Apparatus and method of local oscillator leakage cancellation

Details Apparatus and method of local oscillator leakage cancellation Apparatus and method of local oscillator leakage cancellation

2005-08-26

2008-10-21

Nguyen, Simon D (Department: 2618)

Telecommunications

Transmitter

C455S114200, C455S118000, C455S127200, C375S296000

Reexamination Certificate

active

07440732

ABSTRACT:
A transmitter includes a first mixer to generate a first output signal by up-converting a first baseband signal having a first DC offset component. A second mixer generates a second output signal by up-converting a second baseband signal having a second DC offset component. The second output signal is subtracted from the first output signal to generate a transmitter output signal. The transmitter output signal includes a local oscillator (LO) leakage signal caused by the first and/or second DC offset components. A third mixer produces a third output signal by up-converting the first DC offset component. A fourth mixer produces a fourth output signal by up-converting the second DC offset component. The fourth output signal is subtracted from the third output signal to generate a LO leakage cancellation signal. The LO leakage cancellation signal is subtracted from the transmitter output signal, thereby reducing a power of the LO leakage signal.

REFERENCES:
patent: 5012208 (1991-04-01), Makinen et al.
patent: 5396196 (1995-03-01), Blodgett
patent: 5675286 (1997-10-01), Baker et al.
patent: 5903823 (1999-05-01), Moriyama et al.
patent: 6169463 (2001-01-01), Mohindra et al.
patent: 6704551 (2004-03-01), Riou et al.
patent: 7206557 (2007-04-01), Aytur et al.
patent: 7280805 (2007-10-01), Xu et al.
patent: 2002/0191713 (2002-12-01), McVey
patent: 2006/0063497 (2006-03-01), Nielsen
patent: 2006/0252392 (2006-11-01), Beamish et al.
patent: 2007/0042728 (2007-02-01), Pan

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