一种新的基于特征序列的随机接入机制  

A New Random Access (RACH) Mechanism Based on Characteristics Sequences

作　　者：任斌[1] 别志松[1] 吴文礼[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《通信技术》2009年第1期219-221,共3页Communications Technology

摘　　要：文章设计了一种新的基于特征序列的随机接入机制以完成随机接入过程,通过在资源请求数据段加入若干子标识比特,扩大了可用随机标识的数量,并采用了复杂度较低的单用户接收机结构用于数据部分的检测。分析和仿真证明,该机制能够有效地降低碰撞概率,提高终端正确接入率。In this paper, a new random access （RACH） mechanism based on characteristics sequences is proposed to complete the process of random access. The number of available random identifier can be enlarged when several additional bits is inserted into the resource request data part. The single-user receiver structure of low complexity is used for the detection of data structure. Analysis and simulation show that the probability of collisions can be effectively ：reduced and rate of the correct terminal access improved by the proposed mechanism.

关 键 词：随机接入信道 特征序列 碰撞概率 混合扩频码 

分 类 号：TN929.5[电子电信—通信与信息系统]