| 非线性M-QAM信道的自适应预均衡 |
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| 引用本文： | S.Pupolill,A.Sarti,傅海阳. 非线性M-QAM信道的自适应预均衡[J]. 南京邮电大学学报(自然科学版), 1989, 0(2) |
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| 作者姓名： | S.Pupolill A.Sarti 傅海阳 |
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| 作者单位： | Padova Uni.Italy，Padova Uni.Italy，南京邮电学院无线电工程系 |
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| 摘 要： | 本文介绍一种数字式自适应预均衡器.它可以补偿高功率放大器在非线性区域工作时引入的具有记忆的3阶非线性失真.采用 Volterra 级数表示法分析这种非线性失真,并对高功率放大器参数进行自适应估值,从而完成预均衡网络和估值电路的设计.本文同时给出 M-QAM 系统的计算机模拟方法.模拟结果表明,这种预均衡器对系统的非线性失真有较好的校正作用.
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| 关 键 词： | 自适应均衡器 非线性信道 多电平正交调制 |
Adaptive Pre-Equalization in Non-Linear M-QAM Channels |
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| S.Pupolin A.Sarti. Adaptive Pre-Equalization in Non-Linear M-QAM Channels[J]. JJournal of Nanjing University of Posts and Telecommunications, 1989, 0(2) |
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| Authors: | S.Pupolin A.Sarti |
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| Affiliation: | S.Pupolin A.Sarti (Padova Uni.Italy)Fu Haiyang (Department of Radio Engineering) |
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| Abstract: | This paper presents a kind of adaptive digital pre-equali- zer,The pre-equalizer can make up for the memorized third order non-linear distortion caused by high power amplifier (HPA)working in non-linear domain.This third order non- linear distortion is studied by the Volterra series representation and the parameters of HPA are adaptive predicted.We fulfil the designs of pre-equalization networks and predication circuits. Then,a kind of adaptive digital pre-equalizer is obtained. This paper also gives the computer simulation method for M-QAM system.When the M-QAM system has or has not the pre-equalization,the results of computer simulation of the memo- rized non-linear M-QAM digital transmission system are given. It shows that this kind of adaptive digital pre-equalizer has better correction and compensation effect for systematic non- linear distortion. |
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| Keywords: | Adaptive equalizer Non-linear channels Multilevel-quadrature amplitude modulation(M-QAM) |
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