Direct conversion receiver with DC offset compensation

Details Direct conversion receiver with DC offset compensation Direct conversion receiver with DC offset compensation

2005-09-29

2008-08-05

Phu, Sanh D (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C455S063100, C455S209000, C455S280000, C455S190100, C455S231000

Reexamination Certificate

active

07409199

ABSTRACT:
A direct conversion receiver includes a mixer for converting an RF signal into a baseband signal, a dynamic DC offset compensator for compensating for a dynamic DC offset caused by the effect of second order nonlinear distortion of the mixer on an interfering wave that enters the input terminals of the mixer, and a static DC offset compensator for compensating for a static DC offset caused by self-mixing of a local signal and a leakage component of the local signal that appears at the input terminals of the mixer. The static DC offset compensation starts at a time t1after a DC offset compensation operation has started. The static DC offset compensation is finished at the next time t2, and then the dynamic DC offset compensation starts. The dynamic DC offset compensation is finished at the next time t3. With this configuration, only a change in DC offset due to the dynamic DC offset is compensated after compensating for the static DC offset component. The dynamic DC offset compensator does not have an element for storing the magnitude of the static DC offset.

REFERENCES:
patent: 6535725 (2003-03-01), Hatcher et al.
patent: 2002/0160740 (2002-10-01), Hatcher et al.
patent: 2004/0087296 (2004-05-01), Park et al.
patent: 2006/0068749 (2006-03-01), Ismail et al.
patent: 2006/0141972 (2006-06-01), Matsuno

Affiliated with

Also associated with

Rating

Direct conversion receiver with DC offset compensation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Direct conversion receiver with DC offset compensation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct conversion receiver with DC offset compensation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4009242