中文摘要：

对OFDM广播系统中前导符号的频域结构进行了研究，提出了一种固定序列和信令序列奇偶交错排列的新结构．其中固定序列可用于整数倍频偏估计和信道估计，信令序列用于承载信令内容。基于该结构，给出了一个前导符号频域的具体方案与参数。介绍了适用于该种结构的接收算法，并基于上述参数与算法进行了仿真试验。仿真结果表明，该种前导符号频域结构具有优异的检测与解码性能，能够适用于各类固定及移动场景。

英文摘要：

Preamble symbol frequency structure of OFDM system is studied in this paper. A novel structure with interlaced fixed ＇ and signaling sequences is proposed, where the fixed sequence is mainly used for integer frequency offset （IFO） estimation and/or channel estimation, while signaling sequence is used to convey signaling information. A detailed design based on the structure is provided. Corresponding receiving algorithm is also discussed. The outstanding performance is proved by simulations and its future i implementation is promised.