SUPER-RESOLUTION BASED ON FREQUENCY DOMAIN INTERFEROMETRIC PORCESSING OF SPARSE MULTI-SENSOR MEASUREMENTS

摘要

A system for obtaining frequency domain interferometric super-resolution of a target scatterer (10), having a first (12) and a second (14) coherent transceivers, a mutual coherent sub-system and an estimation system. The first and second coherent transceivers are operative to produce a plurality o first and second sampling signals separated from each other by a predetermined frequency difference within the first and second sub-band, respectively. The mutual coherent sub-system (16) is coupled to the first and second coherent transceivers to receive phase and amplitude of the first and second sampling signals, so as to evaluate an ambiguous range estimate from a pair of the first and second sampling signals and an unambiguous range estimate from a pair of the first and/or second sampling signals. The estimation system (18) follows the mutual coherent sub-system to reconcile the ambiguous and unambiguous range estimates so as to obtain a target signature with a uper-resolution defined by a frequency offset between the first and second sub-bands.