电子科技大学学报2009，Vol.38Issue(1)：25-27,31,4.
导频符号调制方式对OFDM信道估计的影响
The Influence on OFDM Channel Estimation by Modulations of Pilot Symbol
摘要
Abstract
A frequency-domain channel estimation (CE) scheme for orthogonal frequency division multiplexing (OFDM) channel estimation which is based on a linear transformation is developed. The transmitted signal can be recovered efficiently by a linear transformation of the received signal. Firstly, two results on the generalized rotation matrix are deduced. Then based on the modulations of pilot symbols BPSK or QPSK, we achieve two channel estimation algorithms respectively. Simulations are performed at the condition that the channel is assumed to be Rayleigh fading and flat within one frame. Simulation results show that the BER and PER performance can be improved obviously when in-phase channel and quadrature-phase channel of each sub-carrier are inserted in the pilot symbols.关键词
信道估计/正交频分复用/Rayleigh衰落信道/旋转矩阵Key words
channel estimation/OFDM/Rayleigh fading channel/rotation matrix分类
信息技术与安全科学引用本文复制引用
李明奇,李玉柏,彭启琮..导频符号调制方式对OFDM信道估计的影响[J].电子科技大学学报,2009,38(1):25-27,31,4.基金项目
国家自然科学基金(60672157,60672158,60575031) Foundation item:Supported by the National Natural Science Fund of China(60672157,60672158,60575031) （60672157,60672158,60575031）
