Patent ID: 8390507
Filing Date: 2013-03-05
Classification: G01S,H01Q

Abstract:
1. A radar system for recording the environment of a motor vehicle, comprising: transmission means for emitting transmission signals using one or more 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 received signals are acquired from different combinations of transmitter and receiver antennas, a relative phase center, which is defined as the sum of the two vectors from a reference point to the phase centers of the respective transmitter antenna and receiver antenna, being assigned to each combination; the transmitter and receiver antennas used in said combination have at least approximately the same emission characteristics and the emission characteristics of said transmitter antennas can be different from those of said receiver antennas; the position of the relative phase centers of said combinations of transmitter and receiver antennas with regard to a spatial direction S that runs perpendicular to a spatial direction R varies periodically with the period length P, when a series of said combinations of transmitter and receiver antennas, which is arranged in the spatial direction R with regard to the position of the relative phase centers, is viewed; and in the signal processing means it is utilized that the received signals from an object have a phase portion that alternates with the period length P over the combinations of transmitter and receiver antennas arranged as above, depending on the angular position of said object in the spatial direction S, which is used to make assertions about the position of objects in the spatial direction S.