LDPC码在深空通信中的兼容编码技术

Universal encoder for LDPC codes in deep space communications

摘要:

信道编码是提高卫星通信数据传输链路可靠性的关键技术，空间数据系统咨询委员会(CCSDS)标准推荐了1组适用于深空通信的低密度奇偶校验(LDPC)码。针对卫星通信信道的不同需求，设计了1个可以实现CCSDS标准中推荐的适于深空通信的所有LDPC码编码的兼容编码器，从而节省星上硬件资源，提高星载的可靠性和可移植性。利用VHDL语言在FPGA上实现了该编码器，通过仿真验证，表明该编码器在大大节省硬件资源的同时，能够正确完成编码。

Abstract:

Channel code is a key technique in satellite communications to improve reliability of lines of communication. The class of Low Density Parity Check(LDPC) codes is recommended by Consultative Committee for Space Data Systems(CCSDS) for application in deep space communication. To meet different requirements of varied space communication channels，a universal encoder that implements all codes in CCSDS is designed. It can save hardware resources and improve intersatellite availability for transplanting. Using VHDL language，the encoder is implemented on FPGA with less resources. The simulation results have verified the correction of the encoder.