Blind scan method, non-transitory computer-readable medium and control circuit thereof
AssigneeRealtek Semiconductor Corp.
InventorChung-Hsuan Hsiao
Life of this patent
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Abstract
A blind scan method includes setting a tuner to scan a first spectrum block with a first center frequency as a center and determining whether the first spectrum block comprises a possible signal; adjusting the tuner to scan a second spectrum block with a second center frequency as the center according to a first rise point and a first drop point when it is determined that the first spectrum block comprises the possible signal; and determining whether the second spectrum block comprises a valid signal.
Claims17
A blind scan method, comprising:
- setting a tuner to scan a first spectrum block with a first center frequency as a center and determining whether the first spectrum block comprises a possible signal;
- setting a threshold value and searching at least one spectrum point intersecting with the threshold value in the first spectrum block to obtain a first rise point or a first drop point, comprising:
- obtaining a first signal intensity value of a left side frequency of the at least one spectrum point and a second signal intensity value of a right side frequency of the at least one spectrum point;
- determining that the at least one spectrum point is the first rise point when the first signal intensity value is smaller than the second signal intensity value;
- and
- determining that the at least one spectrum point is the first drop point when the first signal intensity value is larger than the second signal intensity value;
- adjusting the tuner to scan a second spectrum block with a second center frequency as the center according to the first rise point and the first drop point when it is determined that the first spectrum block comprises the possible signal;
- and
- determining whether the second spectrum block comprises a valid signal.
A nontransitory computer readable medium, wherein the nontransitory computer readable medium has one or more computer programs stored therein, and the one or more computer programs can be executed by one or more processors so as to be configured to operate a method, wherein the method comprises:
- setting a tuner to scan a first spectrum block with a first center frequency as a center and determining whether the first spectrum block comprises a possible signal;
- setting a threshold value and searching at least one spectrum point intersecting with the threshold value in the first spectrum block to obtain a first rise point or a first drop point, comprising:
- obtaining a first signal intensity value of a left side frequency of the at least one spectrum point and a second signal intensity value of a right side frequency of the at least one spectrum point;
- determining that the at least one spectrum point is the first rise point when the first signal intensity value is smaller than the second signal intensity value;
- and
- determining that the at least one spectrum point is the first drop point when the first signal intensity value is larger than the second signal intensity value;
- adjusting the tuner to scan a second spectrum block with a second center frequency as the center according to the first rise point and the first drop point when it is determined that the first spectrum block comprises the possible signal;
- and
- determining whether the second spectrum block comprises a valid signal.
A control circuit, configured to set a tuner to scan a first spectrum block with a first center frequency as a center and to determine whether the first spectrum block comprises a possible signal, to set a threshold value and searching at least one spectrum point intersecting with the threshold value in the first spectrum block to obtain a first rise point or a first drop point, to adjust the tuner to scan a second spectrum block with a second center frequency as the center according to the first rise point and the first drop point when it is determined that the first spectrum block comprises the possible signal, and to determine whether the second spectrum block comprises a valid signal, wherein the control circuit is further configured to:
- obtain a first signal intensity value of a left side frequency of the at least one spectrum point and a second signal intensity value of a right side frequency of the at least one spectrum point;
- determine that the at least one spectrum point is the first rise point when the first signal intensity value is smaller than the second signal intensity value;
- and
- determine that the at least one spectrum point is the first drop point when the first signal intensity value is larger than the second signal intensity value.
Dependencies are inferred from the claim text.