| 调制方式在快变瑞利信道协作通信的性能分析 |
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| 引用本文： | 所明璇,张曙.调制方式在快变瑞利信道协作通信的性能分析[J].应用科技,2011,38(1):14-17,38. |
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| 作者姓名： | 所明璇 张曙 |
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| 作者单位： | 哈尔滨工程大学,信息与通信工程学院,黑龙江,哈尔滨,150001 |
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| 基金项目： | 国防科学技术工业委员会基础研究基金资助项目(40106030503) |
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| 摘 要： | 以误码率作为性能指标，讨论了快变瑞利信道下，4种调制方式与信道变化率、编码长度及信噪比的关系，经过推导总结为公式．研究采用单中继放大前传（amplify-and-forward，AF）协作分集对系统性能的影响．最后讨论了信道变化率与终端移动速度、载波频率的关系．仿真结果表明，相干调制适用于信道变化较慢的情况，而非相干FSK调制是快变信道下最优方式．各种调制方案引入协作分集后，性能都有较大提升．
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| 关 键 词： | 调制方式 协作通信 误码率 时变瑞利衰落信道 |
Performance analysis of four modulations with cooperative communication in fast time-varying rayleigh channel |
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| SUO Ming-xuan,ZHANG Shu.Performance analysis of four modulations with cooperative communication in fast time-varying rayleigh channel[J].Applied Science and Technology,2011,38(1):14-17,38. |
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| Authors: | SUO Ming-xuan ZHANG Shu |
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| Institution: | SUO Ming-xuan,ZHANG Shu(College of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China) |
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| Abstract: | The performance of four basic modulation schemes in a rapidly time-varying channel was investigated.After the theoretical analysis and derivation,the authors summarized the bit error rate formulas which present their relationship with the channel changing rate,coding length and SNR,and then studied the improvement in system performance when using cooperative diversity with single amplifying relay to combat Rayleigh fading,finally,the relationship between channel changing rate and the terminal moving speed a... |
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| Keywords: | modulation scheme cooperative communication BER time-varying Rayleigh fading channel |
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