摘要
提出一种适用于有广播信道的低速卫星通信系统校频算法。在该算法中,各地球站首先对接收网管广播信道的载波频差进行估计,然后在此基础上估计各站参考源频率及卫星转发器的本振频率,最后再根据估计结果对发射载波频率或收载波频率进行开环补偿,以实现通信信号的快速同步。数学分析和试用结果表明,该算法可以解决有广播信道的低速突发卫星信号的快捕问题。
A frequency offset correction algorithm suitable for low symbol rate satellite communication systems is presented. In this algorithm,each earth station first estimates the carrier frequency offset of the received network management broadcast channel, and then estimates the frequency of the reference source of each station and the LO frequency of satellite transponder, and finally,open loop frequency compensation is added to the transmitter or the receiver to achieve fast synchronization of the communication signal.
出处
《无线电工程》
2007年第5期55-56,共2页
Radio Engineering
关键词
卫星通信
系统校频
频率估计
快速同步
satellite communication
system frequency offset correction
frequency estimation
fast synchronization
