| 引用本文: | 陈青,孙海信,齐洁,顾亚平,王华奎.加权分数傅里叶变换在混合系统中的应用[J].哈尔滨工业大学学报,2016,48(5):100.DOI:10.11918/j.issn.0367-6234.2016.05.016 |
| CHEN Qing,SUN Haixin,QI Jie,GU Yaping,WANG Huakui.Application of weighted fractional Fourier transform in hybrid system[J].Journal of Harbin Institute of Technology,2016,48(5):100.DOI:10.11918/j.issn.0367-6234.2016.05.016 |
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| 加权分数傅里叶变换在混合系统中的应用 |
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陈青1, 孙海信1, 齐洁1, 顾亚平2, 王华奎3
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(1. 水声通信与海洋信息技术教育部重点实验室(厦门大学), 361005 福建 厦门; 2. 中国科学院声学研究所, 100190 北京; 3. 水声对抗重点实验室(91388部队), 524022 广东 湛江)
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| 摘要: |
| 为提高通信系统在复杂水声环境下的鲁棒性，提出基于加权分数傅里叶变换WFRFT（weighted fractional Fourier trans-form）的混合载波系统.对混合系统进行优化设计，以最低误比特率为优化目标，求解得到系统的最优变换阶次，得到优化的系统性能.仿真和水池实验表明，基于WFRFT的混合载波系统在多径信道下的误比特率介于传统的单/多载波系统之间；而在双选信道下，其最优阶的系统性能优于单/多载波系统.该混合系统具有单/多载波的优良性能，在提高通信系统鲁棒性方面，具有很大的应用前景.
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| 关键词: 加权分数傅里叶变换 混合载波系统 水声环境 最优阶 |
| DOI：10.11918/j.issn.0367-6234.2016.05.016 |
| 分类号:TN914 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(61471309); 福建省自然科学基金(2013J01258). |
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| Application of weighted fractional Fourier transform in hybrid system |
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CHEN Qing1, SUN Haixin1, QI Jie1, GU Yaping2, WANG Huakui3
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(1. Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, Ministry of Education, School of Information Science and Engineering, Xiamen University, 361005 Xiamen, Fujian, China; 2. Institute of Acoustics, Chinese Academy of Sciences, 100190 Beijing, China; 3. Science and Technology on Underwater Acoustic Antagonizing Laboratory, No.91388 Unit of PLA, 524022 Zhanjiang, Guangdong, China)
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| Abstract: |
| To improve the robustness of the communication system in complex underwater acoustic environment, the hybrid carrier system based on WFRFT was put forward. To obtain the optimal transformation order, the hybrid carrier system is designed with the lowest bit error rate as optimization goal. Simulation results show that BER performance of hybrid carrier system is between the traditional single/multi carrier systems in multipath channels. However, system performances with the optimal order are superior to single/multi carrier systems under the doubly selective fading channels. It has the excellent characteristics of the single/multi carrier systems and it is thus prospective in improving the robustness of the communication system.
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| Key words: weighted fractional Fourier transform hybrid carrier system underwater acoustic environment optimal order |
