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采用FRM的窄过渡带奇型排列结构改进方法

张文旭 赵文童 陈涛 陈亚静

张文旭, 赵文童, 陈涛, 等 . 采用FRM的窄过渡带奇型排列结构改进方法[J]. 北京航空航天大学学报, 2018, 44(5): 951-958. doi: 10.13700/j.bh.1001-5965.2017.0365
引用本文: 张文旭, 赵文童, 陈涛, 等 . 采用FRM的窄过渡带奇型排列结构改进方法[J]. 北京航空航天大学学报, 2018, 44(5): 951-958. doi: 10.13700/j.bh.1001-5965.2017.0365
ZHANG Wenxu, ZHAO Wentong, CHEN Tao, et al. An improved approach for odd-arrangement structure with narrow transition band based on FRM[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(5): 951-958. doi: 10.13700/j.bh.1001-5965.2017.0365(in Chinese)
Citation: ZHANG Wenxu, ZHAO Wentong, CHEN Tao, et al. An improved approach for odd-arrangement structure with narrow transition band based on FRM[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(5): 951-958. doi: 10.13700/j.bh.1001-5965.2017.0365(in Chinese)

采用FRM的窄过渡带奇型排列结构改进方法

doi: 10.13700/j.bh.1001-5965.2017.0365
基金项目: 

国家自然科学基金 61571146

详细信息
    作者简介:

    张文旭 男, 博士, 讲师。主要研究方向:宽带信号检测、处理与识别

    赵文童 男, 硕士研究生。主要研究方向:数字信道化技术

    陈涛 男, 博士, 教授, 博士生导师。主要研究方向:宽带信号检测、处理与识别

    陈亚静 女, 硕士。主要研究方向:数字信道化技术

    通讯作者:

    张文旭, E-mail: zhangwenxu@hrbeu.edu.cn

  • 中图分类号: TN971.+1

An improved approach for odd-arrangement structure with narrow transition band based on FRM

Funds: 

National Natural Science Foundation of China 61571146

More Information
  • 摘要:

    为了解决数字信道化中窄过渡带滤波器组计算复杂度较高的问题,提出了一种采用频率响应屏蔽(FRM)的窄过渡带奇型排列非最大抽取滤波器组高效结构。在设计该结构的原型滤波器时,首先通过对原型滤波器进行插值得到FRM上支路的滤波器,然后将信号延时与插值后的滤波器相减得到位于下支路的互补滤波器,再利用屏蔽滤波器对插值产生的多余镜像进行屏蔽,最终得到所设计的FRM滤波器。对该改进结构进行了MATLAB仿真,仿真结果验证了该改进结构的正确性。与多相滤波器组结构相比,采用该结构可节省约80%的乘法器资源。由于该改进结构中将抽取提前,降低了系统采样率的限制条件,可以直接应用于高速采样系统中。

     

  • 图 1  FRM滤波器的基本框架

    Figure 1.  Basic framework of FRM filter

    图 2  滤波器插值过程(L=4)

    Figure 2.  Process of filter interpolation for L=4

    图 3  采用FRM技术设计低通滤波器[12, 16]

    Figure 3.  Design of low-pass filter based on FRM[12, 16]

    图 4  滤波器组频带划分

    Figure 4.  Band division of filter bank

    图 5  滤波器组低通实现结构

    Figure 5.  Low-pass structure of filter bank

    图 6  滤波器组信道化高效结构

    Figure 6.  Efficient channelization structure of filter bank

    图 7  FRM滤波器的频率响应合成过程

    Figure 7.  Frequency response synthesis process of FRM filter

    图 8  采用FRM的窄过渡带奇型排列高效结构

    Figure 8.  Odd-arrangement efficient structure with narrow transition band based on FRM

    图 9  原型滤波器幅频响应

    Figure 9.  Amplitude-frequency response of prototype filter

    图 10  原型屏蔽滤波器幅频响应

    Figure 10.  Amplitude-frequency response of prototype masking filter

    图 11  FRM滤波器幅频响应

    Figure 11.  Amplitude-frequency response of FRM filter

    图 12  FRM滤波器组幅频响应

    Figure 12.  Amplitude-frequency response of FRM filter bank

    图 13  FRM滤波器组输出频域波形

    Figure 13.  Output frequency domain waveform of FRM filter bank

    表  1  输入信号参数设置

    Table  1.   Parameter setting of input signals

    输入信号 载波频率/MHz 调制频率/MHz 理论输出信道编号
    LFM1 70 -10~+10 3、4
    AM1 140 1 5
    LFM2 205 -15~+15 2
    DSB1 285 0.7 6
    LFM3 339 -19~+19 1
    DSB2 400 0.8 7
    AM2 440 2 0
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-05-31
  • 录用日期:  2017-11-23
  • 网络出版日期:  2018-05-20

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