Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2011-01-18
2011-01-18
Ghebretinsae, Temesghen (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C455S562100
Reexamination Certificate
active
07873127
ABSTRACT:
Sample vectors of a signal received simultaneously by an array of antennas are processed to estimate a weight for each sample vector that maximizes the energy of the individual sample vector that resulted from propagation of the signal from a known source and/or minimizes the energy of the sample vector that resulted from interference with propagation of the signal from the known source. Each sample vector is combined with the weight that is estimated for the respective sample vector to provide a plurality of weighted sample vectors. The plurality of weighted sample vectors are summed to provide a resultant weighted sample vector for the received signal. The weight for each sample vector is estimated by processing the sample vector in accordance with the expression:minw_,c_X*Yw_-(C0c_0+Cc_)pwherec0=1 and 0<p≦∞. The processing of the sample vector to estimate the weightw, includes a step of calculating a pseudoinverse (ZX*Y)+. The pseudoinverse is calculated by a simplified method.
REFERENCES:
patent: 6404803 (2002-06-01), Wang et al.
patent: 2004/0142665 (2004-07-01), Papathanasion et al.
Callan Edward W.
Ghebretinsae Temesghen
L-3 Communications Titan Corporation
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