| 频率选择性衰落无线信道下的发送分集技术 |
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| 引用本文： | 唐秋玲,覃团发,张淑仪.频率选择性衰落无线信道下的发送分集技术[J].南京大学学报(自然科学版),2004,40(4):454-461. |
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| 作者姓名： | 唐秋玲 覃团发 张淑仪 |
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| 作者单位： | [1]南京大学近代声学国家重点实验室南京210093 [2]广西大学计算机与电子信息学院南宁530004 |
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| 基金项目： | 广西教育厅资助科研项目 (桂教科研【2 0 0 2】316号 ) |
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| 摘 要： | 通过研究平坦衰落信道下空时分组码(STBC)发送分集技术，结合正交频分复用(OFDM)技术，提出适用于频率选择性衰落信道的STBC-OFDM发送分集方法．然后对STBC-OFDM系统在随机信道和恒参信道中的性能进行仿真．研究和仿真结果表明，STBC-OFDM技术是一种非常有效的抗频率选择性随机衰落技术．与OFDM系统比较，STBC-OFDM系统误码性能得到很大改善，系统的频带利用率通过采用多电平调制方式得到提高．STDC-OFDM方法适用于数据高速传输的宽带无线系统的下行链路．
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| 关 键 词： | 发送分集 空时分组码 正交频分复用 频率选择性衰落 |
Transmit Diversity Scheme in the Wireless Channel of Frequency-Selective Fading |
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| Tang Qiu-Ling ,Qin Tuan-Fa ,Zhang Shu-Yi.Transmit Diversity Scheme in the Wireless Channel of Frequency-Selective Fading[J].Journal of Nanjing University: Nat Sci Ed,2004,40(4):454-461. |
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| Authors: | Tang Qiu-Ling Qin Tuan-Fa Zhang Shu-Yi |
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| Institution: | Tang Qiu-Ling 1,2,Qin Tuan-Fa 1,2,Zhang Shu-Yi 1 |
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| Abstract: | The transmit diversity technology with space-time block coding(STBC)is investigated and generalized to wireless channels of frequency-selective fading from flat fading combined with orthogonal frequency division multiplexing(OFDM)technologies.Then the STBC-OFDM system is simulated in a random channel and a definite channerespetively.The results of simulation show that STBC-OFDM is a highly effective technology for combating frequency-selective random fading.Compared with the OFDM system,the capacity and the performance of the STBC-OFDM system are improved and its spectrum availability increases by exploiting multi- level modulation.The STBC-OFDM technology can be applied to the down-link of wideband wireless network with high data rate. |
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| Keywords: | transmit diversity STDC OFDM frequency-selective fading |
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