Title:
RECEIVER APPARATUS, IMAGE SIGNAL ATTENUATING METHOD, AND MISMATCH COMPENSATING METHOD
Document Type and Number:
WIPO Patent Application WO/2010/073720
Kind Code:
A1
Abstract:
The degree of removal of unwanted component signals can be improved using a small area without the need for using any high frequency signal source. IF band simulated image signals (IM-I, IM-Q) outputted by an IF band simulated image signal generating unit (12) are inputted to a quadrature mixer (14) via a path switch (13). The signals (IM-I, IM-Q) are then outputted by the quadrature mixer (14) to a complex filter (16) via feed-through, and then outputted by the complex filter (16) to an amplitude determining unit (17), which determines the amplitudes of the signals (IM-I, IM-Q). An element value control unit (18) then controls, based on the determined amplitudes, the element values of the constituent elements of the complex filter (16) in such a manner that the amplitudes become smaller.
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| JPH10294685 | OPERATION FREQUENCY SELECTING SYSTEM |
Inventors:
KITSUNEZUKA MASAKI (JP)
Application Number:
PCT/JP2009/007301
Publication Date:
July 01, 2010
Filing Date:
December 25, 2009
Export Citation:
Assignee:
NEC CORP (JP)
KITSUNEZUKA MASAKI (JP)
KITSUNEZUKA MASAKI (JP)
International Classes:
H04B1/26; H03D7/18; H04L27/38
Foreign References:
| JP2006157866A | 2006-06-15 | |||
| JP2006101388A | 2006-04-13 | |||
| JPH06104807A | 1994-04-15 |
Attorney, Agent or Firm:
IEIRI, Takeshi (JP)
家入健 (JP)
家入健 (JP)
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