CAJ | 학술논문

提供一种精度高,算法简单,开销小的 OFDM 系统采样时钟同步算法,该算法采用一种基于精细频率估计的方法估计采样时钟频谱偏差,然后运用改进的 Farrow 滤波器实现信号采样率的转换,纠正采样时钟频率偏差,对于残留采样时钟偏差导致的相位偏转,使用相位补偿对其进行纠正.经过仿真和分析发现使用该算法可完全克服采样时钟频率偏差对OFDM 系统造成的影响,达到高精度采样时钟同步.
제공일충정도고,산법간단,개소소적 OFDM 계통채양시종동보산법,해산법채용일충기우정세빈솔고계적방법고계채양시종빈보편차,연후운용개진적 Farrow 려파기실현신호채양솔적전환,규정채양시종빈솔편차,대우잔류채양시종편차도치적상위편전,사용상위보상대기진행규정.경과방진화분석발현사용해산법가완전극복채양시종빈솔편차대OFDM 계통조성적영향,체도고정도채양시종동보.
The paper presents a high precision and simple sampling clock synchronization algorithm with little overhead for OFDM system. The algorithm based on fine frequency estimation method estimates the sampling clock frequency spectrum bias, and then the improved Farrow filter converts the signal sampling rate to correct the deviation of the sampling clock frequency, and correct deflection of the phase due to the residual sampling clock skew using phase compensation. The simulation and analy?sis results show that the proposed algorithm can completely overcome the impact of the sampling clock frequency deviation on OFDM system and achieve high?precicion sampling clock synchronization.