Research On Channel Estimation And Equalization Technology Of Low Papr Broadband Satellite Link

Satellite communication has developed rapidly since the 1990s.Relying on the advantages of wide coverage and large communication capacity,it is considered to be an essential means to establish global personal communication.With the explosive growth of Internet services,users’ requirements for data rate have gradually increased.The transmission rate of traditional satellite communication can no longer meet the needs of users.At the same time,in the traditional satellite communication system,there will be problems such as low efficiency of transmitter power amplifier and limited power of user.The traditional satellite communication system is facing a severe test.In order to solve the above problems,focusing on the current research hotspot in the field of satellite communication,this paper proposes a method of applying frequency domain generated SC-FDMA(single carrier frequency division multiple access)to satellite communication system,and focuses on the pilot based channel estimation technology.Based on the design of SC-FDMA satellite communication uplink service channel,this paper establishes a theoretical simulation platform based on Matlab and simulates and analyzes the two key problems:the performance difference of different pilot insertion modes in different channels and the performance difference of different pilot insertion modes under different channel estimation algorithms,The performance of pilot based channel estimation method is studied.At the same time,combined with the theoretical simulation results,this research topic determines the hardware system design scheme based on block pilot insertion mode and LS channel estimation algorithm.According to the design scheme,a hardware simulation platform based on Verilog language is built,and the hardware implementation of PUSCH uplink service channel receiver is completed.Finally,by comparing the hardware simulation results of important modules in the hardware simulation platform with the theoretical simulation results,the correctness of the design of the hardware simulation platform is verified.