Title:
COMPLEX SIGNAL PROCESSING CIRCUIT, RECEIVER CIRCUIT, AND SIGNAL REPRODUCING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2011/114393
Kind Code:
A1
Abstract:
An analog complex filter (101) synthesizes an in-phase signal (I0) and a quadrature signal (Q0) to output analog signals (I1, Q1). Analog/digital converters (102i, 102q) convert the analog signals (I1, Q1) to digital signals (I2, Q2). A digital complex filter (103) attenuates those components of the digital signals (I2, Q2) which correspond to the in-phase and quadrature signals (I0, Q0). A digital band limiting filter (104) passes therethrough the target components and image components included in the digital complex signals constituted by the digital signals (I3, Q3) from the digital complex filter (103), while attenuating the adjacent interfering components. An IQ imbalance correcting circuit (105) corrects the orthogonality error and amplitude error between the digital signals (I4, Q4) from the digital band-pass filter (104).
Inventors:
SENOUE FUMIAKI
NAGANO KOUICHI
NAGANO KOUICHI
Application Number:
PCT/JP2010/004525
Publication Date:
September 22, 2011
Filing Date:
July 13, 2010
Export Citation:
Assignee:
PANASONIC CORP (JP)
SENOUE FUMIAKI
NAGANO KOUICHI
SENOUE FUMIAKI
NAGANO KOUICHI
International Classes:
H03D7/18; H04L27/38; H04B1/16; H04B1/26
Domestic Patent References:
| WO2010035359A1 | 2010-04-01 |
Foreign References:
| JP2006094252A | 2006-04-06 | |||
| JP2007104522A | 2007-04-19 | |||
| JP2003283255A | 2003-10-03 | |||
| JP2004522363A | 2004-07-22 | |||
| JP2006094245A | 2006-04-06 |
Attorney, Agent or Firm:
MAEDA, Hiroshi et al. (JP)
Hiroshi Maeda (JP)
Hiroshi Maeda (JP)
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Claims: