Field Programmable Gate Array Based Implementation of Digital Down Converter for Magnetic Resonance Imaging

In Magnetic Resonance Imaging (MRI) system, the MRI receiver plays a crucial role for image acquisition. In this paper, implementation results of MRI receiver are shown. A sinc modulated test signal with center frequency of 5MHz is applied as input to the digital MRI receiver. This signal is further decimated with a factor of 20 by using Digital Down-Converter (DDC). The successful implementation of DDC is achieved using the Digital Signal Processing (DSP) techniques and verified using the MATLAB software. The block design of the overall receiver chain is implemented using VIVADO software. On comparing the simulation results the paper concludes that the obtained simulation results are equivalent to the transmitter's input baseband signal.