摘要
一些不同的数字调制信号有着相同或相近的功率谱密度，但它们的谱相关函数却有明显区别。平稳的噪声和干扰的谱相关为零。利用谱相关函数的这些性质可以识别出噪声中的调制信号。本文提出了一种用于移动通信信号自动调制识别的谱相关算法，该方法可以识别各种主要无线系统和标准所采用的调制类型。
Different types of digitally modulated signals that have similar, if not identical, power spectral density functions can have highly distinct spectral correlation functions. The spectral correlation of stationary noise and interference is identically zero. These characteristics of spectral correlation can be used to classify modulated signals, even when the signals are buried in noise. In this paper, an algorithm for recognition of modulation types of mobile communication signals, utilizing the spectral-correlation approach, is developed. The procedure covers most modulation types adopted by a variety of wireless systems and standards.
出处
《电讯技术》
北大核心
1999年第2期9-14,17,共7页
Telecommunication Engineering
基金
国防科技预研跨行业重点资助
关键词
移动通信
谱相关
自动调制识别
Mobile Communication, Spectral Correlation, Automatic Modulation Recognition
