Diseño experimental de sistema de monitoreo meteorológico satelital a través de sistema SDR – USRP.

Abstract

The objective of the present titling work, to design a prototype for a digital image transmission system, using Software Defined Radio (SDR) technology, specifically the Universal Peripheral Software Defined Radio (USRP) device. Images were acquired using a Raspberry Pi through the Secure Order Interpreter (SSH) protocol, captured images are transferred to the computer using the Secure Copy Protocol (SCP). The computer that received the images acted as transmitter, then the image data were digitized, for this, it was important to use MATLAB software; In addition, this information is stored in a text file. The transmission process was performed using the GNU Radio application for the design of the communication system with Gaussian Minimum Displacement Modulation (GMSK); For which the generated text file was imported and then this data was transmitted with the USRP device through a coaxial cable, which data are received in another USRP device, through a coaxial cable this data, which data are received in another USRP device, which is connected to a new computer that, acting as receiver, the information is processed again in GNU radio; From there, through the demodulator and stored in a text file. Finally, you must import the data from the text file, using MATLAB where this information is decoded resulting in the display of the image that was captured in the Raspberry PI after the transmission process; Therefore, it was concluded that it is possible to transmit images using USRP devices given the presentations provided by the SDR technology. It is recommended to improve synchronization to make the process more agile.