摘要
初始测距是IEEE 802.16e系统中实现网络初始接入的重要过程。针对IEEE 802.16e协议建立了初始测距信号模型,改进了原有频域检测算法。利用初始测距信号的循环对称性,将基站接收窗口的信号在时域上进行叠加,然后使用一种时频相结合的检测算法。结果表明该算法在检测性能上相对原有算法有着非常大的优势。
Initial ranging is an important process of initial access network in IEEE 802.16e systems. The initial ranging signal model is built, and an im- proved algorithm is proposed according to the IEEE 802.16e systems. First the signal in the receive window is superimposed in the base station because of the cyclic symmetry of the initial ranging signal ,then a time -frequency combined detection algorithm is proposed. The results show that there is a great advan- tage in the detection probability.
出处
《电视技术》
北大核心
2012年第9期100-102,共3页
Video Engineering
基金
国家自然科学基金项目(61071196)
教育部新世纪优秀人才支持计划项目(NCET-10-0927)
信号与信息处理重庆市市级重点实验室建设项目(CSTC
2009CA2003)
重庆市自然科学基金项目(CSTC
2009BB2287
CSTC
2010BB2398
CSTC
2010BB2411)
关键词
初始测距
信号模型
循环对称
时频结合
initial ranging
signal model
cyclic symmetry
time-frequency combined
