Charge coupled device signal processing apparatus using chirp-Z-

Details Charge coupled device signal processing apparatus using chirp-Z- Charge coupled device signal processing apparatus using chirp-Z-

1974-06-26

1976-03-02

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307233R, 328167, 333 70T, 343 77, G11C 1900, H03H 710, G01S 942

Patent

active

039420353

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: 3546490 (1970-12-01), Sangster
patent: 3720950 (1973-03-01), Vehrs, Jr.
patent: 3787852 (1974-01-01), Puckette
patent: 3819958 (1974-06-01), Gosney
"A Computer for Obtaining Z Transforms," in IEEE Transactions on Audio and Electroacoustics, Mar. 1972, pp. 98-99.
"The Chirp Z-Transform Algorithm," by Rabinger et al. in IEEE Transactions on Audio and Electroacoustics, June 1969, pp. 86-92.

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