摘要
针对常用的多进制数字调制信号,设计了一通用的数字调制识别方案:先用三个时频域特征参数进行调制的大类识别,再利用各自算法估计信号调制阶数,修正了MFSK信号功率谱谱峰个数的估计算法,并提出了MASK/MQAM基于时域的调制阶数识别算法。仿真结果表明,在信噪比大于6dB时,该识别结构和识别算法对MFSK、MPSK、MASK调制信号的正确识别率不低于92%,MQAM识别算法则要求较高的信噪比。
A general digital modulation recognition method is proposed for common M-ary digital modulations. A coarse recognition is executed, then different algorithms are used to estimate the order of modulation. Estimation on the number of spectrum peaks is modified and a novel recognition algorithm for modulation order of MASK and MQAM is presented. Simulations results show that the recognition rate for this recognition structure and algorithm can reach 92% for MFSK, MPSK and MASK when the SNR is above 6 dB, and for MQAM, a higher SNR is required.
出处
《通信技术》
2008年第10期41-43,共3页
Communications Technology
关键词
调制识别
瞬时特征
谱特征
判决器
modulation recognition
instantaneous feature
spectrum feature
decision tree
