| 一种适用于高阶QAM载波恢复的改进型稳定性算法 |
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| 引用本文： | 钟自鸣,何松柏,王清,许恒飞.一种适用于高阶QAM载波恢复的改进型稳定性算法[J].世界科技研究与发展,2010,32(5):608-610. |
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| 作者姓名： | 钟自鸣 何松柏 王清 许恒飞 |
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| 作者单位： | 电子科技大学电子工程学院,成都610054 |
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| 摘 要： | 本文提出了一种结合频率相位载波恢复的数字QAM接收系统，将非零均值引入到Stop—and—Go控制器中，有效地解决了稳定状态的误差偏移较大的问题。仿真结果表明系统在15dB信噪比时，采用载波恢复电路只需7500个符号周期即可捕获达到6％符号率的频偏和30。的相偏，同时其稳态相位抖动亦显著减少到0．07。
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| 关 键 词： | 正交幅度调制 载波恢复 频率检测 相位检测 稳定算法 |
An Improved Stability Algorithm for High-level QAM Carrier Recovery |
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| ZHONG Ziming,HE Songbai,WANG Qing,XU Hengfei.An Improved Stability Algorithm for High-level QAM Carrier Recovery[J].World Sci-tech R & D,2010,32(5):608-610. |
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| Authors: | ZHONG Ziming HE Songbai WANG Qing XU Hengfei |
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| Affiliation: | (School of Electronics Engineering, University of Electronic Science and Technology of China, Chengdu 610054) |
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| Abstract: | A structure of the joint frequency-phase cmTier recovery loop for all-digital QAM receivers is proposed in this paper. The steady- state estimation variance is greatly reduced with a non-zero-mean input introduced to the Stop-and-Go controller. It has been verified by simu- lation tools that the frequency and phase can be offset up to 6% of the symbol rate and 30 degree respectively in only 7500 symbol periods, while its steady-state phase jitter also significantly reduces to 0. 07 degrees. |
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| Keywords: | quadrature amplitude modulation Carrier recovery frequency detection phase detection stability algorithm |
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