Abstract
In this paper, we propose the design and implementation mechanism for different digital modulators such as Quadrature Amplitude QAM-32 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-32 .
- 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-32 , DDFS, QDDFS , FPGA.

| DOI: 10.17148/ IMRJR.2024.010204