BGAN信号译码设计与实现  

Decoding Design and Implementation of BGAN Signal

作　　者：汪洋[1] WANG Yang(Unit 91404 of PLA,Qinhuangdao Hebei 066001,China)

机构地区：[1]91404部队

出　　处：《通信技术》2019年第8期1849-1854,共6页Communications Technology

摘　　要：深入研究了海事卫星BGAN系统的通信信号的数据帧结构、编码方法,提出了对BGAN信号的译码器设计与译码算法设计。算法基于Log-map算法,通过对解调后的IQ数据,进行软信息计算,turbo迭代译码,CRC校验,实现对BGAN信号的快速译码,并为后续协议层分析提供重要的前提。仿真结果表明,算法能够在较低的信噪比下实现对BGAN信号的快速译码。此外,该算法实时性好、译码性能高,通用性好,能满足实际工程实现的需要。By studying the data frame structure and frame coding of communication signal of Inmarsat BGAN system,the design of decoder and decoding algorithm of Inmarsat BGAN signals is proposed.Based on the Log-map algorithm,the soft information calculation,turbo iterative decoding and CRC check are performed on the demodulated IQ data,thus realizing the fast decoding of BGAN signals and providing an important premise for subsequent protocol layer analysis.The simulation results indicate that the algorithm can decode the BGAN signal quickly at a lower SNR.In addition,the algorithm,with good real-time performance,high decoding performance and good versatility,can meet the needs of practical engineering implementation.

关 键 词：BGAN信号 TURBO译码 CRC校验 软信息 

分 类 号：TN918[电子电信—通信与信息系统]