CAJ | 학술논문

在相关检测的OFDM系统中,信道估计具有十分重要的意义.研究了一种在单音干扰环境下的OFDM系统中基于预编码的盲信道估计方案.利用接收的干扰信号的频域信息对单音干扰信号进行准确估计与重构,有效地消除了干扰信号的影响,提高了单音干扰下盲信道估计的准确性.与其他盲信道估计算法相比,基于预编码的盲信道估计算法具有较低的运算复杂度以及较快的收敛速度.仿真结果表明了该算法在干扰估计以及信道估计两方面都取得了较好的性能.
재상관검측적OFDM계통중,신도고계구유십분중요적의의.연구료일충재단음간우배경하적OFDM계통중기우예편마적맹신도고계방안.이용접수적간우신호적빈역신식대단음간우신호진행준학고계여중구,유효지소제료간우신호적영향,제고료단음간우하맹신도고계적준학성.여기타맹신도고계산법상비,기우예편마적맹신도고계산법구유교저적운산복잡도이급교쾌적수렴속도.방진결과표명료해산법재간우고계이급신도고계량방면도취득료교호적성능.
Channel estimation is very important in the coherent detection Orthogonal Frequency Division Multi-plexing(OFDM)systems. A precoded-based blind channel estimation method for OFDM systems in the presence of single tone interference is studied. By using the frequency domain information of received signals to accurately estimate and reconstruct the interference signals,the proposed method can eliminate the effects of interference signals and improve the accuracy of channel estimation. Compared with other blind channel estimation algo-rithms,the precoded-based blind channel estimation has low complexity and fast convergence speed. The simu-lation results show that the proposed method achieves good performances both in the estimation of interferences and channel.