Processing of a fractalet radio detection and ranging (RADAR) signal is described. A reference fractalet waveform is received. The fractalet waveform includes self-similar waveforms having lower frequency bands and frequency bands. A reflected fractalet waveform received via one or more antennae is decoded. A waveform profile of chirplet transforms of signals in the lower frequency bands within the reflected fractalet waveform are compared to the reference fractalet waveform. Time spans corresponding to the subset of lower frequency bands are determined. Signals from the higher frequency bands are extracted from the reflected fractalet waveform. Chirplet transforms for the extracted signals from the higher frequency bands are determined for the determined time spans. Spatial frequency components along azimuth direction and elevation directions are calculated for targets based on the chirplet transforms for the extracted signals from the higher frequency bands.

A frequency estimation signal generator component arranged to receive an input frequency signal and to generate therefrom a frequency estimation signal. The frequency estimation signal generator component comprises a counter component arranged to sequentially output a sequence of control signal patterns over a plurality of digital control signals under the control of an oscillating signal derived from the received input frequency signal terns. The frequency estimation signal generator further comprises a continuous waveform generator component arranged to receive the plurality of digital control signals and a weighted analogue signal for each of the received digital control signals, and to output a continuous waveform signal comprising a sum of the weighted analogue signals for which the corresponding digital control signals comprise an asserted logical state. The frequency conversion component is arranged to derive the frequency estimation signal from the continuous waveform signal output by the continuous waveform generator component

Some demonstrative aspects include radar apparatuses, devices, systems and methods. In one example, an apparatus may include a plurality of Transmit (Tx) chains to transmit radar Tx signals, and a plurality of Receive (Rx) chains to process radar Rx signals. For example, the radar Rx signals may be based on the radar Tx 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.

A scanning method and system for measuring microwave vibration and deformation include simultaneously transmitting linear-frequency-modulation continuous waves by using a plurality of transmit antennas and enabling a main lobe of a synthesized beam to be directed towards a specific angle direction; receiving echoes by using a plurality of receive antennas to obtain vibration and deformation displacement values of a single target or multiple targets in an angle direction 1 of a cycle; through the phase shift control on the plurality of transmit antennas, extracting vibration and deformation displacement values of a single target or multiple targets in an angle direction 2 of the cycle based on the foregoing method; according to a measurement requirement, measuring and extracting vibration and deformation displacement values of a single target or multiple targets in another angle direction of the cycle; and obtaining vibration and deformation displacement time sequence values of all scanned points.