Implementation and Reconfiguration of Basic Digital Modulation and Demodulation Techniques on FPGA

摘要

In modern communication systems the Autonomous modulation and demodulation technique is done using proper signal detection schemes and prominent receiver structure. The implementation of BPSK, FSK, ASK modulation and demodulation techniques are created in Simulink which is converted into Xilinx core and this further undergoes changes using system generator module. The modulated signals obtained from these simulations are compared with the obtained signals after implementation. The FPGA was programmed with the help of ARM processor to compile the bit files to select the best modulation that has best channel support. The interface is done between the controller (STM32) and FPGA (xc3s500e-256) using JTAG. The XSVF format and synopsis programmed files are stored in the SD-card of the microcontroller. The HyperTerminal displays the output corresponding to the selected modulation. The optimum modulation is selected based on available bandwidth, bit-error-rate and signal to noise ratio. Hence, Among available tools for FPGA design, System Generator is a system-level modeling tool that provides better quality of service, system complexity, power efficiency, bandwidth efficiency and cost effectiveness, more secure, reliable and efficient compared to the analog communication.