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Arithmetic circuit, signal selection method, and computer program

An arithmetic circuit and signal selection technology, applied in error detection/prevention using signal quality detectors, electrical components, transmission monitoring, etc., can solve the problem that the difference between communication systems is not obvious to users, non-contact communication cannot be performed, and users are inconvenient And other issues

Active Publication Date: 2013-09-11
FELICA NETWORKS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the differences between these communication systems are not apparent to users
Even when devices such as IC cards and mobile phones have been sensed by the reader / writer, if non-contact communication cannot be performed due to the difference in the communication method, the user will feel inconvenient

Method used

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  • Arithmetic circuit, signal selection method, and computer program
  • Arithmetic circuit, signal selection method, and computer program
  • Arithmetic circuit, signal selection method, and computer program

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Embodiment Construction

[0026] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the specification and drawings, the same symbols are used to denote components having substantially the same functions and configurations, and repeated explanations will be omitted.

[0027] In addition, preferred embodiments of the present invention will be described according to the following order.

[0028] 1. An embodiment of the present invention

[0029] 1-1. Arithmetic Circuit Configuration

[0030] 1-2. Configuration of analog amplitude threshold comparison circuit

[0031] 1-3. Signal selection processing

[0032] 1-4. Non-contact communication system

[0033] 2. Conclusion

[0034] 1. An embodiment of the present invention

[0035] 1-1. Arithmetic Circuit Configuration

[0036] First, the configuration of an arithmetic circuit according to an embodiment of the present invention will be described. figure 1 is an explanatory di...

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PUM

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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.

Description

[0001] References to related applications [0002] This application includes subject matter related to that disclosed in Japanese Priority Patent Application No. JP2009-083231 filed with the Japan Patent Office on March 30, 2009, the entire contents of which are hereby incorporated by reference. technical field [0003] The invention relates to an arithmetic circuit, a signal selection method and a computer program. Background technique [0004] Recently, information processing terminals capable of communicating with non-contact reading and writing devices (readers) have been widely used, such as non-contact IC (Integrated Circuit) cards (hereinafter referred to as "IC cards"), and functional mobile phone. The read-write device and the information processing terminal communicate at a specific frequency such as 13.56 MHz using a magnetic field (carrier), and perform transmission and reception of data using the carrier. Non-contact communication systems using information pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04B5/00H04B17/00H04B5/48H04B7/02
CPCH04B7/02H04L1/20H04B17/0045H04B17/327
Inventor 梅岛诚之小野塚克弘市丸典弘川田将吾
Owner FELICA NETWORKS INC