Signal processing apparatus, signal processing method and communication apparatus
AssigneeSony Corporation
InventorKatsuaki Takahashi
Life of this patent
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Abstract
Disclosed herein is a signal processing apparatus including: a voltage-controlled oscillation block having a parameter high in correlation with a filter; a measuring block configured to measure an oscillation frequency of the voltage-controlled oscillation block; and a control block configured to control the parameter of the filter by use of a measuring result of the oscillation frequency obtained by the measuring block.
Claims19
A signal processing apparatus comprising:
- a voltage-controlled oscillation block having a parameter that is correlated with a parameter of a filter;
- a measuring block configured to measure an oscillation frequency of the voltage-controlled oscillation block;
- and
- a control block configured to control the parameter of the filter by use of a measuring result of the oscillation frequency obtained by the measuring block,
- wherein the control block computes a fluctuation coefficient by use of a frequency measuring result obtained by the measuring block and a standard sample frequency measuring result, and controls the parameter of the filter by use of the computed fluctuation coefficient.
A signal processing method for a signal processing apparatus, the method executed by the signal processing apparatus, comprising:
- measuring an oscillation frequency of a voltage-controlled oscillation block having a parameter that is correlated with a parameter of a filter;
- computing a fluctuation coefficient by using a result of the measuring of the oscillation frequency and a standard sample frequency measuring result;
- and
- controlling the parameter of the filter by use of the computed fluctuation coefficient.
A communication apparatus comprising:
- a reception block configured to receive a signal;
- a filter configured to extract a predetermined frequency component from the signal received by the reception block;
- a voltage-controlled oscillation block having a parameter that is correlated with a parameter of the filter;
- a measuring block configured to measure an oscillation frequency of the voltage-controlled oscillation block;
- and
- a control block configured to control the parameter of the filter by use of a measuring result of the oscillation frequency obtained by the measuring block,
- wherein the control block computes a fluctuation coefficient by use of a frequency measuring result obtained by the measuring block and a standard sample frequency measuring result, and controls the parameter of the filter by use of the computed fluctuation coefficient.
A communication apparatus comprising:
- a receiver circuit that receives a signal;
- a filter that is downstream of the receiver circuit and that extracts a portion of the received signal;
- a voltage-controlled oscillator that has a parameter that is correlated with a parameter of the filter and that outputs an oscillation signal;
- a mixer that is downstream of the filter and mixes the received signal with the oscillation signal;
- a measuring circuit that measures an oscillation frequency of the voltage-controlled oscillator;
- and
- a control circuit that computes a fluctuation coefficient by use of a frequency measuring result obtained by the measuring circuit and a standard sample frequency measuring result, and variably controls the parameter of the filter by using the computed fluctuation coefficient.
Dependencies are inferred from the claim text.