WLAN接收机分组检测算法分析与改进

Analysis and Improvement of Packet Detection Algorithms for WLAN Receiver

分组检测是WLAN接收机工作的第一步,其算法的好坏直接影响着接收机的同步等工作性能。通过分析几种IEEE802.11a接收机分组检测算法,提出了一种基于短训练序列的改进算法—双自相关分组检测算法并把这种算法和传统的延时相关算法进行了仿真和性能分析比较。结果说明:这种基于短训练序列的双自相关分组检测算法的性能优于传统的延时相关算法。

Packet detection is the first step to receiver of WLAN. Packet detection algorithms affect WLAN receiver's performance, such as synchronization and so on. An improvement packet detection algorithm is presented based on short training sequences through analyzing several packet detection algorithms of IEEE802.11a receiver. The algorithm is double auto-correlation packet detection algorithm. It can be confirmed that the performance of the proposed algorithm is superior to conventional packet detection algorithms through simulation and analysis.