CAJ | 학술논문

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。
감우CDMA2000계통하행동보과정중빈편고계적중요성，침대전통적시빈이유연합고계산법존재계산복잡도고차불능쾌속근종빈편상태적결점，제출료일충기우전향도빈신호적빈편교정산법，즉제취도빈신호작삼고，재계통능구용인적최대빈편범위내대전향신도진행빈편상편보상。실험결과표명，해산법재CDMA2000고속이동배경하，능구련속쾌속대빈편상편진행교정。
In view of the importance of frequency offset estimation in the downlink synchronization for CD-MA2000 system and the disadvantage of the time-frequency two-dimensional traditional joint estimation al-gorithm’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 off-set 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.