GSM信道中数字信号传输的同步算法设计与实现  

Design and Implementation of Synchronization Algorithm for Digital Signal Transmission in GSM Channel

作　　者：庄浩宇 ZHUANG Hao-yu(School of Information Science and Engineering,Southeast University,Nanjing Jiangsu 211189,China)

机构地区：[1]东南大学信息科学与工程学院,江苏南京211189

出　　处：《通信技术》2018年第9期2028-2033,共6页Communications Technology

基　　金：国家自然基金项目(No.61571110)~~

摘　　要：在利用GSM信道进行信号传输的过程中,声码器对音频进行参数编码对调制信号带来的失真影响较为严重,从而很难利用GSM信道稳定地进行信号和数据的传递。因此,设计了一种针对移动电话的MELPe声码器和GSM信道的信号帧同步算法,能够对传输的信号帧进行较为稳定的捕捉,且能够在经过信号盲区后重新同步,避免在不稳定的GSM通信中产生同步丢失的情况。最后,以STM32单片机开发平台的实现为例,经过测试和统计,证明该系统达到了误码率低于2%的稳定数据传输。Due to the parameters-based encoding algorithm of codecs,the quality of signal transmitted over GSM channels is significantly affected,destroying the stability of such transmission.A synchronization algorithm is proposed so as to overcome the negative effects of MELPe codecs in mobile phones and GSM channels,and make it possible for the signal frames to be captured steadily.At the same time,it could also produce the ability of re-synchronization after a compromise caused by going through blind zones,avoiding the loss of synchronization in these circumstances.The implementation example on STM32 MCU development platform is given.Testing and statistics indicate that the system could achieve stable data transmission with bit error rate of less than 2%.

关 键 词：GSM信道 帧同步 单片机开发 重同步 

分 类 号：TN929.5[电子电信—通信与信息系统]