| 用于认知无线电的自适应双模跳频OFDM系统 |
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| 引用本文： | 史其存,杨知行,彭克武.用于认知无线电的自适应双模跳频OFDM系统[J].无线电工程,2011,41(3):47-48,64. |
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| 作者姓名： | 史其存 杨知行 彭克武 |
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| 作者单位： | 清华大学,北京,100084 |
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| 摘 要： | 认知无线电感知的空闲频谱具有非连续、非均匀特性,对认知无线电物理层实现提出挑战。跳频正交频分复用技术(Orthogonal Frequency Division Multiplexing,OFDM)兼具跳频与OFDM二者优势,适用于宽带无线传输。提出一种自适应双模跳频OFDM系统,即把射频跳频OFDM与基带跳频OFDM相结合,根据频谱感知信息和基带处理能力自适应地在2种模式间切换,给出系统的设计规则和实现流程。分析表明该系统可提高非连续、非均匀空闲频谱的利用率,是一种可行的认知无线电物理层实现机制。
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| 关 键 词： | 认知无线电 跳频 正交频分复用 自适应 双模式 |
An Adaptive Dual-mode Frequency Hopping OFDM System for Cognitive Radio |
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| SHI Qi-cun,YANG Zhi-xing,PENG Ke-wu.An Adaptive Dual-mode Frequency Hopping OFDM System for Cognitive Radio[J].Radio Engineering of China,2011,41(3):47-48,64. |
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| Authors: | SHI Qi-cun YANG Zhi-xing PENG Ke-wu |
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| Affiliation: | SHI Qi-cun,YANG Zhi-xing,PENG Ke-wu(Tsinghua National Laboratory for Information Science and Technology,Beijing 100084,China) |
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| Abstract: | The idle spectrum sensed by cognitive radio is always discontinuous and non-uniform,it is a real challenge for cognitive radio physical realization.Frequency hopping OFDM has the advantages of both frequency hopping and OFDM,and is used in wideband wireless transmission.An adaptive dual-mode frequency hopping OFDM system,which combines RF-FH-OFDM and BB-FH-OFDM,has been proposed.Switches are carried out adaptively between the two modes based on the spectrum sensing information and the capability of baseband... |
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| Keywords: | cognitive radio frequency hopping OFDM adaptive dual-mode |
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