Diseño e implementación de un sistema radar utilizando sistema SDR a través de tecnología USRP para aplicaciones topográficas.

Abstract

In the current research, it was designed and implemented a radar system through a Software Defined Radio System (SDR) via Universal Software Radio Technology Peripheral (USRP) for surveying applications. The radar which was implemented allows estimating the distance between a transmitter and a receiver. From the analytical method, the system was considered by a block diagram to interlink all the possible elements of the system for working together. The system has a transmission and a reception part which are structured in a similar way. The transmitter and receiver are composed by a USRP, the same that deal with all the radio frequency functions. The system has two computers for the transmitter and for receiving which must include Windows 7 operating system and the Matlab software to perform the necessary configuration, and with this, the cards may carry out their function. The cards are connected to the computers through a USB 3.0 interface, so the configuration is sent to the USRP. It was proposed to develop a system with antennas, but the antennas did not have the necessary benefits because the required power was not obtained to reach a greater distance of 1m. To solve the problem the antennas were replaced with different lengths of coaxial cable. With the help of USRP cards, a radar system was implemented with a resolution of 6m that was tested at different distances reducing the amount of hardware that a traditional radar system has. To apply the use of antennas in the system, it is recommended to include an amplification and antennas stage in good conditions, the same which will provide the power required to radiate the signal at different points and then, process the information and plot the topographic profiles.