Communications: directive radio wave systems and devices (e.g. – Determining velocity – Combined with determining acceleration
Patent
1989-12-08
1991-05-14
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Determining velocity
Combined with determining acceleration
342 70, 342115, G01S 1360
Patent
active
050160176
ABSTRACT:
A Doppler radar speed detecting method in which periods of a Doppler signal are measured within a predetermined sampling time, and frequency data corresponding to the thus obtained period data are obtained. Upper and lower limit values are set based on the previous Doppler frequency F(k-1). The frequency data are compared with these limit values. Frequency data within a low region lower than the lower limit value, and intermedaite region between the lower and upper limit values, and a high region higher than the upper limit value are respectively counted in accordance with the comparison. Further, for the frequency data between the lower and upper limits, an integrated value of differences between these data and the previous Doppler frequency is obtained. From these integrated value and the numbers of frequency data, the change from the previous to the present Doppler frequency is calculated. By adding this change and the previous Doppler frequency together, the present Doppler frequency is obtained.
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Kodera Masao
Mikami Seishin
Sasaki Kunihiko
Utsu Jyunshi
Nippon Soken Inc.
Sotomayor John B.
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