Computation of decision feedback equalizer coefficients with...

Details Computation of decision feedback equalizer coefficients with... Computation of decision feedback equalizer coefficients with...

2008-06-03

2008-06-03

Phu, Phuong (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

C375S232000, C375S234000, C375S229000, C708S322000, C708S323000

Reexamination Certificate

active

07382827

ABSTRACT:
Directly computing Feed Forward Equalizer (FFE) coefficients and Feed Back Equalizer (FBE) coefficients of a Decision Feedback Equalizer (DFE) from a channel estimate. The FBE coefficients have an energy constraint. A recursive least squares problem is formulated based upon the DFE configuration, the channel estimate, and the FBE energy constraint. The recursive least squares problem is solved to yield the FFE coefficients. The FFE coefficients are convolved with a convolution matrix that is based upon the channel estimate to yield the FBE coefficients. A solution to the recursive least squares problem is interpreted as a Kalman gain vector. A Kalman gain vector solution to the recursive least squares problem may be determined using a Fast Transversal Filter (FTF) algorithm.

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