| 应答式ALOHA-CDMA信道的吞吐量及稳定性分析(英文) |
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| 引用本文： | 邵建华,殷奎喜,赵华.应答式ALOHA-CDMA信道的吞吐量及稳定性分析(英文)[J].东南大学学报,2009,25(2):156-160. |
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| 作者姓名： | 邵建华 殷奎喜 赵华 |
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| 作者单位： | 南京师范大学江苏省光电技术重点实验室,南京,210097 |
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| 基金项目： | The Key Laboratory Foundation of Geographical Information Science of Jiangsu Province (No.JK20050304); the Key Laboratory Foundation of Virtual Geographical Environments of Ministry of Education(No.NS206005) |
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| 摘 要： | 为了简化时隙ALOHA-CDMA系统的时间同步设备,提出了一种可用于卫星VSAT网络内向信道的应答式时隙ALOHA-CDMA信道模型.将端站分为M个子系统,利用主站发出周期性询问信号,建立了信道模型;通过扩频多址干扰(MAI)和分组检测概率的推导,计算出该信道的稳态吞吐量;并将扩散过程理论用于该信道的稳定性分析,得到扩散系数a(r)、漂移系数b(r)和信道平稳分布P(r).仿真结果表明,该系统可以显著提高信道吞吐性能和信道利用率,且存在1～2个稳定平衡点.应答式时隙ALOHA-CDMA信道可以降低卫星VSAT系统及分组无线网络系统的组网成本.
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| 关 键 词： | 吞吐量 稳定性 应答式时隙ALOHA-CDMA |
Analysis of throughput and stability for ACK-ALOHA-CDMA channel |
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| Shao Jianhua Yin Kuixi Zhao Hua.Analysis of throughput and stability for ACK-ALOHA-CDMA channel[J].Journal of Southeast University(English Edition),2009,25(2):156-160. |
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| Authors: | Shao Jianhua Yin Kuixi Zhao Hua |
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| Institution: | Shao Jianhua Yin Kuixi Zhao Hua(Optoelectronics Key Laboratory of Jiangsu Province,Nanjing Normal University,Nanjing 210097,China) |
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| Abstract: | A new acknowledgment-type slotted-ALOHA code division multiple access(ACK-ALOHA-CDMA)channel which can be used in the inbound channels of very small aperture terminal(VSAT)networks is proposed in order to simplify the synchronization equipment of networks in the slotted-ALOHA-CDMA systems.By dividing all VSAT stations into M subsystems and sending out periodic inquiry signals from the Hub station to the VSAT station,the channel model is established.By the means of deriving multi-access interference(MAI)and ... |
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| Keywords: | throughput stability ACK-ALOHA-CDMA |
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