Method of monitoring an area, and a device for carrying out the method

US5497157A · kind A · utility

Assignee

• Deutsche Aerospace AG · DE

Inventors

• Wilhelm Gruener · Ulm, DE
• Tiang-Gwan Liem · Ulm, DE

Key dates

• Filing date: Aug 22, 1994
• Grant date: Mar 5, 1996
• Expiry date: Aug 22, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S13/913
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Monitoring an area with the aid of a frequency-modulated continuous-wave radar includes emitting a frequency-modulated continuous-wave transmitting signal with at least one transmitting antenna having a directional pattern whose main azimuthal direction depends on the frequency of the transmitting signal. Related to a predeterminable direction, an azimuthal region is selected, and in the selected region, an azimuthal swivelling of the directional pattern of the transmitting antenna is carried out by changing the frequency of the transmitting signal. Also in the selected region, each azimuthal value is assigned a frequency value of the transmitting signal. The selected region is divided into a predeterminable number of azimuthal increments adjoining one another, and in each of the increments, a monotonous change of the frequency of the transmitting signal occurs. A reflected portion of the transmitting signal, which is reflected by the area to be monitored, is received with a receiving antenna, and a coherent signal processing for evaluating the receiving signal for each increment coherent signal processing is carried out.