Non-phase shifting bidimensional filter

Details Non-phase shifting bidimensional filter Non-phase shifting bidimensional filter

2006-12-19

2006-12-19

Mai, Tan V. (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

07152085

ABSTRACT:
A band-pass filter with at least one passband, which is real, bidimensional, oriented along the phase axis and resulting from the product of two identical one-dimensional Hamming windows, the transfer function of each of these windows being:Xi⁡(f)=αi+(1-αi)⁢cos⁢π⁡(f-f⁢⁢qi)f0i,w⁢⁢h⁢⁢e⁢⁢r⁢⁢ef is a current frequency;αi is a real number, included between and excluding 0 and 1;fqi is a central frequency of the passband; andf0i defines half of the passband centered on fqi.

REFERENCES:
patent: 5373460 (1994-12-01), Marks, II
patent: 5572596 (1996-11-01), Wildes et al.
patent: 6119139 (2000-09-01), Dyba
French Search Report from French Patent Application No. 01/13519, filed Oct. 19, 2001.

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