CAJ | 학술논문

为准确掌握信道特性,提出了基于离散椭球基—基扩展模型( Discrete Prolate Spheroidal Se-quences-Basis Expansion Model,DPSS-BEM)的OFDM信道估计方法。采用二维DPSS-BEM对信道进行建模,将信道视为二维正交分量的线性加权,并利用导频位置的训练信息估计权值。仿真表明,该方法与基于极值BEM算法、卡尔曼估计法比较,能有效跟踪OFDM信道变化,改善信道的归一化均方误差和误码率性能。
위준학장악신도특성,제출료기우리산타구기—기확전모형( Discrete Prolate Spheroidal Se-quences-Basis Expansion Model,DPSS-BEM)적OFDM신도고계방법。채용이유DPSS-BEM대신도진행건모,장신도시위이유정교분량적선성가권,병이용도빈위치적훈련신식고계권치。방진표명,해방법여기우겁치BEM산법、잡이만고계법비교,능유효근종OFDM신도변화,개선신도적귀일화균방오차화오마솔성능。
To master the channel characteristics,broadband power line carrier OFDM channel estimation based on DPSS-BEM is proposed,which models power line channel by using two-dimensional DPSS-BEM to regard the power line channel as linear weighting of two-dimensional orthogonal components,then treated the channel variation during OFDM symbol as the variety of weights,and then utilized the training information from pilots method to estimate weights to complete channel estimation. The simulation results show that the method can ef-fectively track the changes of power line channel,obviously improve the normalized mean square error and bit error rate performance.