基于π/4QPSK的NC-OFDM系统在舰船通信系统中的设计  

Design and application of NC-OFDM system based on π/4 QPSK in ship communication

作　　者：周国良 Zhou Guoliang(Jiangsu Automation Research Institute,Lianyungang 222000,China)

机构地区：[1]江苏自动化研究所

出　　处：《电子测量技术》2019年第23期128-131,共4页Electronic Measurement Technology

摘　　要：随着海面上舰船数据通信需求的突发式增长,原有的无线通信系统很难满足舰船间繁重的数据交换需求,提出的基于π/4QPSK的NC-OFDM系统能够充分将π/4QPSK同步信息充足、频域信息更加聚集与OFDM系统频谱利用率高、子载波分布灵活等特点有效结合。本文通过MATLAB平台进行仿真验证,仿真结果表明,所设计的系统能够有效应对海上复杂的环境,相比较于原有基于QPSK的OFDM系统,能够有效改善系统的功率效率,当信噪比大于10dB时,系统误码率可以达到10^-4以下,同时相比较于QPSK调制方式可以有效降低系统PAPR约5%。With the sudden growth of data communication demand of warships on the sea,the original wireless communication system is difficult to meet the needs of data exchange.The NC-OFDM system based onπ/4 QPSK proposed in this paper fully combines the characteristics of more synchronization information,more aggregated frequency domain information with the characteristics of OFDM system,such as high spectrum utilization,flexible subcarrier distribution and so on.In this paper,the MATLAB platform is used to verify the simulation results.The simulation results show that the system designed in this paper can effectively cope with the complex marine environment.Compared with the original QPSK OFDM system,it can effectively reduce the PAPR of the system.When the signal-to-noise ratio is greater than 10 dB,the system error rate can reach below 10-4.It can also effectively reduce PAPR by about 5%at the same time.

关 键 词：4QPSK NC-OFDM 认知无线电 PAPR 

分 类 号：TN919[电子电信—通信与信息系统]