| 基于扫频算法的QAM载波恢复技术研究 |
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| 引用本文： | 汪建,刘华平,刘贤华.基于扫频算法的QAM载波恢复技术研究[J].电视技术,2011,35(5):57-61. |
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| 作者姓名： | 汪建 刘华平 刘贤华 |
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| 作者单位： | 汪建,WANG Jian(重庆邮电大学,重庆,400065);刘华平,刘贤华,LIU Huaping,LIU Xianhua(重庆四联微电子有限公司,重庆,401121) |
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| 基金项目： | 重庆市重大科技攻关项目 |
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| 摘 要： | 针对QAM调制解调方案,探讨一种行而有效的载波恢复技术.扫频算法具有极大的频偏捕获能力,在扫频算法的基础上结合面向判决算法,实现了对载波大范围内频偏的捕捉和跟踪;改进了扫频门限的设定方法,使得在各种QAM制式下该算法都具有快速的频偏捕捉能力.Matlab仿真结果表明,该方法性能可靠,频偏捕捉范围可达5%符号率,适用于高...
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| 关 键 词： | 载波恢复 扫频 面向判决 QAM |
Research Based on QAM Carrier Recovery Method of Sweeping Algorithm |
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| WANG Jian,LIU Huaping,LIU Xianhua.Research Based on QAM Carrier Recovery Method of Sweeping Algorithm[J].Tv Engineering,2011,35(5):57-61. |
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| Authors: | WANG Jian LIU Huaping LIU Xianhua |
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| Affiliation: | WANG Jian1,LIU Huaping2,LIU Xianhua2(1.Chongqing University of Posts and Telecommunications,Chongqing 400065,China,2.SicMicroelectronics Co.,Ltd.,Chongqing 401121,China) |
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| Abstract: | With the reference to the QAM,an effective carrier recovery method is integrated.Based on the great capability of sweeping algorithm to capture frequency offset,capturing and tracking of that in big range is accomplished associated with decision directed method.Also an improved design of sweeping threshold is used under all of the rank of QAM,making the algorithm have ability to capture frequency offset fast.The simulation results with Matlab shows that the method discussed is of reliability and reaches 5% ... |
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| Keywords: | QAM |
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