Active radar system and method

摘要

The present invention relates to an active radar system and a corresponding method. The proposed system comprises at least two transmit antennas that each transmits radiation to a scene as a transmit signal, said transmit signal comprising a series of frequency modulated pulses, at least one receive antenna that receives radiation from said scene as a receive signal, a controller that controls said at least two transmit antennas. The transmissions of the transmit signals are subsequently initiated with time offsets, controlled to be larger than the time delay between transmission of a first transmit signal of said two transmit signals and reception of radiation of said first transmit signal by said at least one receive antenna and to be smaller than the time duration of a complete frequency modulated pulse of said first transmit signal.

主权项

1. An active radar system, comprising:
at least two transmit antennas configured to transmit radiation to a scene as at least a first transmit signal and at least a second transmit signal, respectively, each transmit signal comprising a series of frequency modulated pulses; at least one receive antenna configured to receive radiation from said scene as at least one receive signal; a controller configured to control at least one of said at least two transmit antennas such that a first transmission of the at least first transmit signal and the at least second transmit signal is initiated with a time offset, such that the time offset is controlled to be larger than a time delay between the transmission of the at least first transmit signal and reception of radiation of said at least first transmit signal received by said at least one receive antenna, and to be smaller than a time duration of a complete frequency modulated pulse of said at least first transmit signal; and signal analyser configured to analyse said at least one receive signal to determine the time delay, wherein said controller is further configured to control the time offset for at least a subsequently initiated transmission of said at least first transmit signal and said at least second transmit signal based on the determined time delay.