Design and Implementation of a Digital Amplitude Shift Keying (ASK), Frequency Shift Keying (FSK), Binary Phase Shift Keying(BPSK) and Quadrature Phase Shift Keying (QPSK) Modulators using FPGA

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

.=50MHzCLK: FClock frequency- - Modulation type of signal is :ASK ,FSK , BPSK , QPSK .
- 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 , ASK , FSK , BPSK , QPSK , DDFS , QDDFS ,FPGA.