CCD range-doppler processor

Details CCD range-doppler processor CCD range-doppler processor

1975-11-06

1977-04-05

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 5DP, G01S 942

Patent

active

040165671

ABSTRACT:
Signal processing wherein signals are processed using chirp-Z-transform (CZT) techniques and charge transfer device (CTD) transversal filters. The chirp weighting signal may be amplitude modulated to achieve signal apodization and may be generated by impulsing a CTD complex filter having an appropriate impulse response. Signal premultiplication using a one-bit quantized chirp signal is described.
Application of these techniques to doppler range processing apparatus wherein radar returns are premultiplied to provide up-chirp multiplied time samples prior to being inputted into a CTD range buffer. Each bit of the CTD has an associated CTD chirp Z-transform complex filter the outputs from each of which are summed and squared. The range bins and the associated complex filters are provided on a common semiconductor chip together with peripheral circuitry.

REFERENCES:
patent: 3720950 (1973-03-01), Vehrs
patent: 3787852 (1974-01-01), Pockette et al.

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