一种低信噪比下有效的数字信号调制识别方法

摘要

提出一种利用信号包络特征同分形维特征相结合的调制识别方法.利用奇异值分解降噪原理可以有效地对信号进行噪声抑制.仿真结果表明,在O dB信噪比环境下,方法的正确识别率能够达到90％以上.%In this paper, a modulation identification method with signal envelope characteristic and fractal dimension characteristic is presented. Using singular value decomposition denoising theory, noise effectively can be reduced. Simulation results show that this method of modulation recognition accuracy above 90% in the case of SNR=0 dB.