Design and Implementation of a Digital Quadrature Amplitude Modulator QAM-16 using FPGA

Abstract: In this paper, we propose the design and implementation mechanism for different digital modulators such as Quadrature Amplitude QAM-16 modulators based on the use of Quadrature Direct Digital Frequency Synthesizer (QDDFS) using Cyclone II EP2C20F484C7 FPGA from ALTERA placed on education and development board DE-1 with the following parameters:

- Clock frequency : FCLK=50MHz .
- Modulation type of signal is : QAM-16 .
- Frequency range : (0.011 Hz…10 MHz) .
- Frequency Resolution : (0.011 Hz) .
- Signal amplitude (5V) .
- Data frequency : 1KHz .
- Digital designs allow the slides to modify and design development for results and better through reprogramming, depending on the user's desire.

Keywords: Digital Modulator, QAM, QAM-16, DDFS, QDDFS, FPGA.