Aplicación de algoritmo de optimización de resolución para la detección de objetivos en movimiento con tecnología SDRADAR.

Abstract

An algorithm was developed in Matlab software that allows the optimization of the resolution, when an objective is in motion, with software-defined radar technology (SDRadar) analyzing in this way the limitations corresponding to the resolution and characteristics of the NI USRP card 2932. The type of FMCW frequency modulated continuous wave radar was chosen, because it sends a signal without interruptions and it can modify its frequency or phase instantaneously, which allows to analyze the Doppler effect, present in the moving objects. The methodology for optimizing the range measurement is based on two corrections, the first with the use of the distance referred to the Doppler frequency with which the target is moving, the second, where it is assumed that the object may have been displaced a distance with respect to the speed considering the use of an initial bandwidth of 25 MHz, from a variation of 0.5 MHz, with the use of 14 measurements, parameters verified in previous investigations. Finally, the correction of the resolution is reduced to an error lower than 2 m in the 99% of the cases, result proved with statistical proofs; this optimization is proposed both for objectives approaching, as for objectives moving away from the source. From the results obtained it is recommended to apply the algorithm for the detection of objectives, military applications, topographic applications, meteorological applications, among others.