Title:
SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, AND RECEIVING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/114948
Kind Code:
A1
Abstract:
The present invention relates to a signal processing device, signal processing method and receiving device, with which reply information can be detected with high accuracy from a carrier signal that is load-modulated in accordance with the reply information. A positive direct-current generating section (61) generates a positive threshold value based on a load-modulated carrier signal. A positive selection section (62) outputs, to an addition section (65), the larger of the values obtained by comparing the voltage of the carrier signal with the positive threshold value. A negative direct-current generating section (63) generates a negative threshold value based on the load-modulated carrier signal. A negative selection section (64) outputs, to the addition section (65), the smaller of the values obtained by comparing the voltage of the carrier signal with the negative threshold value. The addition section (65) adds the output of the positive selection section (62) and the output of the negative selection section (64), and outputs the result of this addition to an IQ detection section (53). As the result of this addition, a signal is obtained having a Vpp that is smaller than the original carrier signal and a voltage fluctuation portion that is maintained. The present invention can be applied to non-contact communication systems.
Inventors:
FUKUDA SHINICHI (JP)
NAKANO HIROAKI (JP)
NAKANO HIROAKI (JP)
Application Number:
PCT/JP2012/053437
Publication Date:
August 30, 2012
Filing Date:
February 14, 2012
Export Citation:
Assignee:
SONY CORP (JP)
FUKUDA SHINICHI (JP)
NAKANO HIROAKI (JP)
FUKUDA SHINICHI (JP)
NAKANO HIROAKI (JP)
International Classes:
G06K17/00; H04B5/02
Foreign References:
| JP2006074579A | 2006-03-16 | |||
| JP2004102404A | 2004-04-02 | |||
| JP2008061218A | 2008-03-13 | |||
| JP2001307031A | 2001-11-02 |
Other References:
See also references of EP 2665019A4
Attorney, Agent or Firm:
INAMOTO Yoshio et al. (JP)
Yoshio Inemoto (JP)
Yoshio Inemoto (JP)
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Claims: