Radar apparatus, system, and method
Some demonstrative aspects include radar apparatuses, devices, systems and methods. In one example, an apparatus may include a plurality of Transmit (Tx) antennas to transmit radar Tx signals, a plurality of Receive (Rx) antennas to receive radar Rx signals based on the Tx signals, and a processor to generate radar information based on the radar Rx signals. The apparatus may be implemented, for example, as part of a radar device, for example, as part of a vehicle including the radar device. In other aspects, the apparatus may include any other additional or alternative elements and/or may be implemented as part of any other device.
1 . An apparatus comprising:
an input to receive radar receive (Rx) data, the radar Rx data based on radar signals received via a plurality of Rx antennas of a Multiple-Input-Multiple-Output (MIMO) radar antenna; and
a processor to generate radar information by applying an Iterative Adaptive Approach (IAA) algorithm to the radar Rx data, the IAA algorithm configured for a multi-path scenario, in which the radar signals comprise multipath signals from a plurality of paths between the MIMO antenna and a radar object, wherein the IAA algorithm is configured such that the radar information comprises an Angle of Arrival (AoA) spectrum having, for the radar object, no more than two amplitude peaks, which are above −20 Decibel (dB), corresponding to the multipath signals.
2 . The apparatus of claim 1 , wherein the no more than two amplitude peaks comprise a first amplitude peak corresponding to a direct path between the MIMO antenna and the radar object, and no more than a second amplitude peak corresponding to an indirect path between the MIMO antenna and the radar object.
3 . The apparatus of claim 2 , wherein the indirect path between the MIMO antenna and the radar object comprises a path from the MIMO radar antenna to the radar object via a reflector, and from the radar object to the MIMO radar antenna via the reflector.
4 . The apparatus of claim 1 , wherein the processor is configured to apply the IAA algorithm to the radar Rx data based on a steering matrix comprising a plurality of different-angle steering vectors, wherein a different-angle steering vector of the plurality of different-angle steering vectors comprises a steering vector corresponding to a different-angle Transmit (Tx)-Rx (Tx-Rx) angle combination comprising a combination of a Tx angle and an Rx angle, which is different from the Tx angle.
5 . The apparatus of claim 4 , wherein the steering matrix comprises a plurality of same-angle steering vectors corresponding to a respective plurality of angle values, wherein a same-angle steering vector corresponding to an angle value comprises a steering vector corresponding to a same-angle Tx-Rx combination comprising a combination of a Tx angle equal to the angle value and an Rx angle equal to the angle value.
6 . The apparatus of claim 5 , wherein the plurality of different-angle steering vectors correspond to a plurality of Tx-Rx angle combinations, respectively.
7 . The apparatus of claim 6 , wherein the processor is to select the plurality of Tx-Rx angle combinations from a plurality of possible Tx-Rx combinations, wherein the plurality of possible Tx-Rx combinations is based on the plurality of angle values.
8 . The apparatus of claim 7 , wherein the processor is configured to select the plurality of Tx-Rx angle combinations from the plurality of possible Tx-Rx combinations based on a one-dimensional beamforming algorithm applied to the radar Rx data.
9 . The apparatus of claim 8 , wherein the processor is configured to determine a one-dimensional beamforming AoA spectrum by applying the one-dimensional beamforming algorithm to the radar Rx data, to identify in the one-dimensional beamforming AoA spectrum a plurality of peaks above a predefined threshold, and to select the plurality of Tx-Rx angle combinations based on the plurality of peaks.
10 . The apparatus of claim 9 , wherein the processor is configured to select the plurality of Tx-Rx angle combinations based on the plurality of peaks and one or more points in the one-dimensional beamforming AoA spectrum corresponding to one or more peaks.
11 . The apparatus of claim 9 , wherein the predefined threshold is −20 dB.
12 . The apparatus of claim 5 , wherein the steering matrix comprises a first count, denoted K, of same-angle steering vectors, followed by a second count, denoted Ks, of different-angle steering vectors.
13 . The apparatus of claim 12 , wherein the processor configured to determine an IAA spectrum by applying the IAA algorithm to the radar Rx data based on the steering matrix, and to determine the AoA spectrum to include first K elements of the IAA spectrum.
14 . The apparatus of claim 5 , wherein the plurality of different-angle steering vectors corresponds to all possible Tx-Rx combinations based on the plurality of angle values.
15 . The apparatus of claim 1 comprising the MIMO radar antenna, and a plurality of Physical layer (PHY) chains to generate the radar Rx data based on the radar signals received via the plurality of Rx antennas.
16 . A vehicle comprising:
a system controller configured to control one or more vehicular systems of the vehicle based on radar information; and
a radar device configured to provide the radar information to the system controller, the radar device comprising:
a Multiple-Input-Multiple-Output (MIMO) radar antenna comprising a plurality of Transmit (Tx) antennas to transmit radar Tx signals, and a plurality of Receive (Rx) antennas to receive radar Rx signals; and
a processor to generate the radar information based on radar Rx data, the radar Rx data based on the radar Rx signals, wherein the processor is configured to:
generate processed radar data by applying an Iterative Adaptive Approach (IAA) algorithm to the radar Rx data, the IAA algorithm configured for a multi-path scenario, in which the radar Rx signals comprise multipath signals from a plurality of paths between the MIMO antenna and a radar object, wherein the IAA algorithm is configured such that the processed radar data comprises an Angle of Arrival (AoA) spectrum having, for the radar object, no more than two amplitude peaks, which are above −20 Decibel (dB), corresponding to the multipath signals, wherein the radar information is based on the processed radar data.
17 . The vehicle of claim 16 , wherein the no more than two amplitude peaks comprise a first amplitude peak corresponding to a direct path between the MIMO antenna and the radar object, and no more than a second amplitude peak corresponding to an indirect path between the MIMO antenna and the radar object.
18 . A product comprising one or more tangible computer-readable non-transitory storage media comprising instructions operable to, when executed by at least one processor, enable the at least one processor to:
generate radar information by applying an Iterative Adaptive Approach (IAA) algorithm to radar receive (Rx) data, the radar Rx data based on radar signals received via a plurality of Rx antennas of a Multiple-Input-Multiple-Output (MIMO) radar antenna, the IAA algorithm configured for a multi-path scenario, in which the radar signals comprise multipath signals from a plurality of paths between the MIMO antenna and a radar object, wherein the IAA algorithm is configured such that the radar information comprises an Angle of Arrival (AoA) spectrum having, for the radar object, no more than two amplitude peaks, which are above −20 Decibel (dB), corresponding to the multipath signals; and
provide an output based on the radar information.
19 . The product of claim 18 , wherein the no more than two amplitude peaks comprise a first amplitude peak corresponding to a direct path between the MIMO antenna and the radar object, and no more than a second amplitude peak corresponding to an indirect path between the MIMO antenna and the radar object.
20 . The product of claim 18 , wherein the instructions, when executed, cause the at least one processor to apply the IAA algorithm to the radar Rx data based on a steering matrix comprising a plurality of different-angle steering vectors, wherein a different-angle steering vector of the plurality of different-angle steering vectors comprises a steering vector corresponding to a different-angle Transmit (Tx)-Rx (Tx-Rx) angle combination comprising a combination of a Tx angle and an Rx angle, which is different from the Tx angle.