| 摘要: |
| 鉴于CDMA2000系统下行同步过程中频偏估计的重要性，针对传统的时频二维联合估计算法存在计算复杂度高且不能快速跟踪频偏状态的缺点，提出了一种基于前向导频信号的频偏校正算法，即提取导频信号作参考，在系统能够容忍的最大频偏范围内对前向信道进行频偏相偏补偿。实验结果表明，该算法在CDMA2000高速移动环境下，能够连续快速对频偏相偏进行校正。 |
| 关键词: CDMA2000 导频校正 载波频偏 相偏 补偿算法 基带算法 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目（61301126）；重庆市基础与前沿研究计划项目（cstc2013jcyjA40041）；重庆邮电大学博士启动基金（A2012-33）；重庆邮电大学青年科学研究项目（A2012-77） |
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| Improvement and implementation of frequency and phase compensation algorithm based on CDMA system |
| TIAN Zeng-shan,GU Jie,WANG Yong |
| () |
| Abstract: |
| In view of the importance of frequency offset estimation in the downlink synchronization for CDMA2000 system and the disadvantage of the time-frequency two-dimensional traditional joint estimation algorithm′s high computational complexity and insensitivity for the tracking frequency offset state,this paper proposes an algorithm of frequency offset correction based on pilot signal, which can achieve frequency offset and phase offset compensation even for the maximum frequency offset. The experimental results show that the algorithm can realize frequency offset correction continuously and rapidly in CDMA2000 high-speed mobile environment. |
| Key words: CDMA2000 pilot correction phase offset frequency offset compensation algorithm baseband algorithm |
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