Communications: directive radio wave systems and devices (e.g. – With particular circuit – For pulse modulation
Patent
1983-11-09
1987-05-19
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
For pulse modulation
342195, 342194, G01S 730
Patent
active
046672001
ABSTRACT:
A pulse radar apparatus is provided with a coherent transmitting and receiving unit (1) for the transmission of radar pulses, the reception of echo signals, and the conversion of the echo signals into signals of an intermediate frequency f.sub.if, which may be shifted through a Doppler frequency f.sub.d. The echo signals with frequency f.sub.if +f.sub.d are fed to a detector (7) for the coherent phase detection with a frequency f.sub.if +f.sub.c. The detected signals are fed to an analog-to-digital converter (10), which operates at a frequency of approximately 4f.sub.c. The pulse radar apparatus further includes accumulators (12, 13), alternately fed with the output signals of the analog-to-digital converter (10) each time for a given period, after which period the output signals of the accumulators (12, 13) are representative of the orthogonally detected components of the echo signals.
REFERENCES:
patent: 3927405 (1975-12-01), Poinsard et al.
patent: 3987442 (1976-10-01), McLeod, Jr.
patent: 4333080 (1982-06-01), Collins et al.
patent: 4344040 (1982-08-01), Reilly et al.
M. Skolnik, Intro. To Radar Systems; p. 119-121, (McGraw-Hill, 1980).
Gellekink Bernard
Hol Willem A.
Gregory Bernarr Earl
Hollandse Signaalapparten B.V.
Kraus Robert J.
Tarcza Thomas H.
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