Method and system for tracking and mitigating DC offset in...

Details Method and system for tracking and mitigating DC offset in... Method and system for tracking and mitigating DC offset in...

2006-04-25

2006-04-25

Urban, Edward F. (Department: 2685)

Telecommunications

Transmitter and receiver at separate stations

Distortion, noise, or other interference prevention,...

C455S226100, C455S296000, C375S231000, C375S326000, C375S319000

Reexamination Certificate

active

07035589

ABSTRACT:
A method and system for reducing the DC offset in a receiver in the presence of carrier frequency offset between the transmitter and the receiver. The present invention utilizes the knowledge of the carrier frequency offset to determine the phase difference between two (or more) snapshots of the same transmitted symbol. The receiver DC offset is solved for using a linear system solver which can be implemented outside the analog domain. The DC offset may be tracked in order to maintain a constant adjust of the DC offset, which in combination with the above DC offset estimation technique implements a complete solution for the DC offset cancellation problem.

REFERENCES:
patent: 5732113 (1998-03-01), Schmidl et al.
patent: 6400778 (2002-06-01), Matui
patent: 2002/0001354 (2002-01-01), McNally
patent: 2003/0152021 (2003-08-01), Wang et al.

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