Cognitive techniques for a wideband phased array radar

Compressed spectrum Sensing in Cognitive Radar systems

“…The cognitive radar uses a spectrum sensing module that scans and senses the frequency channels to evaluate the spectrum occupancy of the communication systems. As described in [1]- [2], the cognitive radar transmits a wideband pulse, suitably modified by notching the frequencies occupied by the other systems. As stated before, spectrum sensing serves to minimize the interference between the radar and the other radiating elements.…”

“…Spectrum Sensing has the goal to recognize the frequencies used by other systems using the same spectrum in real time, while Spectrum Sharing has the goal to limit interference from the radar to other services and vice versa. In [1]- [2] we analyzed the problem of spectrum allocation and sharing, designing a cognitive radar that provides good radar performance in the presence of interference from other users and low impact on the performance of the other users by the presence of the radar. From the concluding remarks of our previous works [1]- [2], it is apparent that the presence of an observation block for spectrum sensing and analysis is paramount and its design is decisive to exploit the full potentiality of the system.…”

Proposed ontology for cognitive radar systems

“…Goodman [44] describes a framework for implementing closed-loop waveform design. A cognitive processor is described [45] capable of learning the spectral content of the environment for use in creating an appropriate notched waveform for transmission, while the same authors consider the impact of the notched waveforms to beamforming in wideband phased array radars [46]. Aubry et al employ information from a radio environmental map to provide constraints for waveform design in crowded environments [47].…”