摘要
提出一种基于四阶累积量特征值实现OFDM信号和单载波信号的识别算法,该特征值可有效抑制多径和高斯信道影响.仿真结果表明该算法在低信噪比时,可以达到比较高的信号正确识别率(85%以上),且当信噪比大于2dB,正确识别率可以达95%以上,接近100%.并且该算法计算量小,实现简单.
The use of signal high order cycle eumulant as recognition characteristic features to achieve OFDM signal and single carrier signal recognition algorithms was studied. According to the multipath channel, a kind of recognition algorithms was proposed. It used characteristic features based on fourth-order cumulants as recognition parameters, which could inhibit the multipath effect. The simulation results showed that the algorithm could achieve high signal correct recognition rate （more than 85% ） in low SNR, and when the signal-to-noise ratio was greater than 2 dB, correct recognition rate could achieve above 95% , close to 100%. At the same time, this algorithm needed small amount of calculation and its implementation was simple.
出处
《河南教育学院学报（自然科学版）》
2012年第3期22-26,共5页
Journal of Henan Institute of Education(Natural Science Edition)
基金
国家自然科学基金面上项目(61172086/F010202)
中国博士后面上基金项目(2012M511587)
2010年河南省博士后基金资助项目(OFDM
MIMO信号的关键参数盲估计技术研究)
关键词
累积量
多径信道
信号识别
OFDM
单载波信号
cumulant
multipath channel
signal recognition
OFDM
single carrier signal
