Method and apparatus for DC offset compensation in a digital...

Details Method and apparatus for DC offset compensation in a digital... Method and apparatus for DC offset compensation in a digital...

2003-09-15

2010-11-23

Tran, Khai (Department: 2611)

Pulse or digital communications

Receivers

Automatic baseline or threshold adjustment

C375S349000

Reexamination Certificate

active

07839956

ABSTRACT:
A method of compensating for dc offset of a received signal transmitted over a channel having a plurality of paths, the received signal comprising a modulated data signal and a modulated known training sequence signal, the method comprising the steps of: constructing (104) from the known training sequence signal a first regression matrix; path-combining (106) the incrementally rotated elements of the first regression matrix to produce the elements of a trend matrix; deriving (108) a neutralized second regression matrix from the first regression matrix and the trend matrix; utilising the neutralized second regression matrix to compensate (110, 112) for dc offset of the received modulated data signal.

REFERENCES:
patent: 6571090 (2003-05-01), Moriyama et al.
patent: 6967992 (2005-11-01), Rabaeijs et al.
patent: WO-01/31867 (2001-05-01), None
Rolf Johansson; “System Modeling and Identification”; Department of Automatic Control Lund Institute of Technology, Prentice Hall, Englewood Cliffs, NJ 07632; pp. 82-85, 126-127, 464-465 2005.
Lindoff, Bengt, “Using A Direct Conversion Receiver In Edge Terminals-A New DC Offset Compensation Algorithm”, 11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications, Sep. 18-21, 2000, (pp. 959-963).

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