摘要
在信息化高速发展、普及的今天,人们对无线通信业务的需求不断增长,随着用户数量的急剧增加,频谱资源日益紧张,因此研究具有高频带利用率的通信技术具有重要意义。本文讨论了一种新的高频带利用率调制技术VWDK,简要地介绍VWDK技术的来由,以及信号的时频域特征,详细地讨论提高频带利用率的去线谱技术并设计发送端系统,着重从功率密度谱、误码特性以及频带利用率这几个角度对系统的性能进行分析,并得出结论。
With fast growth and wide spreading of information technology, the demand of radio communication service is con- stantly increasing. Meanwhile, the spectrum resources are exhausted for the time being with sharply increasing number of users. Therefore, the study of communication technology with high band efficiency is greatly significant. In this paper, a new modulation method termed VWDK with high band efficiency is researched. Its development and time- frequency domain features are introduced briefly, a method of removal of line spectrum to increase bandwidth efficiency is elaborated and sending terminal system is designed. The system performance from PSD, BER and bandwidth efficiency is intensively analyzed, the conclusion is drawn finally.
出处
《自动化技术与应用》
2011年第9期33-37,91,共6页
Techniques of Automation and Applications
关键词
甚小波形差键控
去线谱
高频带利用率
同步精度
very-minimum waveform difference keying
removal of line spectrum
high band efficiency
synchronous precision
