Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1984-10-18
1986-03-18
Blum, Theodore M.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343383, G01S 316, G01S 328
Patent
active
045771936
ABSTRACT:
A coherent sidelobe canceller configured as a linear array antenna system having a digital open-loop configuration comprising signal receiver means having (N+1) channels (N is an integer more than one) comprising a main antenna, N auxiliary antennas, and (N+1) signal receiver circuits connected to (N+1) antennas including said main antenna with a one-to-one relationship, to produce radar video signals; analog-to-digital converter means, each channel being connected to corresponding one of said signal receiving means to convert said radar video signals to digital signals; memory means connected to said analog-to-digital converting means to store said digital signals therein; weighting coefficient calculating means connected to all (N+1) channels of said analog-to-digital converting means to perform statistical calculation processing with respect to time series digital signals, thus calculating weighting coefficients based on statistical characteristic of an input signal; multiplier means having (N+1) channels, each channel being connected to corresponding one of said memory means and said weighting coefficient calculating means to start readout operation from said memory means upon completion of the weighting coefficient calculation, thereby to multiply a weighting coefficient, calculated by said weight coefficient calculation circuit, by digital signals thus read and; adder means for summing output signals from said multiplier means, thereby enabling to suppress interference signal based on real time processing.
REFERENCES:
patent: 4313116 (1982-01-01), Powell et al.
Kiuchi Eiichi
Sawanaka Hiroshi
Tomita Yuichi
Blum Theodore M.
NEC Corporation
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