摘要
提出了一种新的OFDM信号盲识别算法,由于多载波OFDM信号在时域上具有渐进高斯特性,而单载波信号没有这样的特点。对传统算法进行了改进,提出利用四阶累积量构造识别参数来分类OFDM信号与单载波信号,该参数具有对多径信道不敏感的特点。仿真证明,该算法具有抗多径能力强,识别率高的优点。
A new algorithm of the identification of OFDM （Orthogonal Frequency Division Multiplexing） signals is proposed in this paper. Because OFDM signals are asymptotically Gaussian,the traditional method is improved, recognition parameter formed by forth order cumulant is uesd to discriminate OFDM signals from single - carrier signals. Simulation results show that this method is immune to multipath channel,and have high identification performances.
出处
《现代电子技术》
2007年第11期13-16,共4页
Modern Electronics Technique
基金
国家自然科学基金重大项目(60496316)
关键词
信号调制类型识别
多径信道
OFDM
高阶累积量
identification of signal modulation
multi path channel
OFDM
higher order cumulant
