摘要
接收机是遥测系统的关键部件;针对全数字接收机,回顾和比较了几种传统非数据辅助定时估计算法,总结了不同算法的优劣和应用场合;针对遥测数字接收机中的QPSK解调器的符号同步环节,提出了一种易于FPGA实现的定时估计结构;通过计算机仿真和硬件实现表明,与传统定时估计器实现相比,该结构在保证估计性能和速度的前提下降低了设计复杂度,节省了硬件乘法器和片上ROM等重要逻辑资源,在遥测数字接收机的设计中具有一定实用价值。
Receiver is the key component o{ telemetry, several non--data--aided feed--forward symbol timing estimating algorithms was reviewed and introduced of advantages and disadvantages. For symbol synchronization of QPSK signals, a simple FPGA implementation structure was introduced. Simulations and tests proved that compared with implementation of other conventional symbol timing estimator, the implementation complexity was reduced and logic resources saved.
出处
《计算机测量与控制》
北大核心
2013年第9期2538-2540,共3页
Computer Measurement &Control
关键词
遥测
接收机
符号同步
定时估计
telemetry
receiver
symbol synchronization
timing estimate