| 一种基于两级均衡的超Nyquist码元速率接收方案 |
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| 引用本文： | 屈冰峰,沈越泓,陈士周,黄丽波.一种基于两级均衡的超Nyquist码元速率接收方案[J].军事通信技术,2011(2):48-52. |
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| 作者姓名： | 屈冰峰 沈越泓 陈士周 黄丽波 |
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| 作者单位： | 解放军理工大学通信工程学院研究生4队;解放军理工大学通信工程学院无线通信系;中国人民解放军73683部队; |
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| 摘 要： | 1975年MAZO提出超Nyquist码元速率(FTN)理论,通过理论推导证明,信号在加性高斯白噪声信道下,以超过Nyquist码元速率25%以内的速率进行传输,误码性能可以不下降。但MAZO以及至今都没人能完成FTN的接收,因为当信号以超Nyquist码元速率进行传输所引起的码间串扰长度无限长,若要完全消除码间串扰,使用最大似然检测(MLSE)方法,其复杂度无穷大,是不可实现的。基于MMSE均衡和WCE均衡级联的两级均衡已证明在长码间串扰信道下其误码性能接近于MLSE。文章将两级均衡运用于FTN接收,仿真证明在加性高斯白噪声信道下,信号以超过Nyquist码元速率25%以内的速率进行传输,误码性能不下降。成功实现FTN的接收,验证了MAZO的理论。
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| 关 键 词： | 超奈奎斯特码元速率 码间串扰 两级均衡 最大似然序列检测 |
Realization Scheme Based on a Two-stage Equalization for the Fast than Nyquist Symbol Rate Transmission |
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| QU Bing-feng,SHEN Yue-hong,CHEN Shi-zhou,HUANG Li-bo.Realization Scheme Based on a Two-stage Equalization for the Fast than Nyquist Symbol Rate Transmission[J].Journal of Military Communications Technology,2011(2):48-52. |
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| Authors: | QU Bing-feng SHEN Yue-hong CHEN Shi-zhou HUANG Li-bo |
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| Institution: | QU Bing-feng1,SHEN Yue-hong2,CHEN Shi-zhou1,HUANG Li-bo3(1.Postgraduate Team 4 ICE,PLAUST,Nanjing 210007,China,2.Department of Radio Communication ICE,3.Unit 73683 of PLA,Ningbo 315020,China) |
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| Abstract: | In 1975 Mazo advanced Faster-than-Nyquist(FTN signaling) theory,pointing out that in the condition of the bandwidth limited of Additive White Gaussian Noise(AWGN) channel,if the symbol rate is faster than the Nyquist rate of 25%,the bit error rate of the system will not be affected,which can greatly improve the effectiveness of data transmission.However,neither MAZO nor anyone else has ever accomplished transmission with FTN as the length of the ISI caused by the system of FTN is infinite.If we want to comp... |
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| Keywords: | fast than Nyquist symbol rate ISI two-stage equalization MLSE |
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