Patent ID: 8436763
Filing Date: 2013-05-07
Classification: G01S,H01Q

Abstract:
1. A radar system for recording the environment of a motor vehicle, comprising: transmission means for emitting transmission signals using at least two transmitter antennas; receiving means for receiving transmission signals reflected by objects using one or more receiver antenna; and signal processing means for processing the received signals, characterized in that there are transmitter and receiver antennas that are planar and are situated on a level surface; said transmitter antennas all respectively have at least approximately the same first emission characteristic, said receiver antennas all respectively have at least approximately the same second emission characteristic, wherein the first emission characteristic can be different from the second emission characteristic; received signals are acquired from different combinations of the transmitter and receiver antennas; in the signal processing means, the angular position in a spatial direction R is estimated for objects from said received signals, using the fact that the received signals from an individual object have different phase positions in relation to one another depending on the angular position of said object in the spatial direction R; and at least two of said transmitter and receiver antennas overlap with regard to the spatial direction R without being identical, said overlap being obtained by at least one of the following arrangements or configurations of these transmitter and receiver antennas: a) the antennas are offset in relation to one another with regard to the spatial direction S that runs perpendicular to the spatial direction R which is a horizontal spatial direction R, whereby the transmitter antennas are positioned above the receiver antennas; b) the transmitter and/or the receiver antennas have an oblique sloping form with regard to the spatial direction R; c) the antennas are interleaved with regard to the spatial direction R; d) at least two antennas consist of a plurality of emitting or receiving elements, and emitting or receiving elements are used in common jointly by at least two transmitter or receiver antennas.