Device for compensating for a mismatch of a transmitter and...

Details Device for compensating for a mismatch of a transmitter and... Device for compensating for a mismatch of a transmitter and...

2007-07-17

2007-07-17

Urban, Edward F. (Department: 2618)

Telecommunications

Transmitter

Noise or interference elimination

C455S115100, C455S118000

Reexamination Certificate

active

10842859

ABSTRACT:
A device for compensating for a mismatch of a transmitter and a method of compensating for the mismatch is provided. The device for compensating for a mismatch of an up-converter in a direct conversion transmitter, comprises: a mismatch compensating unit for compensating for an input signal using a first mismatch compensation value to generate a mismatch compensation signal; a down-converter for down-converting a radio frequency (RF) signal to generate an intermediate frequency (IF) signal, the RF signal being generated by up-converting the mismatch compensation signal; a square unit for squaring the IF signal; and a controller for calibrating the first mismatch compensation value to determine a second mismatch compensation value such that a direct current (DC) component of the squared IF signal has a minimum value to compensate for the mismatch of the up-converter using the second mismatch compensation value.

REFERENCES:
patent: 6330290 (2001-12-01), Glas
patent: 7020447 (2006-03-01), Nagatani et al.
patent: 2002/0177425 (2002-11-01), Li
patent: 2003/0143966 (2003-07-01), Kim et al.
patent: 2004/0038649 (2004-02-01), Lin et al.
patent: 2004/0137869 (2004-07-01), Kim
patent: 2004/0142667 (2004-07-01), Lochhead et al.
patent: 2005/0118963 (2005-06-01), Chiu

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