[1]王红娟,仲伟志. 基于OFDM的卫星移动通信信道估计算法研究[J].计算机技术与发展,2014,24(09):37-40.
　WANG Hong-juan,ZHONG Wei-zhi. Study on Channel Estimation Algorithm in Mobile Satellite Communication Based on OFDM[J].,2014,24(09):37-40.
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 基于OFDM的卫星移动通信信道估计算法研究()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
24
期数:
2014年09期
页码:
37-40
栏目:
智能、算法、系统工程
出版日期:
2014-09-10

文章信息/Info

Title:
 Study on Channel Estimation Algorithm in Mobile Satellite Communication Based on OFDM
文章编号:
1673-629X（2014）09-0037-04
作者:
 王红娟; 仲伟志
 南京航空航天大学 航天学院
Author(s):
 WANG Hong-juan; ZHONG Wei-zhi
关键词:
 ; 卫星移动信道; 正交频分复用; 信道估计; 最小均方误差 知识脉络 SVD-MMSE
Keywords:
 ; mobile satellite channel; OFDM; channel estimation; MMSE SVD-MMSE
分类号:
TP391.9
文献标志码:
A
摘要:
 针对卫星移动信道的特点,结合正交频分复用( Orthogonal Frequency Division Multiplexing,OFDM)技术,在卫星移动信道模型基础上分析并讨论了三种典型的信道估计算法,即最小二乘( Least-Square,LS)估计算法、最小均方误差( Mini-mum Mean Square Error,MMSE)估计算法和奇异值分解( Singular Value Decomposition,SVD)算法。采用经典的抽头延迟线模型,对各算法进行仿真试验,得出不同算法下信道估计误比特曲线。理论分析和仿真实验表明,三种算法均能够有效地抑制卫星移动信道衰落产生的误码率,其中SVD-MMSE算法能够在降低MMSE算法复杂度的基础上,抑制噪声,提高信道估计精度。
Abstract:
 Aiming at the characteristics of the mobile satellite channel,combined with OFDM technology,analyze and discuss three typical channel estimation algorithm based on the mobile satellite channel model,namely Least Squares (LS),Minimum Mean Square Error ( MMSE) channel estimation algorithm and simplified Singular Value Decomposition ( SVD) channel estimation algorithm. Use the clas-sical tapped delay line model for simulation of all algorithms,obtaining the bit error curve under different channel estimation algorithms. As theoretical and simulation results proved that,the three algorithms are able to effectively suppress the BER of the mobile satellite chan-nel fading,among which SVD-MMSE algorithm has more advantage,it can reduce the complexity of MMSE algorithm and at the same time improve the channel estimation accuracy.

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更新日期/Last Update: 2015-04-01