基于 FPGA 的 QPSK 调制器的设计

摘要

本文主要阐述了数字调制系统的基本原理，针对四相移相键控（QPSK）调制方式进行了分析，并用 FPGA 设计出了一个采用相位选择法的 QPSK 调制器。经过测试验证，用 Synplify Pro 软件综合后得出该调制器的电路原理图，比较并得出了设计 QPSK 的一般方法。%This paper mainly describes the basic principle of the digital modulation system ,analyzes the modu-lation of the four phase shift keying (QPSK) ,and uses FPGA to design a QPSK modulator by the phase selection method .After the test verification ,the paper draws the circuit principle diagram of the modulator by the Synplify Pro software ,compares and obtains a general method for the design of QPSK .