文档介绍：
基于理想带限信号的超窄带通信理论研究
徐争光,张颖*
(华中科技大学电子与信息工程系,武汉 430074)
5
10
15
20
25
30
35
40
摘要:提高通信信号的频谱利用率是通信理论研究的一个重要课题,传统方式都是采用多进
制调制来提高每波特码元包含的信息量,而超窄带通信则是通过减小信号带宽来达到这一目
的。与现有的超窄带通信理论立足于设计频谱能量集中的调制波形不同,本文中研究的超窄
带通信理论通过对传统基带信号进行理想低通滤波,产生理想带限的超窄带信号,再基于线
性方程组求解的方法对信号进行解调,从而实现超窄带通信。该方法允许对超窄带信号进行
频分复用,从而提高频谱效率,具有重要的理论价值。
关键词:通信与信息系统;超窄带通信;理想带限信号;方程组求解
中图分类号:TN911
Ultra-narrow-munication theoretical research
based on the ideal band-limited signal
XU Zhengguang, ZHANG Ying
(Huazhong University of Science and Technology, Department of Electronics and Information
Engineering, WuHan 430074)
Abstract: To improve munication signal spectrum efficiency is an important topic of
research munication theory. Traditional methods are based on the M-ary modulation to
increase the amount of information contained in each symbol, while ultra-narrow-band
communication is achieved by reducing the signal bandwidth. Different from the existing
munication theory based on the design of the modulation waveform, a new
munication theory is proposed in this paper, which makes the traditional
baseband signal pass through the ideal low-pass filter, and creates an ideal band-limited
narrowband signal. And then the linear equations are solved to demodulate the signal, so the
ultra-narrow-munication is achieved. This method allows ultra-narrow-band signal
frequency division multiplexing, th