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US 10,382,074 B2Granted
Signal filtering and signal processing apparatus and method
AssigneeSamsung Electronics Co., Ltd.
InventorsUi Kun Kwon, Chang Soon Park, Seungkeun Yoon, Sang Joon Kim, Jaechun Lee, Changmok Choi
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Abstract
A signal processing method, a signal filtering apparatus, and a signal processing apparatus are provided. An input signal may be input into a filter having a passband, a superfluous signal of the passband may be output from the filter, and a target signal may be obtained by subtracting the superfluous signal from the input signal.
Claims20
A signal processing method, comprising:
- sending an input signal into a filter having a passband including frequencies lower than a cutoff frequency of a band of interest;
- obtaining a superfluous signal of the passband through the filter;
- obtaining a target signal, for the band of interest, by subtracting the superfluous signal from the input signal;
- determining whether a compensation for an estimated direct current (DC) offset is to be performed on the target signal, based on a comparison of a frequency of the target signal to a threshold frequency;
- and
- performing the compensation for the estimated DC offset based on a result of the determining.
3 more elements
A signal filtering apparatus, comprising:
- a direct current (DC) offset estimator configured to estimate a DC offset in a raw signal;
- an adder-subtractor configured to provide an input signal by subtracting the estimated DC offset from the raw signal;
- a filter comprising a passband including frequencies lower than a cutoff frequency of a band of interest, and configured to extract a superfluous signal from the input signal;
- a subtractor configured to obtain a target signal by subtracting the superfluous signal from the input signal, and to output the target signal for the band of interest;
- and
- a DC offset compensation determiner configured to determine whether to compensate for the estimated DC offset, based on a comparison of a frequency of the target signal to a threshold frequency.
3 more elements
A signal processing method, comprising:
- estimating a direct current (DC) offset from a raw signal;
- generating an input signal by subtracting the DC offset from the raw signal;
- sending the input signal into a filter having a passband including frequencies lower than a cutoff frequency of a band of interest to obtain a superfluous signal;
- obtaining a target signal, for the band of interest, by subtracting the superfluous signal from the input signal;
- and
- compensating for a DC offset on the target signal, in response to the target signal having a frequency lower than a threshold frequency.
3 more elements
A signal filtering apparatus comprising:
- a filter configured to extract a superfluous signal based on an input signal applied to a passband of the filter including frequencies lower than a cutoff frequency of a band of interest;
- a delay compensator configured to compensate the input signal for a time delay in obtaining the superfluous signal;
- a subtractor configured to obtain a target signal, for the band of interest, by subtracting the superfluous signal from the compensated input signal;
- and
- an adder-subtractor configured to perform DC compensation for an estimated direct current (DC) offset on the target signal, in response to the target signal having a frequency lower than a threshold frequency.
2 more elements
Dependencies are inferred from the claim text.