| 空时分组码在CDMA下行链路应用的研究 |
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| 引用本文： | 赵琰,何晨. 空时分组码在CDMA下行链路应用的研究[J]. 信息技术, 2005, 29(5): 24-28 |
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| 作者姓名： | 赵琰 何晨 |
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| 作者单位： | 1. 上海电力学院电子信息工程系,上海,200090
2. 上海交通大学电子工程系,上海,200030 |
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| 摘 要： | 提出了准正交空时分组码在CDMA系统下行链路的两种应用方法，一种是在发射端对用户信号先扩频后空时编码送至发射天线，另一种是先空时编码后扩频送至发射天线，相应给出了两种方法接收端的译码方法。数据仿真结果表明在CDMA系统下行链路的应用时，准正交空时分组码的误码率低于正交空时分组码的误码率，并且第一种方法的误码率低于第二种方法的误码率。
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| 关 键 词： | 空时编码 准正交 CDMA |
| 文章编号： | 1009-2552(2005)05-0024-04 |
| 修稿时间： | 2004-10-11 |
Research on application of quasi - orthogonal space- time block codes in downlink CDMA system |
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| ZHAO Yan,HE Chen. Research on application of quasi - orthogonal space- time block codes in downlink CDMA system[J]. Information Technology, 2005, 29(5): 24-28 |
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| Authors: | ZHAO Yan HE Chen |
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| Affiliation: | ZHAO Yan~1,HE Chen~2 |
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| Abstract: | In this paper, we present two applications of quasi-orthogonal space-time block code in downlink CDMA system. In the first method, the user data is coded by space-time coder after spreading, then is transmitted by the transmit antennae. In the second method, the user data is spread after a space-time coder, and is transmitted by the transmit antennae. And the decoding algorithms of the two methods are given correspondingly. From the simulation results, it can be found that the BER of quasi-orthogonal space-time block codes is lower than that of orthogonal space-time block codes in downlink CDMA system. And the BER of the first method is lower than what of the second method. |
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| Keywords: | space-time coding quasi-orthogonal code-division multiple-access |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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