摘要： 提出一种基于决策理论的模拟数字混合调制信号自动识别算法，采用基于I/Q正交双路的信号处理架构，利用扩展收敛域的CORDIC算法提取信号的瞬时幅度、瞬时相位和瞬时频率，结合软件无线电中具体的工程实现方法，修改部分识别特征参数，介绍基于判决树的识别流程。仿真结果表明，在信噪比不小于6 dB时，采用该算法的平均正确识别率在94%以上。
关键词:
调制识别,
软件无线电,
特征参数,
决策理论,
坐标旋转数字计算机算法
Abstract: An automatic modulation recognition algorithm based on decision-theoretic approach for analog and digital communication signal is presented. The signal processing architecture based on in phase the quadrature channels is introduced. The instantaneous amplitude, instantaneous phase and instantaneous frequency are calculated by Coordinated Rotation Digital Computer(CORDIC) algorithm with an expanded convergence range. It is combined with software defined radio technology and some recognition parameters are modified. The recognition flowchat based on decision tree is put forward. Simulation indicates when the Signal-Noise Ratio(SNR) is no less than 6 dB, the average correct recognition ratio is above 94%.
Key words:
modulation recognition,
software defined radio,
characteristic parameter,
decision theory,
Coordinated Rotation Digital Computer (CORDIC) algorithm
中图分类号:
何晓华, 谢建精, 李式巨, 郭洪志. 基于决策理论的模拟数字混合信号调制识别[J]. 计算机工程, 2010, 36(15): 286-287,290.
HE Xiao-Hua, XIE Jian-Jing, LI Shi-Ju, GUO Hong-Zhi. Modulation Recognition for Analog and Digital Mixed Signal Based on Decision Theory[J]. Computer Engineering, 2010, 36(15): 286-287,290.