基于广义地址码的RFID防碰撞算法  

An Anti-Collision Algorithm on New Spreading Code in RFID

作　　者：李泽兰[1] 何怡刚[1] 刘拓晟[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《计算机测量与控制》2010年第5期1114-1117,共4页Computer Measurement &Control

基　　金：国家自然科学基金项目(50677014;60876022);高校博士点基金(20060532002);国家863计划(No.2006AA04A104);湖南省科技计划项目资助(2008Gk2022)

摘　　要：提出了一种基于CDMA的广义地址码(GLS码)的防碰撞算法即CA-ALOHA算法,推导出了算法在信道传输中稳定的条件,并构造了相应的数学模型;这种新型算法选用新型扩频码即广义地址码(GLS),成功地屏蔽了信道中的多址干扰,将原有的ALO-HA一维多址划分拓展为时频上的二维划分,用逻辑信道代替了实际信道,突破了以往信道划分的局限;仿真结果表明在同等条件下,采用GLS码的信道误码性能优于传统的Walsh码(扩频码),且CA-ALOHA算法的系统吞吐量明显优于ALOHA算法和二进制算法。A novel anti--collision algorithm on Code Division Multiple Access is presented, deducing the stable condition of algorithm transported in the channels, and constructing relevant mathematic model. This new algorithm chooses novel spreading code, shielding MAI in the channel successfully, expand one--dimension multiple access division of original ALHOA to two--dimension on time-frequency division, logical channels replace of real channels, which break the limitations of the channel division, existing before. The simulation indicates： under the same conditions, using GLS code in channel, the error rate of using GLS code channel performances better than traditional Walsh code under the same condition, and throughput of system of CA--ALOHA algorithm obviously precedes ALOHA and binary algorithm.

关 键 词：GLS 码分多址 CA—ALOHA 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]