Tomographic Mathematical Ideas Applied to Radar Detection

摘要

By integrating the echoed pulses after detection, a Chirp diversity radarincorporating tomographic methods possesses non of the symptoms associated with conventional pulse Doppler techniques. The point spreading is a thumbtack-like function. Thus, range-Doppler coverage is unlimited since there are no ambiguity pop-ups to restrict this coverage. In addition, it appears that the mainlobe width depends exclusively on bandwidth. In contrast, the classic thumbtack ambiguity function is affected both by bandwidth and, inversely, by the integration time. More important than the preceding discovery is the property that ambiguity function is not constrained by radar uncertainty principles. Hence, the sands of the beach is not a suitable analogy to describe this ambiguity function. It is concluded that this superthumbtack characteristic offers superior resolution for an accurate interpretation of radar backscatter with respect to detection, parameter estimates, and imaging.