Invention Application
- Patent Title: WIRELESS RECEIVER WITH NOTCH FILTER TO REDUCE EFFECTS OF TRANSMIT SIGNAL LEAKAGE
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Application No.: PCT/US2008/056711Application Date: 2008-03-12
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Publication No.: WO2008112800A3Publication Date: 2008-09-18
- Inventor: CHANG, Li-Chung , GUDEM, Prasad S. , CABANILLAS, Jose
- Applicant: QUALCOMM INCORPORATED , CHANG, Li-Chung , GUDEM, Prasad S. , CABANILLAS, Jose
- Applicant Address: Attn: International IP Administration 5775 Morehouse Drive San Diego, California 92121-1714 US
- Assignee: QUALCOMM INCORPORATED,CHANG, Li-Chung,GUDEM, Prasad S.,CABANILLAS, Jose
- Current Assignee: QUALCOMM INCORPORATED,CHANG, Li-Chung,GUDEM, Prasad S.,CABANILLAS, Jose
- Current Assignee Address: Attn: International IP Administration 5775 Morehouse Drive San Diego, California 92121-1714 US
- Agency: MOBARHAN, Ramin
- Priority: US60/894,546 20070313; US11/777,249 20070712
- Main IPC: H04B1/52
- IPC: H04B1/52 ; H04B1/10
Abstract:
This disclosure describes techniques for reducing adverse effects of TX signal leakage in a full-duplex, wireless communication device. The techniques make use of a notch filter to reject TX signal leakage in a signal processed in the RX path of the wireless communication device. The notch filter may be constructed as a complex notch filter using passive resistor and capacitor components to produce a notch frequency that attenuates TX signal leakage components in a desired signal. The notch filter may be applied to a down-converted, baseband signal produced by a passive mixer.
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