Title:
COMPLEX BANDPASS ΔΣAD MODULATOR AND DIGITAL RADIO RECEIVER
Document Type and Number:
WIPO Patent Application WO/2010/101058
Kind Code:
A1
Abstract:
Provided is a complex bandpass ΔΣAD modulator capable of suppressing influence to a signal component of an image component caused by the mismatch between the I-channel and the Q-channel, with a low power consumption.
The complex bandpass ΔΣAD modulator (10) is configured by a subtraction unit (20), a complex bandpass filter (30), an addition unit (40), a noise extraction circuit unit (50), an ADC unit (60), and a DAC unit (70). The noise extraction circuit unit (50) extracts a quantized noise signal of the ADC unit (60) on the basis of an input signal of the ADC unit (60) and an output signal of the DAC unit (70), delays the extracted quantized noise signal by one sample time, phase-rotates the delayed signal by a predetermined angle, and feedbacks the rotated signal to an input side of the ADC unit (60).
Inventors:
SAN HAO (JP)
KOBAYASHI HARUO (JP)
KOBAYASHI HARUO (JP)
Application Number:
PCT/JP2010/052873
Publication Date:
September 10, 2010
Filing Date:
February 24, 2010
Export Citation:
Assignee:
UNIV GUNMA NAT UNIV CORP (JP)
SAN HAO (JP)
KOBAYASHI HARUO (JP)
SAN HAO (JP)
KOBAYASHI HARUO (JP)
International Classes:
H03M3/02; H03H19/00
Foreign References:
| JP2006352455A | 2006-12-28 | |||
| JP2006013705A | 2006-01-12 | |||
| JP2002527978A | 2002-08-27 | |||
| JP3970266B2 | 2007-09-05 | |||
| JP3992287B2 | 2007-10-17 | |||
| JP2006013705A | 2006-01-12 | |||
| JP2006352455A | 2006-12-28 |
Other References:
"2008.MWSCAS 2008.51st Midwest Symposium on", August 2008, article HAO SAN ET AL.: "Complex Bandpass DELTASIGMAAD Modulator with Noise-coupled Architecture, Circuits and Systems", pages: 486 - 489, XP031315273
HAJIME KOHASE ET AL.: "Tomoshito MURAYAMA, Yukihiro NISHIDA, "Noise Ketsugogata Feedforward DELTASIGMAAD Henchoki no Teian"", THE 21ST WORKSHOP ON CIRCUITS AND SYSTEMS IN KARUIZAWA RONBUNSHU, 21 April 2008 (2008-04-21), pages 69 - 74
See also references of EP 2405580A4
K. W. MARTIN: "Complex Signal Processing is Not Complex", IEEE TRANS. ON CIRCUITS SYST. I, vol. 51, no. 9, September 2004 (2004-09-01), pages 1823 - 1836
HAO SAN, HARUO KOBAYASHI: "Complex Bandpass ??AD Modulator with Noise-coupled Architecture", PROCEEDINGS OF IEICE GENERAL. CONFERENCE ON FUNDAMENTALS, 2008, pages A-1 - 9
HAO SAN, HARUO KOBAYASHI: "Complex Bandpass ??AD Modulator with Noise-coupled Architecture", PROCEEDINGS OF THE 21ST KARUIZAWA WORKSHOP ON CIRCUITS AND SYSTEMS, 2008, pages 75 - 80
S. JANTZI ET AL.: "Quadrature bandpass ?? modulator for digital radio", IEEE JOURNAL OF SOLID--STATE CIRCUITS, vol. 32, December 1997 (1997-12-01), pages 1935 - 1949
HAJIME KOHASE ET AL.: "Tomoshito MURAYAMA, Yukihiro NISHIDA, "Noise Ketsugogata Feedforward DELTASIGMAAD Henchoki no Teian"", THE 21ST WORKSHOP ON CIRCUITS AND SYSTEMS IN KARUIZAWA RONBUNSHU, 21 April 2008 (2008-04-21), pages 69 - 74
See also references of EP 2405580A4
K. W. MARTIN: "Complex Signal Processing is Not Complex", IEEE TRANS. ON CIRCUITS SYST. I, vol. 51, no. 9, September 2004 (2004-09-01), pages 1823 - 1836
HAO SAN, HARUO KOBAYASHI: "Complex Bandpass ??AD Modulator with Noise-coupled Architecture", PROCEEDINGS OF IEICE GENERAL. CONFERENCE ON FUNDAMENTALS, 2008, pages A-1 - 9
HAO SAN, HARUO KOBAYASHI: "Complex Bandpass ??AD Modulator with Noise-coupled Architecture", PROCEEDINGS OF THE 21ST KARUIZAWA WORKSHOP ON CIRCUITS AND SYSTEMS, 2008, pages 75 - 80
S. JANTZI ET AL.: "Quadrature bandpass ?? modulator for digital radio", IEEE JOURNAL OF SOLID--STATE CIRCUITS, vol. 32, December 1997 (1997-12-01), pages 1935 - 1949
Attorney, Agent or Firm:
Shin-yu International Patent Firm (JP)
Patent business corporation Nobutomo international patent firm (JP)
Patent business corporation Nobutomo international patent firm (JP)
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