CAJ | 학술논문

正交频分复用（OFDM）系统对同步误差非常敏感,特别是与频分多址（FDMA）、时分多址（TDMA）、和码分多址（CDMA）等多址方式结合使用时,同步显得尤为重要。首先对OFDM系统进行了描述,然后介绍了两种传统的经典OFDM同步算法,即Schmidl＆Cox算法和Park算法,针对OFDM系统中对同步要求较高的问题,提出了针对训练序列的一种新的算法,在符号同步其它性能指标不变的情况下,该算法抗噪声和抗多径性能好,符号定时同步精确,在高斯环境下定时误差很小。
정교빈분복용（OFDM）계통대동보오차비상민감,특별시여빈분다지（FDMA）、시분다지（TDMA）、화마분다지（CDMA）등다지방식결합사용시,동보현득우위중요。수선대OFDM계통진행료묘술,연후개소료량충전통적경전OFDM동보산법,즉Schmidl＆Cox산법화Park산법,침대OFDM계통중대동보요구교고적문제,제출료침대훈련서렬적일충신적산법,재부호동보기타성능지표불변적정황하,해산법항조성화항다경성능호,부호정시동보정학,재고사배경하정시오차흔소。
Orthogonal Frequency Division Multiplexing (OFDM) systems are very sensitive to the synchronization error,particularly with fi'equencydivisionmultipleaccess (FDMA), Time Division Multiple Access (TDMA),and Code Division Multiple Access (CDMA) multiple access mode when used in combination,synchronization is very important. The OFDM system is described,and then introduces two kinds of traditional classical OFDM synchronization algorithm,namely Schmidl&Cox algorithm and Park algorithm. As for the OFDM system for synchronous request higher problem,proposed in view of the training sequence of a new algorithm of symbol synchronization,in other performance indicators remain unchanged,the algorithm of noise and multipath performance is good,symbol timing synchronization precision,in Gauss environment timing error is very small.