| 基于高阶累积量的MPSK识别方法 |
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| 引用本文： | 王甲峰,岳旸,姚军.基于高阶累积量的MPSK识别方法[J].通信技术,2010,43(9):4-6. |
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| 作者姓名： | 王甲峰 岳旸 姚军 |
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| 作者单位： | 中国工程物理研究院电子工程研究所,四川,绵阳,612900 |
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| 摘 要： | 提出一种不需要载波同步的调制识别方法,能够实现二进相移键控（BPSK）、正交相移键控（QPSK）和八进相移键控（8PSK）的识别。其方法是：首先对带有残余载波的基带信号进行定时抽样,计算抽样点的点积及叉积,并将点、叉积复合成一个复基带调相信号,其特点是调制阶数与原信号相同,而残余载波转换为固定相位;然后,利用这个复基带信号的四阶累积量构造分类向量进行分类。首先介绍四阶累积量的基本概念;然后给出相移键控（PSK）信号的表达形式,点叉积计算方法及其组合而成的复基带信号的形式;其次介绍识别算法;最后进行仿真分析,并考察了符号长度、定时误差及成形因子对分类性能的影响。
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| 关 键 词： | 高阶累积量 调制识别 点积 差积 |
A MPSK Recognition Method Based on High Order Cumulants |
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| WANG Jia-feng,YUE Yang,YAO Jun.A MPSK Recognition Method Based on High Order Cumulants[J].Communications Technology,2010,43(9):4-6. |
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| Authors: | WANG Jia-feng YUE Yang YAO Jun |
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| Institution: | WANG Jia-feng,YUE Yang,YAO Jun (Institute of Electronic Engineering,China Academic of Engineering Physics,Mianyang Sichuan 621900,China) |
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| Abstract: | A carrier synchronization-free recognition method of MPSK is proposed,which could realize the recognition of BPSK,QPSK and 8PSK.First,the timing and sampling of the baseband signal with remained carrier is done the dot product and cross product of the samples calculated,and combined into a complex baseband phase-modulated signal with the same modulation order as the original signal,and the remained carrier transformed to a fixed phase constant;then the 4th order cumulants of the baseband signal is calculate... |
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| Keywords: | high-order cumulant modulation recognition dot product cross product |
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