| 单载波系统迭代频域均衡技术及优化传输 |
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| 引用本文： | 李海涛,林孝康.单载波系统迭代频域均衡技术及优化传输[J].清华大学学报(自然科学版),2009(8). |
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| 作者姓名： | 李海涛 林孝康 |
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| 作者单位： | 清华大学电子工程系; |
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| 摘 要： | 针对码间干扰信道下的单载波通信系统,提出一种低复杂度、适用于任意高阶调制、基于线性最小均方误差准则的迭代频域均衡(FDE)算法,并引入信噪比-方差演进技术来预测迭代系统性能。基于信噪比-方差演进原理,对发射信号频谱进行整形优化,设计一种在频域可以快速实现的循环预编码。该预编码的引入既不增加循环前缀的所需长度,也不增加接收机端的均衡复杂度。仿真结果表明,循环预编码优化后系统所需的发射功率可以降低1~3 dB。
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| 关 键 词： | 无线通信 码间干扰 频域均衡（FDE） 信噪比-方差演进 循环预编码 |
Iterative FDE technique and transmission optimization for single-carrier systems |
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| LI Haitao,LIN Xiaokang.Iterative FDE technique and transmission optimization for single-carrier systems[J].Journal of Tsinghua University(Science and Technology),2009(8). |
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| Authors: | LI Haitao LIN Xiaokang |
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| Institution: | Department of Electronic Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | A low-complexity frequency domain equalization(FDE) technique based on the linear-minimum-mean-square-error principle was developed for single-carrier communication systems with any arbitrary higher-order modulation over inter-symbol interference(ISI) channels.A signal-to-noise ratio variance evolution technique was used to quickly and accurately evaluate the system performance.A circular precoder was developed based on this evolution technique to shape the spectrum of transmitted signals and optimize the s... |
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