| 基于多门限极性判决的QAM载波恢复算法 |
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| 引用本文： | 宋晓勤,胡爱群,宋平.基于多门限极性判决的QAM载波恢复算法[J].电路与系统学报,2009,14(1). |
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| 作者姓名： | 宋晓勤 胡爱群 宋平 |
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| 作者单位： | 东南大学,信息科学与技术学院,江苏,南京,210096 |
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| 基金项目： | 江苏省网络与信息安全重点实验室资助基金，南京航空航天大学人才引进资助基金 |
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| 摘 要： | 正交幅度调制(QAM)是现代通信中最为常用的一种调制方法,其载波恢复是决定接收机性能的关键因素之一.从提高收敛速度和减小锁定误差的角度出发,提出了一种用于QAM解调的多门限极性判决载波恢复算法,该算法充分利用QAM星座图中对角线上锁定误差为零的信号点,增加了用于提取相位误差的符号集.分析和仿真表明,与传统的面向判决载波恢复算法相比,该算法不仅保留了极性判决载波恢复算法频偏搜索范围大的优点,且能进一步提高收敛速度.
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| 关 键 词： | 正交幅度调制(QAM) 载波恢复 面向判决(DD) 极性判决 多门限极性判决 |
A carrier recovery algorithm based on multi-threshold polarity decision for QAM |
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| SONG Xiao-qin,HU Ai-qun,SONG Ping.A carrier recovery algorithm based on multi-threshold polarity decision for QAM[J].Journal of Circuits and Systems,2009,14(1). |
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| Authors: | SONG Xiao-qin HU Ai-qun SONG Ping |
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| Affiliation: | SONG Xiao-qin,HU Ai-qun,SONG Ping(School of Information Science , Engineering,Southeast University,Nanjing 210096,China) |
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| Abstract: | Quadrature Amplitude Modulation(QAM) is widely applied in modern communications systems.The carrier recovery is one of the key factors,which decides the overall performance of the receiver.A multi-threshold polarity decision algorithm is proposed for QAM carrier recovery having the advantage of increasing convergence speed and minimizing the lock error.This algorithm fully utilizes the signal points with zero lock error on the diagonal lines of the QAM constellation so that adds the number of symbol set to ... |
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| Keywords: | Quadrature Amplitude Modulation(QAM) carrier recovery decision directed polarity decision multi-threshold polarity decision |
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