一种改进的基于信号状态矢量的循环数据块构造  

Improved cyclic block construction based on signal state vectors

作　　者：王海涛[1] 葛黄徐 郭一凡 周赞东[1] 张洪斌 Wang Haitao;Ge Huangxu;Guo Yifan;Zhou Zandong;Zhang Hongbin(Wuhan NARI Limited Liability Company of State Grid Electric Power Research Institute, Wuhan 430074, China;State Grid Zhejiang Electric Power Co., Ltd. Jiaxing power supply Company, Jiaxing 314033, China;School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731,China)

机构地区：[1]国网电力科学研究院武汉南瑞有限责任公司,武汉430074 [2]国网浙江省电力公司嘉兴供电公司,嘉兴314033 [3]电子科技大学信息与通信工程学院,成都611731

出　　处：《电子测量与仪器学报》2019年第6期128-133,共6页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金(51777037);国家电网有限公司总部科技项目(52110417000W)资助

摘　　要：讨论了一种单载波频域均衡SOQPSK-TG系统的循环卷积数据块的构造方法。对于SOQPSK-TG的频域均衡,除了在每一个数据块前插入循环前缀以对抗ISI,还需要插入额外的一段infrafix符号片段以保证数据块满足循环卷积和相位连续特性。在频域均衡CPM的intrafix符号构造方法的基础上,给出了适用于有预编码器结构的SOQPSK-TG信号的intrafix符号构造方法。对于频率脉冲约束长度为8的SOQPSK-TG信号,仅使用2个infrafix符号就可以使数据块满足循环卷积,并且数据块块间和块内的相位保持连续。然后对SOQPSK-TG信号基于过采样和Laurent PAM分解进行频域均衡。仿真结果表明,在过采样信号模型下,3种intrafix符号构造方法的频域均衡性能基本相当;在PAM分解模型下,改进的使用2个infrafix符号的数据结构与其他两种方案相比性能损失在0. 2 dB以内。The problem of cyclic block construction for single carrier frequency domain equalization( FDE) of SOQPSK-TG is considered in this paper,for FDE of SOQPSK-TG,a cyclic prefix signal is required to counter ISI in each data block,and an additional intrafix segment is also needed to guarantee circular convolution and continuous phase. Based on the cyclic block construction methods for CPM with FDE,a methods is proposed to compute the intrafix symbols for SOQPSK-TG with a precoder. For SOQPSK-TG with 8 symbols constraint of the frequency shaping pulse,only 2 intrafix symbols can make the data block satisfying circular convolution and maintaining continuous phase in inter block and intra block. Then,over sampling signal model and Laurent’s PAM decomposition are applied to FDE of SOQPSK-TG. Simulation results show that the performance is almost similar using three intrafix symbol construction methods based on over sampling signal model;and based on the PAM decomposition model,the performance loss of the method using only 2 infrafix symbols is within 0. 2 dB compared with the other two schemes.

关 键 词：SOQPSK-TG 循环前缀 infrafix符号 频域均衡 

分 类 号：TN911.5[电子电信—通信与信息系统]