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论文:2013,Vol:31,Issue(6):940-946 |
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引用本文： |
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左晓亚, 王顶, 姚如贵. 基于直接序列扩频和频域均衡的满多径分集块传输系统[J]. 西北工业大学 |
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Zuo Xiaoya, Wang Ding, Yao Rugui. Exploring Full Multipath Diversity Block Transmission System Based on Direct Sequence Spreading and Frequency Domain Equalization[J]. Northwestern polytechnical university |
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| 基于直接序列扩频和频域均衡的满多径分集块传输系统 |
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| 左晓亚, 王顶, 姚如贵 |
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| 西北工业大学 电子信息学院, 陕西 西安 710072 |
| 摘要: |
| 为了获得信道的满多径分集增益,基于直接序列扩频和线性频域均衡,提出了一种单载波块传输系统。发射信号在时域的直接序列扩频,造成了信号在频域的重复和交织。接收端通过最大比合并频域均衡,均衡和解扩同时在频域内完成。理论分析表明,对于多径数目为L的多径信道,系统可以获得分集阶数为L的满多径分集增益。与传统的线性频域均衡系统相比,系统具有更低的误码率和更低的计算复杂度。理论分析的结果通过计算机仿真进行了验证。 |
| 关键词:
误码率
计算复杂度
多径衰落
信号接收机
块传输系统
频域均衡
直接序列扩频
满多径分集
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| Exploring Full Multipath Diversity Block Transmission System Based on Direct Sequence Spreading and Frequency Domain Equalization |
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| Zuo Xiaoya, Wang Ding, Yao Rugui |
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| Department of Electronics Engineering, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| If the signal receiver simply relies on linear equalization, itis difficult for the block transmission system to obtain the full multipath diversity gains of the wireless channel.To achieve this, we propose a single carrier block transmission system based on direct sequence spreading and maximum ratio combination frequency domain equaliza -tion.The direct sequence spreading of transmission signals in the time domain results in signal repetition and inter -leaving in the frequency domain.Through maximal ratio combination frequency domain equalization, the despreading and equalization are carried out simultaneously in the frequency domain.The simulation results, given in Figs.2, 3 and 4, and their analysis show preliminarily that:(1) the block transmission system we proposed can obtain full multipath diversity gains (2) it has lower computational complexity and bit error rate than the conven-tional linear frequency domain equalizer. |
| Key words:
bit error rate
computational complexity
mutipath fading
signal receivers
block transmission system
frequency domain equalization
direct sequence spreading
full multipath diversity
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| 收稿日期: 2013-03-12
修回日期:
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| DOI: |
| 基金项目: 西北工业大学基础研究基金(JC20110223);陕西省自然科学基金(2013JQ8019)资助 |
| 通讯作者:
Email： |
| 作者简介: 左晓亚(1982-),西北工业大学讲师,主要从事宽带无线通信技术的研究。
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| 作者相关文章 |
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| 左晓亚 在本刊中的所有文章 |
| 王顶 在本刊中的所有文章 |
| 姚如贵 在本刊中的所有文章 |
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