周波数選択性MIMO通信路に於けるLDPC符号化時間額域ブロック処理型等化・分離方式の検討

摘要

本研究では，MIMO周波数選択性フェージング通信路に対して，シングルキャリヤ伝送を用いた，時間領域に於ける受信信号の等化・分離処理方式の検討を行う．筆者等は，これまでに周波数選択性MIMO（Multi-Input Multi-Output）通信路に於ける時間領域ブロック処理型MLD等化方式を検討したが，復号演算量に問題があった．そこで，MMSE基準に基づくQR分解を用いたMMSE-QRD-M（MMSE QR Decomposition with Malgorithm）時間領域ブロック処理型信号等化分離方式を提案する．さらに，誤り訂正LDPC（Low Densityl Parity Check）符号を提案方式と組み合わせたLDPC-MMSE-QRD-M方式の検討を行う．%In this paper, we have proposed a novel block processing signal equalization and separation scheme in time domain for single carrier transmission on frequency selective MIMO fading channels. We call the proposed scheme as the time domain block processing equalizer with MMSE-QRD-M (Minimum Mean Square Error based QR Decomposition with M algorithm). The BER characteristics of the proposed scheme have been compared with the existing BLE (Block Linear Equalizer) or time domain block processing equalizer with QRD-M. Furthermore, we have examined the LDPC coded version of the proposed scheme. The effectiveness of the proposed time domain equalization scheme has been clarified through computer simulations.