Radar detection and signal processing circuit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 16, 1986
Grant Date -
N/A
app pub date -
Apr 27, 1984
filing date -
Jan 6, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Radar detection and signal processing circuits are provided where, following a front end having an RF and local oscillator mixer to an I.F., which is then further mixed against a signal from a swept frequency oscillator, in the presence of a microwave frequency signal, the output of a band pass filter goes to a detector for frequency modulated intermediate frequency signals, and that detector has at least a first output signal that is fed to two pairs of complementary paired comparators, the outputs of which are set to low and high threshold levels. The first pair of complementary comparators has a low threshold level output which is examined by a microprocessor for the incidence of detected low threshold signal in a number of spaced cells--as determined by a clock which divides the detector output into time cells of the sweep period of the swept oscillator. Signal processing is provided so that the incidence of signals in a pair of spaced cells over a given number of consecutive sweeps causes an alarm. Likewise, a high threshold output is examined so that the incidence of a detected high threshold signal in a pair of spaced cells over a different, lower number of consecutive sweeps, causes an alarm. The sensitivity of the circuit may adjust up or down according to the number of low threshold signals that are detected; or dynamically if too many low threshold signals are detected in a small group of time cells.
First Claim
Other Claims data not available