| 一种新的克服多普勒频移的分集算法 |
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| 引用本文： | 吴风丽,邹卫霞,李斌,张文硕.一种新的克服多普勒频移的分集算法[J].无线电工程,2010,40(1):40-43. |
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| 作者姓名： | 吴风丽 邹卫霞 李斌 张文硕 |
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| 作者单位： | 1. 济南铁道职业技术学院,山东,济南,250104
2. 北京邮电大学,无线网络实验室,北京100876 |
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| 基金项目： | 教育部高等学校博士学科点专项科研基金 |
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| 摘 要： | 多普勒频移或其他原因产生的同步误差严重影响OFDM系统性能。提出了以子载波间干扰(ICI)引起的损失信噪比作为目标函数,进而对多普勒分集接收机进行联合优化;利用泰勒级数简化目标函数,降低了算法实现复杂度;在获得最大多普勒频移估计的条件下,获到支路频移与合并系数的联合优化解。仿真表明,采用LS信道估计的情况下,算法性能可逼近MMSE分集算法。
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| 关 键 词： | OFDM 多普勒频移 分集接收 联合优化 |
A Novel Optimum Algorithm to Overcome Doppler Frequency Shift in OFDM |
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| WU Feng-li,ZOU Wei-xia,LI Bin,ZHANG Wen-shuo.A Novel Optimum Algorithm to Overcome Doppler Frequency Shift in OFDM[J].Radio Engineering of China,2010,40(1):40-43. |
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| Authors: | WU Feng-li ZOU Wei-xia LI Bin ZHANG Wen-shuo |
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| Affiliation: | WU Feng-li1,ZOU Wei-xia2,LI Bin2,ZHANG Wen-shuo2 (1.Ji\'nan Railway Institute of Technology,Ji\'nan Sh,ong 250104,China,2.Wireless Network Lab,Beijing University of Posts , Telecommunications,Beijing 100876,China) |
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| Abstract: | Intercarrier interference (ICI) caused by Doppler frequency shift or other reasons can deteriorate the performance of OFDM.To overcome the influence of Doppler frequency shift in OFDM system,the lost signal-to-interference ratio (SIR) caused by ICI was chosen as the optimum objective function.The joint optimum was performed on Doppler Diversity Receiver.Then the objective function was simplified using Taylor serial expanding.This joint optimum function was resolved by using the estimated maximal Doppler fre... |
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| Keywords: | OFDM |
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