卫星通信中基于Gardner算法的抗载波偏差法  

Anti-carrier deviation′s method based on Gardner algorithm in satellite communication

作　　者：封彬 赵艳丽[2] 刘剑锋 刘期烈[2] 

机构地区：[1]国家移动卫星通信工程技术研究中心,江苏南京210000 [2]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《电子技术应用》2014年第4期103-105,共3页Application of Electronic Technique

基　　金：国家863项目(2012AA01A507);国家自然科学基金项目(61071118);重庆市教委科研项目(KJ111506;KJ110524);重庆市自然科学基金项目(CSTC2010BA4010)

摘　　要：鉴于信号载波频率偏差引起较大的误码等缺点,在Gardner改进算法(E-Gardner)的基础上提出了一种抗载波偏差的时钟误差检测算法(AC-Gardner),该算法解决了E-Gardner算法受载波频差和相差影响的问题。仿真结果表明,在Corazza信道环境下AC-Gardner算法能有效地消除载波偏差的影响,提高了整个系统的同步性能。In view of disadvantage of the larger bit error rate caused by signals＇ carrier frequency deviation, this paper pro- poses a clock error detection algorithm of anti carrier deviation（AC-Gardner） based on the evolved Gardner algorithm（E-Gardner）, which solves the problem that E-Gardner algorithm is easily influenced by carrier frequency offset and phase offset. Simulation re- sults show that AC-Gardner algorithm can effectively eliminate the effect of carrier deviation, and improve the synchronization per- formance of the whole system under Corazza channel environment.

关 键 词：卫星通信 定时同步 载波偏差 GARDNER算法 Corazza信道 

分 类 号：TN927[电子电信—通信与信息系统]