摘要
在正交频分复用(OFDM)系统中,帧同步对系统性能起到十分重要的作用.针对IEEE 802.16标准,提出了一种基于前导结构的帧同步算法.文中提出的自相关差分算法产生一个尖锐的最大峰,显著降低了传统算法中由于存在峰值平台带来的不确定性,与传统的算法相比,具有更好的鲁棒性和抗噪声性能.理论分析和仿真结果表明,该算法帧同步准确,复杂度适中,是一种适用于IEEE 802.16标准的优化的帧同步算法.
In the orthogonal frequency division multiplexing （OFDM） system, the frame synchronization plays an important role in the performance of system. A frame synchronization algorithm based on the preamble structure was proposed for IEEE 802.16 standard. Compared with conventional method, the proposed auto- correlation difference algorithm had better robustness and anti- noise ability. It produces a keen- edged peak and reduces the plateau＇s uncertainty of the traditional method. Theoretical analysis and simulation results demonstrate that the proposed algorithm provides accurate synchronization and appropriate complexity, thus this algorithm is an optimized frame synchronization algorithm for IEEE 802.16 OFDM system.
出处
《应用科技》
CAS
2009年第3期23-25,30,共4页
Applied Science and Technology
