Communications: directive radio wave systems and devices (e.g. – Return signal controls radar system – Receiver
Patent
1986-12-23
1989-06-13
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls radar system
Receiver
342 90, G01S 1354
Patent
active
048396559
ABSTRACT:
A radar system includes N Doppler filters (N is an integer larger than 1), N CFAR (Constant False Alarm Rate) processing means, a video selector, automatic target detecting means, a video integrator, and a D/A converter. The N CFAR processing means are respectively connected to output terminals of the Doppler filters and automatically adapt amplitude distribution characteristics of a signal, such as clutter and receiver noise, and convert the signal into a signal having the same amplitude distribution characteristics as the receiver noise and suppressing the converted signal. The video selector is connected to output terminals of the N CFAR processing means and selects an output signal from any one thereof in units of radar range bins and synthesizes an N channel signals into a single channel signal. The automatic target detecting means is connected to an output terminal of the video selector. The video integrator is connected to an output terminal of the video selector and generates a signal at each transmission pulse by interpolating a single Doppler filter output signal for each M (.gtoreq.N) transmission pulses. The D/A converter is connected to the video integrator and generates an analog video signal.
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Johnson et al., "On Characterizing the Performance of Modified CFAR Radar Processors in the Presence of Non-Homogeneous Interference", Proc. of 1984 Int'l Symposium on Noise and Clutter Rejection in Radars and Imaging Sensors, IECE, 1984, pp. 285-290.
NEC Corporation
Swann Tod
Tarcza Thomas H.
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