Title:
SIGNAL GENERATING DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/027570
Kind Code:
A1
Abstract:
The purpose of the present invention is to obtain a signal generating device capable of generating an interpolation signal without the need for increased memory capacity, even in cases in which an interpolated value approximating a true value is obtained. The device is provided with: a digital filter unit (1) for interpolation of an input signal and output of a first interpolation signal; a digital filter unit (2) for interpolation of the first interpolation signal and output of a second interpolation signal; a phase calculation unit (3) for calculating the phase of a digital signal; a phase accuracy conversion unit (4) for calculating a first phase signal and a second phase signal; a memory (5) for storing filter coefficients; a coefficient readout unit (6) for reading out filter coefficients from the memory (5), and switching the filter coefficient of the digital filter unit (1); a phase error calculation unit (7) for calculating a phase error signal; a memory (8) for storing filter coefficients; a coefficient readout unit (9) for reading out filter coefficients from the memory (8); and a gain normalization unit (10) for performing gain normalization of filter coefficients to obtain a fixed sum of the filter coefficients, and for switching the filter coefficient of the digital filter unit (2).
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Inventors:
IURA HIROKI (JP)
TOMITSUKA KOJI (JP)
TOMITSUKA KOJI (JP)
Application Number:
PCT/JP2013/070737
Publication Date:
February 20, 2014
Filing Date:
July 31, 2013
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H03H17/00
Domestic Patent References:
| WO2011090110A1 | 2011-07-28 |
Foreign References:
| JP2004274624A | 2004-09-30 | |||
| JP2000312187A | 2000-11-07 | |||
| JPH05327409A | 1993-12-10 | |||
| JPH10285124A | 1998-10-23 | |||
| JPH07202633A | 1995-08-04 |
Other References:
YOSHIKAZU NISHIMURA: "Communication System Design by Digital Signal Processing", 2006, CQ PUBLISHING CO., LTD.
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
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