Correction techniques for the truncation of the source field in acoustic analogies
The truncation of the source field may induce large overpredictions in the acoustic field computed through acoustic analogies. A comparative study of different correction approaches proposed in the literature is carried out, considering three different techniques: correction terms based on a convection assumption, use of model extensions, and windowing techniques. It is shown that convection-based correction terms need to take into account noncompactness effects of the source field in order to yield accurate results. A modified correction term that includes these effects is derived, and its equivalence to the method of model extensions in the case of purely convected flows is highlighted. Moreover, the performance of different windowing techniques is investigated.
This paper discusses some potential approaches to developing next-generation radar technologies via the development of ::: smart hardware subsystems that have the intrinsic capability to compensate for channel warping and propagation ::: distortions. Discussions with regard to typical categories of propagation distortions are provided along with a series of ::: sample scenarios that can provide challenging conditions for radar remote sensing applications. Observations of this set ::: of sample scenarios allows for the exploration of potential approaches to developing state-of-the art digital, RF, and ::: RF/Photonic technologies with intrinsic smart compensation capabilities that will enable the development of highresolution ::: radars that can operate at longer ranges while maintaining compact size and weight requirements.