CAJ | 학술논문

LTE( Long Term Evolution)系统中，作为小区搜索的第一步，符号定时算法需要具备很强的鲁棒性。为了进一步增强现有符号同步算法的抗频偏性能，提出了一种优化的符号同步算法。该算法一方面保持已有分段相关同步算法的优点，同时考虑结合预频偏处理来进行符号定时与粗频偏的联合估计，再将多个相关运算集做叠加处理。理论分析和仿真实验结果表明，在多径信道下，所提算法在完成符号定时和粗频偏估计的同时，大大提高了系统抗频偏性能。
LTE( Long Term Evolution)계통중，작위소구수색적제일보，부호정시산법수요구비흔강적로봉성。위료진일보증강현유부호동보산법적항빈편성능，제출료일충우화적부호동보산법。해산법일방면보지이유분단상관동보산법적우점，동시고필결합예빈편처리래진행부호정시여조빈편적연합고계，재장다개상관운산집주첩가처리。이론분석화방진실험결과표명，재다경신도하，소제산법재완성부호정시화조빈편고계적동시，대대제고료계통항빈편성능。
In 3GPP Long Term Evolution (LTE) system, symbol timing algorithm, as the first step of cell search, is required a very strong robustness. An improved symbol synchronization algorithm is proposed for further enhancing the performance of anti-frequency-offset of the existing symbol synchronization algo-rithm. The algorithm keeps the advantages of partial correlation synchronization algorithm, and combines with frequency offset pre-processing to perform timing and coarse frequency offset joint estimation effective-ly, and then accumulates multiple correlation operation sets. Both the theoretical analysis and simulation results show that the proposed algorithm greatly improves the performance of anti-frequency-offset, while completing the timing and coarse frequency offset estimation under the multi-path channel.