OFDM radar sensor including multiple transmission channels and progressive computation of time signals

An OFDM radar sensor, comprising:

• multiple transmission channels;
• at least one reception channel;
• a control and evaluation device configured for an operating mode in which the multiple transmission channels transmit respective signals, the respective signal of each transmission channel including a sequence of OFDM symbols, and the respective signals of the multiple transmission channels being transmitted simultaneously, the OFDM symbols transmitted on each transmission channel of the multiple transmission channels each including OFDM subcarriers that are orthogonal to OFDM subcarriers of the OFDM symbols that are simultaneously transmitted on the other of the multiple transmission channels, when carrying out a transformation of the OFDM symbols into the time range;
• wherein, for a reception signal that is received from the at least one reception channel, a spectral separation of signal components of the reception signal takes place, a division of OFDM subcarriers over signal components taking place corresponding to their division over the transmission channels in the OFDM symbols that are simultaneously transmitted on the transmission channels, and an evaluation of the signal components taking place,
• wherein, the OFDM radar sensor includes multiple respective buffer memories for each respective first transmission channel of at least first transmission channels of the multiple transmission channels, the multiple respective buffer memories being configured to store portions of a signal form of the respective signal to be transmitted of the respective first transmission channel,
• wherein for the operating mode, at least for the respective first transmission channels, the signal form of the respective signal to be transmitted, which includes the sequence of OFDM symbols, is progressively computed in portions for each of the respective first transmission channels, the multiple buffer memories being used in alternation for storing a computed portion of the signal form and for reading out a previously computed and stored preceding portion of the signal form, which is converted from digital to analog and transmitted, wherein a particular portion of the signal form is computed and stored in one of the buffer memories while the preceding portion of the signal form is read out from another of the buffer memories and converted from digital to analog, and transmitted on the respective first transmission channel, and
• wherein signal forms of the OFDM symbols of the transmission channels to be simultaneously transmitted are computed in parallel for the transmission channels, with the aid of an inverse fast Fourier transformation (IFFT) for each of the transmission channels.