Abstract: In state of the art baseband methods, the range in the access area decreases with increasing transmission speed. When a limit is reached with a predetermined distance and a selected speed, it is no longer possible to change over to an even greater speed. Otherwise, the synchronism between the transmitter and receiver is lost. The invention resolves this deficiency by combining the features of broadband technology with an acknowledged message exchange by means of which the parameters can be controlled between the transmitter and the receiver.

Abstract: In state of the art baseband methods, the range in the access area decreases with increasing transmission speed. When a limit is reached with a predetermined distance and a selected speed, it is no longer possible to change over to an even greater speed. Otherwise, the synchronism between the transmitter and receiver is lost. The invention resolves this deficiency by combining the features of broadband technology with an acknowledged message exchange by means of which the parameters can be controlled between the transmitter and the receiver.

Abstract: A circuit arrangement for a frequency-dependent analysis of received signals which lie in a wide overall frequency band utilizes a filter bank which cooperates with an evaluation circuit. The filter bank has frequency-dependent band filters connected thereto and comprises an evaluation frequency range which exhibits only a few small band width in relation to the overall frequency band. The received signals are processed by means of a filter circuit having adjoining pass ranges, the signals being modulated by a number of frequency modulators into an evaluation frequency range and an addition of the individual heterodyning frequency values is performed.

Abstract: A three-dimensional air space surveillance radar in which the radar receiver is connected to a target tracking means which stores target data and does extrapolation of target data for target trace formations, including a panoramic antenna which illuminates the entire elevation range to be covered and has a reception lobe at the elevation level which can be electronically or mechanically controlled such that a line air space scanning occurs during the course of normally sequence scanning programs. The line-shaped beam of the antenna is briefly interrupted in the invention from the normal reception lobe elevation angle when the tracker determines that a target echo is expected from a different elevation angle than that being scanned.