MIMOSC-FDE伝送に於けるISIキヤンセラー及びMLDを用いた繰り返し信号分離検出方式

摘要

本稿では，周波数選択性MIMO（Multiple-Input Multiple-Output）通信路に於いて，OFDMやMC-CDMAと同じく，優れた伝送特性を有する，SC-FDE（Single-Carrier Frequency Domain Equalization）方式の受信機構成につき述べる.SC-FDEを前段に用いて空間多重の分離と周波数領域等化を行い，後段でISIキャンセラーと最尤判定法（MLD，Maximum Likelihood Detection）を組み合わた時間領域等化を繰り返し行うことで，前段のSC-FDEによる推定結果を改善する方式を提案する.計算機シミュレーションにより優れたBER特性が得られることを示した.%In this paper we have proposed a novel receiver structure using SC-FDE (Single-Carrier Frequency Domain Equalization), which exhibits good BER performances like OFDM and MC-CDMA on MIMO (Multiple-Input Multiple-Output) frequency selective fading channels. The SC-FDE is used for the frequency domain equalization at the first stage in the receiver, and then the ISI canceller and MLD (Maximum Likelihood Detection) are used for the time domain equalization at the next stage. This time domain equalization has been done iteratively and improved the estimation quality obtained from the SC-FDE. Computer simulation results show the effectiveness of the proposed receiver structure.