| 基于大系统方法的上行CDMA蜂窝系统性能分析 |
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| 引用本文： | 虞 凯,范平志,郝 莉.基于大系统方法的上行CDMA蜂窝系统性能分析[J].通信学报,2011,32(1):20-26. |
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| 作者姓名： | 虞 凯 范平志 郝 莉 |
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| 作者单位： | 1. 中国中铁二院工程集团有限责任公司,通信信号设计研究院,四川,成都,610031;西南交通大学,信息编码与传输四川省重点实验室,四川,成都,610031
2. 西南交通大学,信息编码与传输四川省重点实验室,四川,成都,610031 |
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| 基金项目： | 国家自然科学基金资助项目(60872014); 国家高技术研究发展计划(“863”计划)基金资助项目(2009AA01Z238); 十一五重大专项(2009ZX03003-006)~~ |
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| 摘 要： | 结合大尺度和小尺度衰落,采用大系统分析方法对CDMA蜂窝系统上行链路的性能进行分析。首先分析了小区内多址干扰和小区间干扰的情况;其次推导出了通过匹配滤波器后的信干噪比值,该值只与小区负载、用户功率、信道增益有关;最后分析了系统的误码率、吞吐量和频谱效率,并通过仿真验证了分析的准确性。仿真结果发现,随着小区负载的增大,系统的误码率增大,吞吐量下降,但频谱效率有所提高。
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| 关 键 词： | CDMA 蜂窝 随机扩频 大系统 |
Performance analysis of uplink CDMA cellular systems based on the large system method |
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| YU Kai,FAN Ping-zhi,HAO Li.Performance analysis of uplink CDMA cellular systems based on the large system method[J].Journal on Communications,2011,32(1):20-26. |
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| Authors: | YU Kai FAN Ping-zhi HAO Li |
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| Affiliation: | YU Kai1,2,FAN Ping-zhi2,HAO Li2(1.Design & Research Institute of Signal & Communications,China Railway Eryuan Engineering Group Co.Ltd,Chengdu 610031,China,2.Provincial Key Lab of Information Coding & Transmission,Southwest Jiaotong University,China) |
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| Abstract: | The performance of uplink of CDMA cellular systems with large and small scale fading was investigated based on the large system analysis.The intra-cell multiple access interference was firstly analyzed as well as the inter-cell in-terference.Then the signal to interference and noise ratio was deduced,the result of which was only dependent on the cell load,user power and channel coefficient.Finally,the bit error rate,throughput and spectrum efficiency were analyzed,which were confirmed by simulations.The sim... |
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| Keywords: | CDMA cellular random spreading large system |
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