期刊论文

中文

南华大学学报(自然科学版)

1673-0062

2019

33

4

49-54

10.19431/j.cnki.1673-0062.20190607.002

16A181:湖南省教育厅重点项目 CX2016B443:湖南省研究生科研创新项目 201701077014:教育部卓越工程师教育培养计划项目产学合作协同育人项目

本校为第一机构

通过对软件无线电技术的研究,提出了一种适合中频传输的改进型全数字四相相对相移键控(differential quadrature reference phase shift keying,DQPSK)调制方案,该方案能够输出采样率可变的调制信号.对DQP SK调制的工作过程中变频模块进行了研究,其中插值模块的更改可以实现不同的速率变化.并重点描述了积分梳状滤波器(cascade integrator comb,CIC)及其补偿的办法,能使不同带宽的低速率信号实现上采样到载频输出调制信号,并给出了具体的性能仿真分析.

Based on the research of software radio technology,an improved all-digital DQPSK modulation scheme is proposed,which is suitable for intermediate frequency transmission.It can output modulated signals with variable sampling rate.The frequency conversion module in the working process of DQPSK modulation is studied,and the change of the interpolation module can realize different rate changes.The CIC filter and its compensation method are described in detail,which enables the low-rate signals of different bandwidths to be up-sampled to the carrier-frequency output modula...