Abstract: A method for adaptive target processing in a vehicle the radar involves first detecting targets in the monitored environment with respect to their speed and location in a standard mode of the radar sensor, and then switching to a precision mode, in which the distance measuring range of the radar sensor is adapted to the target surroundings detected in the standard mode. More particularly, the measuring accuracy and/or resolution regarding speed is increased by increasing the time of observation within the distance measuring range adapted to the target surroundings.

Abstract: The invention relates to a method for adaptive target processing in a vehicle radar, the targets in the surroundings being detected by speed and place in the standard mode of the radar sensor, after detection of the targets in the standard mode it is being changed over to a precision mode, in which the distance measuring range of the radar sensor is adapted to the target surroundings detected in the standard mode. In accordance with the present invention the measuring accuracy and/or resolution regarding speed is increased by increasing the time of observation within the distance measuring range adapted to the target surroundings.

Abstract: In a method for the determination of the unambiguous range for the measurement of the IF deviation in a frequency-regulated radar system, a frequency adjustment or tuning of the radar system is carried out during the reception of an echo signal by adjustingly setting respectively at least one value for the IF deviation around the value zero in the unambiguous range of the IF deviation as well as in an ambiguous range of the IF deviation. Then, the unambiguous range is recognized as such by comparison of the signal amplitude and/or the number of the detected targets during these adjustment settings, because the unambiguous range exhibits the highest signal amplitude and/or the greatest number of detected targets (i.e. echo signals).

Abstract: A method for simulating echo signals for Doppler radar systems having a radar signal transmitted by a first Doppler radar system and received by a second Doppler radar system wherein the signal is subjected to the action of a Doppler frequency shift based upon switching of either an antennae changeover switch or a transmitting and receiving changeover switch at a frequency equivalent to the Doppler frequency shift to be generated and sent back as a simulated echo signal.

Abstract: In a method for the precise angle determination of targets by means of a multiple unit antenna radar system, individual antenna patterns are generated in separate directions by at least three feeds (F−1, F0, F1) which are spatially offset with respect to one another and which illuminate a joint collimator (R). By simultaneous and phase-correct excitation of several of the feeds, at least two combination antenna diagrams are generated, by means of which the angle determination takes place. The intersecting points of the combination antenna diagrams, are situated in angle ranges in which the exact angle determination is desired.

Abstract: The invention relates to a process for determining the deviation of the intermediate frequency from a given reference frequency (f.sub.R) in the case of a frequency-pulse radar system, characterized bythe time-related scanning of the echo signal such that, from an echo pulse of an individual target, several scanning values are obtained at different, preferably equidistant points in time within the echo pulse,the Doppler filtering by way of the thus obtained scanning values of an individual target so that several Doppler signals of the same frequency are obtained from the same target from whose phase differences the intermediate-frequency deviation is determined.

Abstract: Apparatus for use in establishing a security system having a tour route which is followed by a guard, and having a plurality of tour stations spaced along the tour route. An electronic tour key is carried by the guard to each of the tour stations on the tour route for plug-in electrical connection therewith. Address codes are set in the tour stations and the electronic tour key for identifying a specified tour route and specific stations along the tour route. A tour information signal is generated by the electronic tour key after plug-in electrical connections have been made with a predetermined number of tour stations. The tour information signal is connected to a means for receiving such signals and for transmitting security information to a remote monitoring station. Programming and verifying means are provided for setting predetermined tour station address codes and for subsequently verifying tour station address codes and address codes which have been preset in the electronic tour key.