摘要
针对卫星通信这一应用场合,提出了一种数字调制信号自动识别算法。该算法利用调制信号的高阶累积量,并结合星座图特征,对信号进行分类。它对信号的幅度、相位偏差具有不变性,同时可抑制加性高斯噪声;与其它识别算法比较,它具有稳健、应用广泛的特性。通过计算机仿真表明,在给定的数据长度和中等信噪比条件下,可得到很高的识别率(>95%)。
An automatic recognition algorithm of digital modulation signals in satellite communication is presented, which connects high order eumulants with constellation characters. It is invariant with respect to diHerence of amplitude and phase, and it can suppresses white additive Gaussian noise. Compared with the ex- isting algorithms, it is robust and widely usable. Computer simulations show that application of this algorithm in a medium signal-to-noise ratio with a specified sample size results in the high probability of correct identification（〉95 %）.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2009年第6期1303-1306,共4页
Systems Engineering and Electronics
关键词
卫星通信
调制识别
高阶累积量
星座图
satellite communication
recognition of modulation signal high order cumulant
constellation
