DQPSK调制解调系统的FPGA实现  

FPGA Implementation of DQPSK Modulation and Demodulation System

作　　者：冯雪峰 禹永植[1] Feng Xuefeng;Yu Yongzhi(School of information and communication engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《南京师范大学学报（工程技术版）》2021年第2期34-39,共6页Journal of Nanjing Normal University(Engineering and Technology Edition)

基　　金：航空科学基金项目(201801P6001)。

摘　　要：调制解调是数字通信系统中不可或缺的一环,而FPGA在数字通信系统中的应用也越来越广泛,利用FPGA来设计调制解调系统是一种必然的趋势.研究了四相相对相移键控(different quadrature phase shift keying,DQPSK)调制解调器在FPGA中的实现,通过对调制系统和解调系统中的数控振荡器、快速傅里叶频偏估计、载波同步、位同步等模块的设计,提出了一种抗多普勒频偏及相位模糊的DQPSK调制解调系统设计方案,并在开发环境Vivado中进行了仿真,仿真结果表明该方案能准确的实现对基带信号的调制解调.Modulation and demodulation is an indispensable part of digital communication system,and FPGA has been more and more widely used in digital communication system,so it is an inevitable trend to design modulation and demodulation system with FPGA.This paper mainly studies the relative phase shift keying to four modem implementation in FPGA.Based on designing such modules as the numerical control oscillator,fast Fourier pressure impulses estimation,carrier synchronization,bit synchronization in the modulation and demodulation system,this paper proposes a doppler frequency offset and phase fuzzy DQPSK(different quadrature phase shift keying)modem system design scheme,and in the developmental environment,Vivado are simulated.The simulation results show that the proposed scheme can accurately realize the baseband signal demodulation.

关 键 词：四相相对相移键控 FPGA 载波同步 GARDNER算法 差分编解码 

分 类 号：TN911.72[电子电信—通信与信息系统]