基于数据分解的高速QPSK并行解调方法  

High-speed QPSK parallel demodulation method based on data decomposition

作　　者：闫迪 王元钦 吴涛 孙克[2] YAN Di;WANG Yuanqin;WU Tao;SUN Ke(Department of Electronic and Optical Engineering,Space Engineering University,Beijing 101416,China;Beijing Aerospace Control Center,Beijing 102206,China)

机构地区：[1]航天工程大学电子与光学工程系,北京101416 [2]北京航天飞行控制中心,北京102206

出　　处：《系统工程与电子技术》2018年第7期1600-1607,共8页Systems Engineering and Electronics

基　　金：国家自然科学基金(61271265)资助课题

摘　　要：使用通用处理器进行信号处理具有灵活性、可扩展、易维护等优点,是未来软件无线电发展的趋势之一。提出了一种基于数据分解的高速正交相移键控(quadrature phase shift keying,QPSK)并行解调方法,该方法将串行信号流分解为信号块,通过对多个信号块的并行处理,实现高速率QPSK解调。为了消除各信号块处理之间的依赖性,在最大似然理论基础上提出了一种基于三维迭代搜索的QPSK开环解调算法。为了消除各信号块解调结果之间的相位模糊,提出了一种基于数据冗余的模糊一致性方法。仿真结果表明,该并行解调方法的信噪比损失在0.1dB以内。在惠普Z820工作站上搭建调制解调系统,测得解调信息速率为1 154.2 Mbps。The use of common processors for signal processing has the advantages of flexibility,extensibility,and maintainability,and is one of the trends of future software radio development.This paper proposes a parallel high-speed quadrature phase shift keying（QPSK）demodulation method based on data decomposition.This method decomposes serial signal flow into signal blocks,then high-speed QPSK demodulation is achieved by parallel processing of multiple signal blocks.In order to eliminate the dependence of signal blocks processing,an open loop demodulation algorithm based on three-dimensional iterative search is proposed.In order to eliminate the phase ambiguity between the demodulation of each signal block,an ambiguity consistency method based on data redundancy is proposed.The simulation results show that the signal-to-noise ratio loss of the parallel demodulation method is less than 0.1 dB.The demodulation system is built on the HP Z820 workstation,and the demodulation information rate is 1 154.2 Mbps.

关 键 词：数据分解 高速正交相移键控 并行解调 三维迭代搜索 相位模糊 

分 类 号：TN92[电子电信—通信与信息系统]