| 140Mb/s16-QAM传输系统中140MHz中频限带滤波系统的优化设计和硬件实现 |
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| 引用本文： | 张照林,孙仁琦.140Mb/s16-QAM传输系统中140MHz中频限带滤波系统的优化设计和硬件实现[J].南京邮电大学学报(自然科学版),1989(1). |
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| 作者姓名： | 张照林 孙仁琦 |
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| 作者单位： | 南京邮电学院无线电工程系，南京邮电学院无线电工程系 |
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| 摘 要： | 本文提出了用于16-QAM 限带系统的新的偶阶阻带等波纹逼近函数的方法,进行了计算机设计,并在中频140MHz 给出了硬件实现.这种方法的优点是;由低通变换到带通比较直观,选用电感元件最少.
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| 关 键 词： | 数字微波接力系统 带通滤波器 带阻滤波器 QAM 系统 |
Optimization Design and Hardware Implementation of 140MHz IF Band-Limited Filting System in 140Mb/s 16-QAM Transmission System |
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| Zhang Zhaoling Sun Renqi.Optimization Design and Hardware Implementation of 140MHz IF Band-Limited Filting System in 140Mb/s 16-QAM Transmission System[J].Journal of Nanjing University of Posts and Telecommunications,1989(1). |
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| Authors: | Zhang Zhaoling Sun Renqi |
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| Institution: | Department of Radio Engineering |
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| Abstract: | This paper puts forward a kind of neweven order equal ripple approaching function method used for 16-QAM band-limlted system and gives its hardware implementation at IF 140MHz. It is very effective to use the odd order equal ripple func- tion method to design band-limited filter,This kind of method is introduced in1].This paper points out that the even order equal ripple function method has advantages of intuitive process of changing from low pass to band pass and the least number of inductors.The whole design has been programmed,and the program is fit for general design of band-limited filter and very convenient to use.At the end,the hardware implementation and its results are given. |
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| Keywords: | Digital microwave relay systems Bandpass filters Band-rejection filters QAM systems |
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