准时隙ALOHA-CDMA信道的检测概率  

Detecting Probability of Acknowledgment-type Slotted-ALOHA-CDMA Channels

作　　者：邵建华[1] 殷奎喜[1] 王兴和[1] 赵华[1] 

机构地区：[1]南京师范大学物理科学与技术学院,江苏南京210097

出　　处：《南京师大学报（自然科学版）》2008年第3期54-58,共5页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：教育部重点实验室基金(NS206005);江苏省重点实验室开放基金(JK20050304)资助项目

摘　　要：提出了一种准时隙ALOHA-CDMA信道,作者将其称之为应答式ALOHA-CDMA信道,给出了这种信道的模型,推导了在子系统内部由于碰撞冲突对传输性能的影响,给出了这种准时隙ALOHA-CDMA信道的检测概率.结果表明:这种系统不但可以简化设备,还可以显著提高网络的接收机检测概率和信道利用率,对于卫星VSAT系统、地面分组无线网络等具有实用价值.A kind of acknowledgment-type Slotted-ALOHA-CDMA channel, which is called ACK-ALOHA-CDMA chan- nel by the auther, is studied in this paper. The channel model is given firstly. Then the interference between subsystems is obtained and the transmission influence in subsystems is discussed. Finally, detecting probability is obtained. Simulation results show that a significant performance improvement can be gained by using acknowledgment-type Slotted-ALO- HA-CDMA channel in satellite VSAT systems and radio packed networks with low complexity and high-bandwidth efficlency.

关 键 词：ALOHA 扩频多址 检测概率 

分 类 号：TN914.5[电子电信—通信与信息系统]