摘要
本文的研究目的是为了实现调制基带数字信号的滤波成型,课题内容属于
高速调制解调器。
由于高速调制解调器的码元速率很高,我们不能用普通的滤波器对基带信
号进行处理,所以,我们将并行处理技术引进数字滤波器,并且用查表的方法
来实现这种滤波器。
本文的主要内容和作者所做的工作主要包括以下几个方面:
1.介绍了高速调制解调器在国内外的发展状况。
2.简述了高速调制器的工作原理和关键技术。
3.讨论了基带数字信号处理的基本原理,并提出了一种新型的并行查表数
字滤波器。
4.对关键技术进行了仿真,给出了电路实现形式。
Our study is to solve key techno1ogy of baseband digital signal processing for
high-speed modulator and introduce a new digital Nyquist filteL
Because the date-rate of the modem is high, we can't use normal filter to
process baseband signal. We introduce a new digital Nyquist filter based on parallel
date-table.
This paper presents the author's research on the system, which mainly include
the content as follows:
l. The development status on high-speed modem is introduced.
2. The basic theory of high-speed modulator is analyzed, while some key
technologies of the high-speed modulator is dicussed.
3. The basic theory of baseband digital signal processing is discussed and a
kind of new digital filter based on paral1e1 date-table is studied.
4. The key technology is emulated by CAD and the circuit is showed.
引文
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