Arithmetic circuit, signal selection method, and computer program
AssigneeFeliCa Networks, Inc.
InventorsMasayuki Umejima, Katsuhiro Onozuka, Norihiro Ichimaru, Shogo Kawata
Life of this patent
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Abstract
An arithmetic circuit includes: a detection unit that detects a code error for plural signals respectively modulated by different modulation methods and encoded by a predetermined encoding method; a measurement unit that measures a number of times of signal variations at a predetermined frequency or less generated in the plural signals in a period from detection of the code error in the detection unit to first detection of predetermined data contained in the plural signals with respect to each of the plural signals; and a selection unit that selects one signal from the plural signals based on a measurement result of the measurement unit.
Claims9
An arithmetic circuit comprising:
- a detection unit that detects a code error for plural signals respectively modulated by different modulation methods and encoded by a predetermined encoding method;
- a measurement unit that measures a number of times of signal variations at a predetermined frequency or less generated in the plural signals in a period from detection of the code error in the detection unit to first detection of predetermined data contained in the plural signals with respect to each of the plural signals;
- and
- a selection unit that selects one signal from the plural signals based on a measurement result of the measurement unit.
A signal selection method comprising the steps of:
- a detection step of detecting a code error for plural signals respectively modulated by different modulation methods and encoded by a predetermined encoding method;
- a measurement step of measuring a number of times of signal variations at a predetermined frequency or less generated in the plural signals in a period from detection of the code error in the detection step and first detection of predetermined data contained in the plural signals with respect to each of the plural signals;
- and
- a selection step of selecting one signal from the plural signals based on a measurement result of the measurement step.
A computer program for allowing a computer to execute the steps of:
- a detection step of detecting a code error for plural signals respectively modulated by different modulation methods and encoded by a predetermined encoding method;
- a measurement step of measuring a number of times of signal variations at a predetermined frequency or less generated in the plural signals in a period from detection of the code error in the detection step and first detection of predetermined data contained in the plural signals with respect to each of the plural signals;
- and
- a selection step of selecting one signal from the plural signals based on a measurement result of the measurement step.
Dependencies are inferred from the claim text.