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| 一种MSK信号的数字化解调新算法 | |
| 引用本文： | 胡敏,肖大光. 一种MSK信号的数字化解调新算法[J]. 计算机仿真, 2007, 24(10): 123-125 |
| 作者姓名： | 胡敏 肖大光 |
| 作者单位： | 中南大学信息科学与工程学院,湖南,长沙,410075;中南大学信息科学与工程学院,湖南,长沙,410075 |
| 摘 要： | MSK信号是一种性能优越的数字调制方式,在数字通信中得到了广泛的应用.根据MSK信号的特征,提出了一种基于DFT的MSK信号数字化解调算法.该算法是通过对MSK信号每个码元周期内的采样值分别进行两次DFT运算,计算出对应于1码和0码载波频率的幅值信息,根据幅值大小来判决,从而恢复数字信号.并对存在高斯噪声背景下,该解调算法的误码性能进行了分析.仿真结果表明了该算法计算量小、抗干扰性能好.且与传统的MSK解调算法相比,该算法对位同步不敏感. |
| 关 键 词： | 最小频移键控 数字化解调 离散傅立叶变换 误码率 |
| 文章编号： | 1006-9348（2007）10-0123-03 |
| 修稿时间： | 2006-09-17 |
A New Digital Demodulation Algorithm for MSK Signal |
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| HU Min,XIAO Da-guang. A New Digital Demodulation Algorithm for MSK Signal[J]. Computer Simulation, 2007, 24(10): 123-125 | |
| Authors: | HU Min XIAO Da-guang |
| Abstract: | MSK signal is an ascendant digital modulation.It is applied widely in the digital communication.According to the characteristic of MSK signal,a digital demodulation algorithm for MSK signal based on the DFT is put forward in this paper.The main idea is to do twice DFT operation with the samples of MSK signal in each symbol to calculate the amplitude of the carrier frequencies of 1 code and 0 code,and then recover the digital signal by judging the amplitudes.The system performance of this algorithm in presence of Gauss white noise is analyzed.The computer simulation indicates that the algorithm meeds less calculation and has good performance of anti-interference.The bit synchronization deviation of the new algorithm is less sensitive than that of the classic algorithm. |
| Keywords: | MSK Digital demodulation DFT Error bit rate |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |