A low-cost and modular receiver for MIMO SDR

This article outlines the development of a low-cost receiver for Software Defined Radio (SDR) to receive a data burst on an intermediate frequency of 113 MHz. This data will have to be sampled and demodulated. Constellations are plotted in real time and Bit Error Rate (BER) is also continuously determined. The original data is received on 2.45 GHz and transformed to an intermediate frequency by the receiver front-end. The received signal is then buffered, filtered, amplified and demodulated. This is all done in hardware. After this, the microcontroller takes over to process the signal, showing the data as a constellation diagram on the display.