Communications: directive radio wave systems and devices (e.g. – Presence detection only
Reexamination Certificate
2004-12-20
2008-12-09
Gregory, Bernarr E (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Presence detection only
C342S028000, C342S070000, C342S089000, C342S094000, C342S104000, C342S105000, C342S107000, C342S108000, C342S109000, C342S110000, C342S118000, C342S134000, C342S135000, C342S136000, C342S159000, C342S175000, C342S194000, C342S195000
Reexamination Certificate
active
07463181
ABSTRACT:
In a method for suppressing interferences while detecting objects in a target area, a transmitter transmits a sequence of pulses into the target area, and a receiver detects the resulting reflection signal of the pulses reflected from the objects, within successive time windows that are referenced to the moment of transmitting an individual pulse and thus represent distance gates. The time spacing between the successive individual pulses is variable and randomized according to the pseudo-noise principle within predetermined limits, and the time windows are adapted accordingly. The received reflection signal may be sampled, digitized, digitally pre-processed and digitally filtered in the individual distance gates. A non-linear digital filter, preferably a sliding median filter, is used for the filtering to suppress transient disturbances. The median is determined from an odd number of consecutive sampled values of a reflection signal detected within a distance gate.
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A.D.C. Automotive Distance Control Systems GmbH
Fasse W. F.
Fasse W. G.
Gregory Bernarr E
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