一种超宽带可变符号率FQPSK调制方法  

An Ultra-Wideband Variable Symbol Rate FQPSK Modulation Method

作　　者：李梦婷 孙秀斌[1] 张红萍 LI Mengting;SUN Xiubin;ZHANG Hongping(Chengdu University of Information Technology,Chengdu Sichuan 610225,China;Military Representative Office of Luzhuang Stationed in Guangyuan Area,Guangyuan Sichuan 628000,China)

机构地区：[1]成都信息工程大学,四川成都610225 [2]陆装驻广元地区军事代表室,四川广元628000

出　　处：《通信技术》2023年第6期792-798,共7页Communications Technology

摘　　要：针对传统费赫尔正交移相键控(Feher’s Quadrature Phase Shift Keying,FQPSK)调制算法在硬件实现时,符号速率受系统时钟频率限制,难以实现大容量传输的问题,借鉴直接数字合成(Direct Digital Synthesis,DDS)原理,提出了一种超宽带可变符号率FQPSK调制方法,通过并行查找表实现超宽带FQPSK波形映射,通过频率控制字,实现可变符号率调制,突破了系统时钟频率对符号率的限制。在Vivado环境中的Verilog HDL程序仿真,验证了所提方法的有效性。When the conventional FQPSK(Feher’s Quadrature Phase Shift Keying)modulation algorithm is implemented in hardware,the symbol rate is limited by the system clock frequency and it is difficult to achieve large-capacity transmission.To address these problems,an ultra-wideband variable symbol rate FQPSK modulation method is proposed with reference to the DDS(Direct Digital Synthesis)principle.This method implements ultra-wideband FQPSK waveform mapping through parallel lookup tables,and achieves variable symbol rate modulation by frequency-controlled words,which breaks through the limitation of system clock frequency on symbol rate.Verilog HDL program simulation in Vivado environment verifies the effectiveness of the proposed method.

关 键 词：超宽带 可变符号率 FQPSK 并行查找表 DDS 

分 类 号：TN911[电子电信—通信与信息系统]