摘要
IEEE802.11 a是无线局域网中最重要的标准之一,它采用的是OFDM技术.由于IEEE802.11 a系统特殊的前导训练序列,可以利用IEEE802.11 a前导训练序列的周期性而产生的自相关来进行帧粗同步,利用本地短训练序列与接收信号的互相关进行帧细同步.该文提出了2种帧同步算法,通过在多径衰落环境下计算机仿真证明,这2种算法较原有方法有较大的性能改善.
IEEE 802.11a is one of the most important standards of WLAN, which is based on OFDM technology. Owing to the special preamble training sequences of IEEE 802.11 a system, the coarse frame synchronization can be realized with auto-correlation posed by the periodicity of short training sequences, and the fine frame synchronization can be implemented using cross-correlation between local short training sequences and received signals. Simulation results in multi-path fading environment demonstrated that the synchronization performance of the proposed method is improved compared with the conventional methods.
出处
《应用科技》
CAS
2008年第5期37-41,共5页
Applied Science and Technology
