| 一种采样率可调的中频DQPSK调制方法设计 |
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| 引用本文： | 蔡敏,王彦,陈智.一种采样率可调的中频DQPSK调制方法设计[J].南华大学学报(自然科学版),2019,33(4):49-54. |
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| 作者姓名： | 蔡敏 王彦 陈智 |
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| 作者单位： | 南华大学 电气工程学院,湖南 衡阳 421001,南华大学 电气工程学院,湖南 衡阳 421001,南华大学 电气工程学院,湖南 衡阳 421001 |
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| 基金项目： | 湖南省教育厅重点项目(16A181);湖南省研究生科研创新项目(CX2016B443);教育部产学合作协同育人创新创业联合基金项目(201701077014) |
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| 摘 要： | 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DQPSK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。
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| 关 键 词： | 中频 四相相对相移键控 上采样 软件无线电 |
| 收稿时间： | 2019/2/27 0:00:00 |
Design of a Medium Frequency DQPSK Modulation Method with Adjustable Sampling Rate |
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| CAI Min,WANG Yan and CHEN Zhi.Design of a Medium Frequency DQPSK Modulation Method with Adjustable Sampling Rate[J].Journal of Nanhua University:Science and Technology,2019,33(4):49-54. |
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| Authors: | CAI Min WANG Yan and CHEN Zhi |
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| Institution: | School of Electrical Engineering,University of South China,Hengyang,Hunan 421001,China,School of Electrical Engineering,University of South China,Hengyang,Hunan 421001,China and School of Electrical Engineering,University of South China,Hengyang,Hunan 421001,China |
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| Abstract: | 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 modulated signals,and the specific performance simulation analysis is given. |
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| Keywords: | intermediate frequency differential quadrature reference phase shift keying up sample software defined radio |
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