船舶抗信号干扰的低通数字滤波器设计
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摘要
船舶滤波器在进行信号滤波处理过程中,很容易受到信号干扰。对此设计DSP船舶抗信号干扰的低通数字滤波器。以TI公司生产的DSP低通芯片构造TMS320信号处理器作为滤波器核心硬件,并对其外围结构和处理器JTAG接口进行优化设计;采用定点数值运算,最大程度保持数字滤波器数值精度,将滤波器浮点数转化为定数,实现抗干扰低通数字滤波器设计。实验数据表明,相比较传统的船舶数字滤波器,设计的DSP船舶抗信号干扰的低通数字滤波器具有更强的抗干扰性。
In the process of signal filtering, the ship filter is easily disturbed by signal. A low-pass digital filter for DSP ship anti-signal interference is designed. The DSP low-pass chip produced by TI company was used to construct TMS320 signal processor as the core hardware of filter, and its peripheral structure and processor JTAG interface were optimized. The design of anti-interference low-pass digital filter is realized by using fixed-point numerical operation to maintain the numerical accuracy of digital filter to the maximum extent, and converting the floating point number of filter into a fixed number.The experimental data show that compared with the traditional ship digital filter, the designed DSP ship low pass digital filter has stronger anti-interference performance.
In the process of signal filtering, the ship filter is easily disturbed by signal. A low-pass digital filter for DSP ship anti-signal interference is designed. The DSP low-pass chip produced by TI company was used to construct TMS320 signal processor as the core hardware of filter, and its peripheral structure and processor JTAG interface were optimized. The design of anti-interference low-pass digital filter is realized by using fixed-point numerical operation to maintain the numerical accuracy of digital filter to the maximum extent, and converting the floating point number of filter into a fixed number.The experimental data show that compared with the traditional ship digital filter, the designed DSP ship low pass digital filter has stronger anti-interference performance.
引文
[1]何伶俐,王宇峰,祝元仲,等.心电信号工频干扰数字滤波方法比较研究[J].电子设计工程,2016,24(13):70-72.
[2]刘国良.基于嵌入式的舰船抗干扰过滤软件设计[J].舰船科学技术,2017,8(18):142-144.
[3]汪其锐,王桂华,王永军.巴特沃斯数字低通滤波器设计及应用[J].山东工业技术,2016,5(24):251-251.
[4]严恭敏,苏幸君,翁浚,等.基于惯导和无时延滤波器的舰船升沉测量[J].导航定位学报,2016,4(2):91-93.
[2]刘国良.基于嵌入式的舰船抗干扰过滤软件设计[J].舰船科学技术,2017,8(18):142-144.
[3]汪其锐,王桂华,王永军.巴特沃斯数字低通滤波器设计及应用[J].山东工业技术,2016,5(24):251-251.
[4]严恭敏,苏幸君,翁浚,等.基于惯导和无时延滤波器的舰船升沉测量[J].导航定位学报,2016,4(2):91-93.