OFDM系统中优化的泛化复指数基扩展模型

doi:10.3969/j.issn.1001-2400.2012.03.021

J4 ›› 2012, Vol. 39 ›› Issue (3): 131-135.doi: 10.3969/j.issn.1001-2400.2012.03.021

OFDM系统中优化的泛化复指数基扩展模型

张钦娟;武穆清;郭起霖;张瑞

(北京邮电大学宽带通信网络实验室，北京 100876)

收稿日期:2011-04-14 出版日期:2012-06-20 发布日期:2012-07-03
通讯作者: 张钦娟
作者简介:张钦娟(1986-)，女，北京邮电大学博士研究生，E-mail: zhangqinjuan@bupt.edu.cn．
基金资助:
国家重大专项资助项目(2011ZX03001-007-03);北京市自然科学基金资助项目(4102043)

Optimized generalized complex exponential basis expansion in the OFDM system

ZHANG Qinjuan;WU Muqing;GUO Qilin;ZHANG Rui

(Broadband Communication Network Lab., Beijing Univ. of Posts and Telecommunications, Beijing 100876， China)

Received:2011-04-14 Online:2012-06-20 Published:2012-07-03
Contact: ZHANG Qinjuan

摘要/Abstract

摘要：

对正交频分复用系统中时间选择性信道的估计模型——泛化复指数基扩展模型(GCE-BEM)进行优化，根据多普勒频移的估计情况，提出了可以进行自适应系数调整的模型，通过选择固定系数或变化系数的GCE-BEM，在不增加计算复杂度的前提下能有效消除GCE-BEM模型的高频噪声的影响，可以减小信道的估计误差，提高了系统性能．

关键词: 正交频分复用, 信道估计, 时间选择性信道, 基扩展模型

Abstract:

In wireless communication systems, high-speed mobile terminals induce the channel to be time selective. In this paper, the generalized complex exponential basis expansion model (GCE-BEM) is optimized for the time selective channel of the orthogonal frequency division multiplexing system. The proposed model can adapt the model coefficient according to the Doppler frequency estimation situation, becoming the GCE-BEM with a fixed or varying coefficient. It can effectively eliminate high-frequency noise without increasing the computational complexity, reduce the model error, and improve the system performance.

Key words: OFDM, channel estimation, time selective channel, basis expansion model

张钦娟;武穆清;郭起霖;张瑞. OFDM系统中优化的泛化复指数基扩展模型[J]. J4, 2012, 39(3): 131-135.

ZHANG Qinjuan;WU Muqing;GUO Qilin;ZHANG Rui. Optimized generalized complex exponential basis expansion in the OFDM system[J]. J4, 2012, 39(3): 131-135.

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OFDM系统中优化的泛化复指数基扩展模型

Optimized generalized complex exponential basis expansion in the OFDM system

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