Timing Synchronization for Interleaved OFDMA Uplink System
This paper presents a symbol timing synchronization method for interleaved OFDMA uplink system in broadband multipath Rayleigh channel. The proposed timing synchronization method contains two steps: coarse and fine time synchronization. The coarse time synchronization is desired to locate the strongest path while the fine time synchronization is desired to locate the first path. And both of the coarse and fine time synchronizations are performed in time domain. Two OFDM symbols are designed for timing synchronization, of which the first is for coarse time synchronization and the second is for fine time synchronization. The user specific pilot signals are constructed in the whole obtained system band in the coarse timing preamble while the user exclusive subcarrier set in the fine timing preamble. In fine time synchronization scheme, for the user specific pilot signals are constructed in different subchannels, they have special ideal autocorrelation and cross-correlation properties, which can well suppress the multi-user interferences. Simulations have been performed in MATRICE channel C, which demonstrate that the proposed timing synchronization method can work well in interleaved OFDMA uplink system. And the proposed timing estimator is also robust in frequency asynchronous environment.
En Zhou Hui Zhao Wenbo Wang
Wireless Signal Processing and Network Lab Beijing University of Posts and Telecommunications, Beijing 100876, China
国际会议
2006 International Conference on Communications,Circuits and Systems(第四届国际通信、电路与系统学术会议)
广西桂林
英文
1147-1152
2006-06-25（万方平台首次上网日期，不代表论文的发表时间）