交织多址单步随机接入  

IDMA-Based One-Step Random Access

作　　者：别志松[1] 王伶[2] 吴伟陵[1] 

机构地区：[1]北京邮电大学信息工程学院,北京100876 [2]西门子(中国)公司研究院无线通信部

出　　处：《北京邮电大学学报》2007年第5期63-66,104,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金重大项目(90204001)

摘　　要：为了减小随机接入时延并降低碰撞概率,采用交织多址作为单步随机接入资源请求数据部分的多址接入方式,通过在数据段加入若干附加比特,扩大了可用随机标识的数量,并设计了一种异步接收机结构用于数据部分的多用户检测.分析和仿真结果表明,所提出的方法能大大降低碰撞概率.In order to decrease the random access latency and to lower the collision probability, an interleave division multiple access（IDMA） scheme is adopted as the multiple access scheme of resource request data part of the one-step random access scheme, The number of available random identifier will be enlarged when inserting several additional bits into the data part, An asynchronous IDMA receiver is designed for multi-user detection of the data part, Analysis and simulation results show that the collision probability can be lowered dramatically by using the proposed scheme,

关 键 词：随机接入信道 交织多址 异步接收机 碰撞概率 

分 类 号：TN911.23[电子电信—通信与信息系统]