| As an emerging wireless communication technology,Low Earth Orbit(LEO)satellite communication has broad application prospects and market potential.Meanwhile,5G network is the most advanced wireless mobile communication technology with features such as low latency,high speed,high reliability and high connectivity.Therefore,the combination of the two technologies has given birth to the LEO satellite communication system based on the principles of 5G technology.In the research of LEO satellite communication system based on 5G technology,the channel is a wireless channel used to transmit data in 5G network,which consists of multiple sub-channels.The physical shared channel plays a crucial role in carrying both uplink and downlink user data and multiplexing control information.This paper focuses on the construction of the channel under 400 M channel bandwidth and 120 k subcarrier spacing based on the principles of 5G technology.The research mainly focuses on the construction of the uplink and downlink physical shared channels based on the principles of 5G technology from the perspective of terminal in the LEO satellite communication system based on 5G technology.Combining parallel scheduling of uplink and downlink multiple time slots,in each uplink time slot,part of the data is processed in parallel,combined with the algorithm of the ARM acceleration library,through multi-core processor parallel processing,based on the existing ARM+FPGA hardware resources,the terminal realizes Under the 125 us time slot interval,the physical resource block of the uplink full time slot is 256,and the Modulation and Coding Scheme is 25.The error of the data vector amplitude is about 2.89%.The uplink transmission data is solved by simulation,and the success rate is 96%.The downlink full time slot decodes the data configured with Physical Resource Block of 264 and Modulation and Coding Scheme of 22,and the terminal decoding can achieve a success rate of more than 95%. |
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