IEEE 802.11a无线局域网系统中的雷达信号检测方法  

Radar Signal Detection in IEEE 802.11a WLAN Systems

作　　者：王希[1] 马雯[1] 罗汉文[1] 

机构地区：[1]上海交通大学电子工程系

出　　处：《电子工程师》2006年第5期1-2,11,共3页Electronic Engineer

摘　　要：为了与5 GHz频段内的雷达系统共存,IEEE 802.11a无线局域网系统必须采用动态频率选择机制。当检测到有使用相同无线信道的雷达系统存在时,可根据需要转换到其他信道。文中对雷达信号的特征及现有的雷达信号检测方法进行了总结,并给出了其他候选的雷达信号检测方法。通过对各种方法的分析比较,给出了一种基于功率检测的雷达信号检测方法,该方法易于实现且具有较好的性能。In order to coexist with radar in the 5 GHz frequency band, Dynamic Frequency Selection （DFS） mechanisms must be adopted for IEEE 802.11a systems. DFS mechanisms are employed to detect interference from radar systems to enable avoidance of co-channel operations. Firstly, characteristics of radar signals are summarized, and several known radar signal detection algorithms are surveyed. By utilizing characteristics of radar signals, some other candidate algorithms are suggested. Through the analysis of above algorithms, a simple and prospective method based on power detection in time domain is suggested, and some considerations for applying the method are illustrated as well.

关 键 词：雷达信号检测 IEEE 802.11a 动态频率选择 

分 类 号：TN957.51[电子电信—信号与信息处理]