| QPSK信号相干载波提取的仿真研究 |
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| 引用本文： | 刘会杰,张乃通.QPSK信号相干载波提取的仿真研究[J].系统工程与电子技术,2003,25(4):394-396. |
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| 作者姓名： | 刘会杰 张乃通 |
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| 作者单位： | 哈尔滨工业大学通信技术研究所,黑龙江,哈尔滨,150001 |
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| 基金项目： | 哈尔滨工业大学博士科研启动基金 |
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| 摘 要： | 研究了数字无线通信系统中DSSS-QPSK信号的数字化接收技术。在一体化的解扩/解调数字处理方式中,相干载波提取的数字化实现是一个关键环节。基于对Costas环结构的分析以及相应数学模型的推导,建立了模拟Costas环和数字Costas环的工作模型。通过仿真的方法给出了两种环路结构对目标信号进行相干载波提取的结果。所做工作表明,数字Costas环更适合于对目标信号的相干载波提取。
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| 关 键 词： | QPSK Costas环 零中频 软件无线电 |
| 文章编号： | 1001-506X(2003)04-0394-03 |
| 修稿时间： | 2002年9月30日 |
Simulation Research on Coherent Carrier Extraction for QPSK Signals |
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| LIU Hui-jie,ZHANG Nai-tong.Simulation Research on Coherent Carrier Extraction for QPSK Signals[J].System Engineering and Electronics,2003,25(4):394-396. |
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| Authors: | LIU Hui-jie ZHANG Nai-tong |
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| Abstract: | Digital reception of DSSS-QPSK signals is studied in this paper. The digitization of coherent carrier extracton is a key part in integrated processing of dispreading and demodulation. Based upon a thorough analysis of COSTAS loop structure and relevant mathematical model, two kinds of COSTAS loops are presented, and simulation results are provided for processing the given signal with these two COSTAS loop structures. From the work done, it can be seen that the digital COSTAS loop structure is more suitable for the carrier synchronization of the DSSS-QPSK signals. |
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| Keywords: | QPSK Costasloop Zero IF Software radio |
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