| 离散多载波调制中信道的非均匀分割 |
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| 引用本文： | 曹雪虹,毕厚杰.离散多载波调制中信道的非均匀分割[J].南京邮电大学学报(自然科学版),2000,20(2):41-44. |
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| 作者姓名： | 曹雪虹 毕厚杰 |
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| 作者单位： | 南京邮电学院信息工程系,江苏南京,210003 |
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| 摘 要： | 离散多载波调制中需要将整个信道分成若干子信道。根据信道幅频特性的变化在不同频段有很大差异，提出了一种非均匀信道分割的方法，能使子信道数减少，子信道间能量的泄漏减少，子信道间的干扰相应减少，同时降低了调制时的计算复杂度。实验证明即使在比较少的子信道情况下，不影响系统的传输速率。
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| 关 键 词： | 多载波调制 子信道分割 比特分配 |
| 文章编号： | 1000-1972(2000)02-0041-04 |
| 修稿时间： | 1999-06-17 |
Nonuniform Subchannel Divided for Discrete Multicarrier Modulation |
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| CAO Xue-hong,BI Hou-jie.Nonuniform Subchannel Divided for Discrete Multicarrier Modulation[J].Journal of Nanjing University of Posts and Telecommunications,2000,20(2):41-44. |
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| Authors: | CAO Xue-hong BI Hou-jie |
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| Institution: | CAO Xue-hong
,BI Hou-jie
;(Departmetn of Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003,China) |
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| Abstract: | The conanunication channel needs to be divided into many subehannels for discrete multicarrier modulation. Because the amplitude frequency response of the channel varies from one frequency band to another, we present in this paper a method that divides the whole channel into nonuniform subehannels. This new scheme can reduce the nmnber of the subeharmels and the energy leakage between neighboring subchannels and the interference. Meanwhile the computational complexity of modulation is also reduced. Experiments show that the capacity of this communication system is not affected when only several subehannels are used. |
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| Keywords: | Multicarrier modulation Subchannel divided Bit loading algorithm |
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