising:
- a first circuit portion for generating a first auxiliary signal based on a direct voltage portion of the stereo multiplex signal;
- a second circuit portion for generating a second auxiliary signal based on at least one spectral component of the stereo multiplex signal being above a predetermined frequency;
- a third circuit portion for combining the first auxiliary signal and the second auxiliary signal to generate an adjacent channel interference signal indicating adjacent channel interference in the stereo radio receiver and
- at least one integrator having at least one input signal and an output signal, the adjacent channel interference signal being one of the at least one input signal, the at least one integrator integrating in one direction when the adjacent channel interference signal has a first value and integrating in an opposite direction when the adjacent channel interference signal has a second value, the at least one integrator output signal providing for damping of audio signals obtained from the stereo multiplex signal so that the damping increases upon integration in the opposite direction.
A method for recognizing adjacent channel interference in a stereo radio receiver including a stereo multiplex signal, comprising the steps of:
- generating a first auxiliary signal based on a direct voltage portion of the stereo multiplex signal;
- generating a second auxiliary signal based on at least one spectral component of the stereo multiplex signal being above a predetermined frequency;
- and
- combining the first auxiliary signal and the second auxiliary signal to form an adjacent channel interference signal indicating adjacent channel interference in the stereo radio receiver.
A method for recognizing adjacent channel interference in a stereo radio receiver including a stereo multiplex signal, comprising the steps of:
- generating a first auxiliary signal based on a direct voltage portion of the stereo multiplex signal;
- generating a second auxiliary signal based on at least one spectral component of the stereo multiplex signal being above a predetermined frequency;
- combining the first auxiliary signal and the second auxiliary signal to form an adjacent channel interference signal indicating adjacent channel interference in the stereo radio receiver;
- and
- integrating the adjacent channel interference signal via an integrator having at least one input signal and an output signal, the adjacent channel interference signal being an input signal, the at least one integrator integrating in one direction when the adjacent channel interference signal has a first value and integrating in an opposite direction when the adjacent channel interference signal has a second value, the at least one integrator output signal providing for damping of audio signals obtained from the stereo multiplex signal so that the damping increases upon integration in the opposite direction.
Dependencies are inferred from the claim text.