| Nakagami衰落信道上MIMO WCDMA系统的MQAM性能分析 |
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| 引用本文： | 徐福永,李光球.Nakagami衰落信道上MIMO WCDMA系统的MQAM性能分析[J].无线通信技术,2005,14(2):1-4,10. |
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| 作者姓名： | 徐福永 李光球 |
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| 作者单位： | 杭州电子科技大学通信工程学院,杭州,310018 |
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| 基金项目： | 教育部《高等学校骨干教师资助计划》资助项目。 |
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| 摘 要： | 日益增长的无线业务需求要求提高衰落信道上无线通信的频谱利用率。本文利用Q2(x)的另一种数学表达式和矩生成函数推导了Nakagami-m衰落信道上多输入多输出(MI-MO)WCDMA系统采用M进制正交幅度调制(MQAM)的平均误符号率(ASER)表达式,分析框架可以推广到开环和闭环系统发射和接收天线为任意数目的应用场合,研究了存在多址干扰下MIMOWCDMA系统的平均误符号率性能,数值计算结果表明组合发送分集和接收分集可以显著改善系统的性能。
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| 关 键 词： | 多输入多输出系统 正交幅度调制 多址干扰 开环最大比合并 闭环最大比合并 |
| 文章编号： | 1003-8329(2005)02-0001-04 |
| 修稿时间： | 2004年12月7日 |
Performance Analysis of MQAM for MIMO WCDMA Systems in Nakagami Fading Channels |
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| XU Fu-yong,LI Guang-qiu.Performance Analysis of MQAM for MIMO WCDMA Systems in Nakagami Fading Channels[J].Wireless Communication Technology,2005,14(2):1-4,10. |
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| Authors: | XU Fu-yong LI Guang-qiu |
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| Abstract: | The growing demand for wireless services has created the need for improving the spectral efficiency of wireless communications over fading channels. The expression of average symbol error rate(ASER) of MQAM for Multiple-input-multiple-output(MIMO) WCDMA systems in Nakagami-m fading channels is derived by the moment generating function(MGF) and alternative representation of Q 2(x). The analytical framework developed can handle an arbitrary number of transmit and receive antennas in both open loop and close loop systems,as well as the study on the ASER performance of MIMO WCDMA systems under the condition of multiple access interference. Numerical results show the system can achieve performance improved by combined transmit and receive antenna diversity. |
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| Keywords: | multiple-input-multiple-output systems quadrature amplitude modulation multiple access interference(MAI) open loop maximum-ratio combining close loop maximum-ratio combining |
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