摘要
随着信息化的进展,频率资源越来越紧缺,本文介绍了一种能够很大程度地提高频谱利用率的调制方法—超窄带调制技术,并分析了其中的关键技术。最后着重讨论了超窄带调制与FM结合的双模式传输技术。
With the development of the information,the frequency resources become more and more shortage.This text introduces a kind of modulation method called Ultra Narrow Band Modulation,which can greatly improve the spectral efficiency.Then it analysis the key technologies.At last it discusses the dual-mode transmission technology of the Ultra Narrow Band Modulation and the FM combination.
出处
《中国传媒大学学报（自然科学版）》
2010年第2期71-75,70,共6页
Journal of Communication University of China：Science and Technology
关键词
超窄带调制
突变相位调制
零群时延滤波器
双模式传输
UNB（Ultra Narrow Band Modulation）
abrupt phase change digital modulation
zero group delay filter
dual-mode transmission
