| 宽带码分多址系统中正交码的分配策略研究 |
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| 引用本文： | 程江,朱世华,党安红. 宽带码分多址系统中正交码的分配策略研究[J]. 西安交通大学学报, 2001, 35(6): 581-585 |
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| 作者姓名： | 程江 朱世华 党安红 |
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| 作者单位： | 西安交通大学电子与信息工程学院，西安 710049 |
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| 基金项目： | 国家自然科学基金资助项目(69672017)；教育部博士点基金资助项目(PZ007)． |
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| 摘 要： | 对宽事码分多址（WCDMA）蜂窝移动通信系统中下行链路的正交可变扩频因子（OVSF）码字分配问题进行了建模分析，提出采用代价函数来描述码字间干扰和容量性能，并基于代价函数制定了OVSF码字分配的方案，给出了该分配方案的理论性能计算方法，对随机分配方法和基于代价函数的分配方法进行了系统仿真，仿真结果表明：代价函数分配方法在不同话务量的情况下，都较随机分配方法明显降低了阻塞率，有效提高了系统容量。
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| 关 键 词： | 正交可变扩频因子 宽带码分多址 信道动态分配 蜂窝系统 移动通信 |
| 文章编号： | 0253－987X（2001）06-0581-05 |
| 修稿时间： | 2000-09-12 |
Study on DynamicOrthogonal Codes Assignment in Wideband Code Division Multiple Access CommunicationSystems |
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| Cheng Jiang,Zhu Shihua,Dang Anhong. Study on DynamicOrthogonal Codes Assignment in Wideband Code Division Multiple Access CommunicationSystems[J]. Journal of Xi'an Jiaotong University, 2001, 35(6): 581-585 |
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| Authors: | Cheng Jiang Zhu Shihua Dang Anhong |
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| Affiliation: | Cheng Jiang,Zhu Shihua,Dang Anhong [WT6BZ] |
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| Abstract: | The modeling and analysis of orthogonal variable spreading factor (OVSF) codes assignment in wideband code division multiple access (WCDMA) cellular communication systems are presented. An efficient code assignment scheme based on the cost function, which evaluates both the total interference caused by code assignment and the system capacity, is proposed. The theoretic performance of this scheme is derived. The system simulation shows that the scheme is more efficient in lowering blocking probability and increasing capacity than random code selection scheme in different traffic conditions. |
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| Keywords: | OVSF WCDMA dymamic channel assignment cellular system mobile communication |
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