| 正交调制实现窄带带通数字滤波器 |
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| 引用本文： | 訾学博,张大千.正交调制实现窄带带通数字滤波器[J].沈阳航空工业学院学报,2006,23(5):81-83. |
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| 作者姓名： | 訾学博 张大千 |
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| 作者单位： | 沈阳航空工业学院,辽宁省,沈阳,110034 |
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| 摘 要： | 为了提高滤波器性能并简化设计,采用正交调制等效结构实现了带通滤波,使一组中心频率不同,而其余指标都相同的窄带带通数字滤波器设计简化为一个窄带低通数字滤波器设计.对窄带低通数字滤波器设计,又采用了多抽样率多级实现技术,提高了运算效率,节省了存储空间.该设计已在TMS320C3X系列DSP芯片上调试通过,并运用于铁路电气化区段机车信号译码.
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| 关 键 词： | 数字滤波器 窄带滤波 抽取 内插 正交调制 |
| 文章编号： | 1007-1385(2006)05-0081-03 |
| 修稿时间： | 2006年8月25日 |
Quadrature modulation implementing narrowband bandpass filtering |
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| ZI Xue-bo,ZHANG Da-qian.Quadrature modulation implementing narrowband bandpass filtering[J].Journal of Shenyang Institute of Aeronautical Engineering,2006,23(5):81-83. |
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| Authors: | ZI Xue-bo ZHANG Da-qian |
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| Abstract: | In order to improve the property of filter and simplify designing processes,When designing a group of narrowband bandpass filters with the same specifications except With different center frequencies,a quadrature modulation structure for bandpass filtering using the prototype with lowpass filter is adopted.Also,the multirate and multistage techniques are employed to design the lowpass narrowband filter in order to obtain high performance as well as high efficiency and saving storage space.This designing has implemented on TMS320c3x DSP and used cab signalling decoding of electric railway sections. |
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| Keywords: | digital filter narrowband filtering decimation interpolation quadrature modulation |
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