基于FPGA的DQPSK调制及载波同步的研究与实现

Research and Implementation of DQPSK Modulation and Carrier Synchronization Based on FPGA

摘要: 正交相移键控是一种目前得到较为广泛应用的数字调制方式，它在相移键控的基础上进行了一些改进，与其他调制方式相比，它的频带利用率高、抗干扰能力强、电路实现简单，因此在卫星通信、微波通信和电视信号上行通信中得到广泛的应用。载波同步与解调是通信系统中的关键技术之一，而FPGA在数字通信系统中的应用也越来越广泛。本文介绍了DQPSK调制、载波同步解调设计方案，并在Vivado中进行仿真。

Abstract: Quadrature phase-shift keying is a digital modulation method widely used at present. It has made some improvements on the basis of phase-shift keying. Compared with other modulation modes, it has high-frequency band utilization rate, strong interference ability and simple circuit implemen-tation, so it is widely used in satellite communication, microwave communication and TV signal up-link communication. Carrier synchronization and demodulation is one of the key technologies in the communication system, and the application of FPGA in the digital communication system is also be-coming more widespread. This paper introduces the design scheme of DQPSK modulation and car-rier synchronous demodulation, and simulates it in Vivado.