Patent ID: 7646335

Claim:
A radar device, comprising: a transmit part, a receive part, a control unit for control of at least one of the transmit and receive parts, the transmit part including means for generating a transmit signal within a certain band and with a certain duration, and the receive part comprising a first filter, an analogue-to-digital converter, and a Fourier transform unit, wherein the control unit is arranged to let the transmit part generate a group of transmit signals, each signal in the group having a first bandwidth between a first and a second frequency and a certain signal duration, with the first and second frequencies of at least one signal in the group being different from those of another transmitted signal in the group, so that a second larger bandwidth is covered by the group than by an individual signal in the group, the receive part being open for reception over said second bandwidth of the group during reception of each signal in said group, wherein the transmit part comprises means for creating Fourier Transform copies of the transmitted signals, and means for creating conjugates of said copies, wherein the receive and transmit parts comprise means for extracting data from the Fourier transform unit for the first bandwidth covered by a received signal, and means for correlating said extracted fast Fourier transform data.