Title:
SIGNAL PROCESSING DEVICE AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/170486
Kind Code:
A1
Abstract:
The present invention suppresses the decline of the signal strength of a higher harmonic component included in the output of a ΔΣ modulator. To this end, a signal processing device is equipped with: a ΔΣ modulator (11) for outputting a pulse signal; a first processing unit (12) for generating a discontinuous pulse signal (PC) in which the rear end and/or front end of each pulse interval of the pulse signal (PO) outputted by the ΔΣ modulator (11) are/is set to a low-level region; and a second processing unit for generating a short-width pulse signal (PS) which has a shorter pulse width than that of the discontinuous pulse signal (PC) generated by the first processing unit (12).
Inventors:
MAEHATA TAKASHI (JP)
Application Number:
PCT/JP2015/052284
Publication Date:
November 12, 2015
Filing Date:
January 28, 2015
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
H03M3/02; H04L27/00
Domestic Patent References:
| WO2010064723A1 | 2010-06-10 |
Foreign References:
| JP2014014066A | 2014-01-23 | |||
| JP2008205733A | 2008-09-04 | |||
| JP2013098976A | 2013-05-20 | |||
| JPH11225049A | 1999-08-17 | |||
| JP2013081106A | 2013-05-02 |
Other References:
TAKASHI MAEHATA ET AL.: "Digitally Enhanced Harmonic Transmitter of 1-bit Bandpass DELTASIGMA Modulator", IEICE TECHNICAL REPORT, vol. 114, no. 179, 12 August 2014 (2014-08-12), pages 11 - 14
Attorney, Agent or Firm:
SunCrest Patent and Trademark Attorneys (JP)
Patent business corporation Sun Crest international patent firm (JP)
Patent business corporation Sun Crest international patent firm (JP)
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