| 数字中频接收机中高精度符号定时同步研究 |
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| 引用本文： | 乔亚琼,魏宗寿,张驰.数字中频接收机中高精度符号定时同步研究[J].科技信息,2009(9). |
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| 作者姓名： | 乔亚琼 魏宗寿 张驰 |
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| 作者单位： | 兰州交通大学光电技术与智能控制教育部重点实验室; |
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| 摘 要： | 论文研究了数字中频接收机的符号定时同步.在推导高采样率定时恢复可以实现高精度符号同步的基础上,提出一种高精度数字中频符号定时恢复方法.此方法属于反馈内插恢复,可以结合数字下变频在FPGA或ASIC中实现,提高跟踪速度和精度.最后对QPSK信号进行了仿真,仿真结果表明了该方法的可行性和实用性。
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| 关 键 词： | 符号定时同步 数字中频 Gardner检测 |
A HIGH PRECISE RESEARCH FOR SYMBOL TIMING SYNCHRONIZATION OF IF DIGITAL RECEIVER |
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| QIAO Ya-qiong WEI Zong-shou ZHANG chi.A HIGH PRECISE RESEARCH FOR SYMBOL TIMING SYNCHRONIZATION OF IF DIGITAL RECEIVER[J].Science,2009(9). |
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| Authors: | QIAO Ya-qiong WEI Zong-shou ZHANG chi |
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| Institution: | Key Laboratory of Optoelectronic Technology and Intelligent Control;Ministry of Education;Lanzhou Jiaotong University;Lanzhou Gansu 730070 |
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| Abstract: | The paper studies symbol time synchronization of digital IF receiver. It deduces that the receiver can achieve high precise through symbol time recovery with high sample rate. Upon this,in this paper,a symbol time synchronization scheme is presented for digital IF receiver. It belongs to the category of feedback recovery,and it can implement in FPGA or ASIC through combining digital down conversion. So the proposed scheme has rapid track pace and high precise. At last,the paper simulates the symbol timing r... |
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| Keywords: | Symbol Time synchronization Digital IF Gardner detector |
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