| 已知可变符号构成的保护间隔在单载波/多载波通信系统中的应用 |
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| 引用本文： | 李玮,程时昕,陈明.已知可变符号构成的保护间隔在单载波/多载波通信系统中的应用[J].东南大学学报,2006,22(1):11-15. |
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| 作者姓名： | 李玮 程时昕 陈明 |
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| 作者单位： | 东南大学移动通信国家重点实验室 南京210096 |
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| 摘 要： | 为了提高插入了保护间隔的无线通信系统的传输带宽利用效率,提出了一种可以用作时域信道估计的特殊保护间隔实现方式.所提出的保护间隔信号由已知可变符号序列构成,通过插入此种特殊的保护间隔,接收机可以实现低复杂度的时域信道估计,从而节省了原本传输导频信号的带宽,也因此提高了系统的带宽利用率.为了在新的系统中继续使用单抽头的频域均衡器,还给出了一种循环卷积恢复的方法用于重建信号和信道之间的循环卷积关系.仿真结果证明,该方案能取得良好的性能.
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| 关 键 词： | 循环前缀 补零方式保护间隔 固定符号保护间隔 信道估计 |
| 收稿时间： | 03 24 2005 12:00AM |
Different known intervals for single/multi-carrier transceiver |
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| Li Wei,Cheng Shixin,Chen Ming.Different known intervals for single/multi-carrier transceiver[J].Journal of Southeast University(English Edition),2006,22(1):11-15. |
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| Authors: | Li Wei Cheng Shixin Chen Ming |
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| Institution: | National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China |
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| Abstract: | To enhance the bandwidth efficiency of the guard interval (GI) assisted wireless communication system, an attractive scheme is proposed,which combines the functions of pilots and the GI together,so that the pilot resource used for estimating channel state is saved.Based on the proposed different known guard intervals (DKGI),the time-domain channel estimation can be simply applied on the receiver side.After channel estimation,the receiver can employ the cyclic convolution restoring (CCR) function to reconstruct the cyclical convolution relationship between the signal and the channel,by which the receiver can also achieve good performance through the conventional 1-tap frequency domain equalization (FDE). |
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| Keywords: | cyclic prefix zero padding fixed symbol padding channel estimation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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