| 嵌入式空频块编码 |
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| 引用本文： | 石俊峰,张天魁,曾志民. 嵌入式空频块编码[J]. 北京邮电大学学报, 2011, 34(Z1): 27-30 |
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| 作者姓名： | 石俊峰 张天魁 曾志民 |
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| 作者单位： | 北京邮电大学信息与通信工程学院; |
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| 基金项目： | 国家自然科学基金项目(60902047); 中央高校基本科研业务费专项资金项目 |
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| 摘 要： | 将空频块编码与嵌入式编码思想相结合，提出了一种新的嵌入式空频编码. 待传输的信息被分为基本流（高分集）和加强流（低分集），在信道质量较差的情况下，用户只能收到基本信息流，保证了用户的基本业务传输. 当信道质量较好时，用户可同时收到基本流和加强流信息，提高了业务传输质量. 同时，针对2发射天线的嵌入式空频编码，得出了其峰均比表达式. 仿真结果显示，在较低信噪比区域，嵌入式空频编码比传统的Alamouti空频编码具有更高的分集增益. 同时，在多普勒频移较大的情况下，相对于2发射天线的机会主义空时块编码，新提出的编码方法具有更好的误比特性能.
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| 关 键 词： | 嵌入式编码 空频块编码 空时块编码 |
Embedded Space-Frequency Block Codes |
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| SHI Jun-feng,ZHANG Tian-kui,ZENG Zhi-min. Embedded Space-Frequency Block Codes[J]. Journal of Beijing University of Posts and Telecommunications, 2011, 34(Z1): 27-30 |
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| Authors: | SHI Jun-feng ZHANG Tian-kui ZENG Zhi-min |
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| Affiliation: | SHI Jun-feng,ZHANG Tian-kui,ZENG Zhi-min (School of Information and Communication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China) |
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| Abstract: | Trade-off between diversity and rate in space frequency block codes(SFBC) is adopted,and embedded SFBC is proposed.The information is divided into the based stream and the enhanced stream.The based stream is received in bad channel,but the based and enhanced are received simultaneity in good channel.The transmission rate can be improved,and it is ensure that the based information stream is received reliably.Meanwhile,the peak average ratio formulation of our proposed codes is derived in two transmission ant... |
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| Keywords: | embedded codes space frequency block codes space time block codes |
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