Develop a MATLAB algorithm for the resolution optimization of a USRP B210 card for SDRadar applications
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Abstract
This paper analyzes the universal software radio peripherical (USRP) B210 limitations and characteristics to develop applications on Software Defined Radar (SDRadar). The developed algorithm uses a frequency-modulated constant wave (FMCW), which implements a chirp signal, considering that 25 MHz is the maximum bandwidth that the USRP can provide with a maximum resolution of 6 meters. The method improves the resolution through several signals transmitted with different bandwidths, obtaining different resolutions, storing them in a simple matrix, and analyzing them. After simulations, it is determined that the 14 measurements done with bandwidth spacing of 0.5 MHz between every signal is the best way to improve the resolution. Finally, two scenarios for the optimization procedure are described. The first scenario is limited by a measurement error of less than 1 meter, and the second scenario is limited by a measurement error between 1 and 2 meters, getting better effectiveness of the measurement under the first scenario with 69.15% of detected objectives compared with the 30.85% of the effectiveness of the second one. This paper demonstrates that the algorithm is practical in SDRadar applications to detect objectives for topographic applications or SAR systems.
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