| 上行信道中QPSK调制技术的研究 |
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| 引用本文： | 姜萍,花汉兵,王建新.上行信道中QPSK调制技术的研究[J].中国有线电视,2007(12):1146-1149. |
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| 作者姓名： | 姜萍 花汉兵 王建新 |
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| 作者单位： | 南京理工大学,江苏,南京,210094 |
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| 摘 要： | 根据HFC网络上行信道的特性,建立了信道模型;分析了上行信道中存在的各种噪声对QPSK调制技术的影响。结果表明在C/N（传输信道载噪比）较低的情况下,采用QPSK调制方式,可以提高系统的抗干扰能力。
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| 关 键 词： | 光纤同轴电缆混合网 上行信道 噪声 |
| 文章编号： | 1007-7022（2007）12-1146-04 |
| 收稿时间： | 2007-04-12 |
| 修稿时间： | 2007-04-12 |
Study on QPSK Modulation Techniques in Upstream Channel of HFC-CATV Networks |
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| JIANG Ping,HUA Han-bing,WANG Jian-xin.Study on QPSK Modulation Techniques in Upstream Channel of HFC-CATV Networks[J].China Cable Television,2007(12):1146-1149. |
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| Authors: | JIANG Ping HUA Han-bing WANG Jian-xin |
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| Abstract: | This paper establishes the channel model according to the properties of the upstream channel of HFC networks. It also studies how various noises in the upstream channel of HFC networks effects the modulation techniques of QPSK. It is demonstrated that when C/N is low, the anti-jamming ability of the system can be improved if QPSK is adopted. |
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| Keywords: | QPSK |
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