Single-Carrier MIMO Multiplexing Using 2-step QRM-ML Block Signal Detection
نویسندگان
چکیده
あらまし QR 分解と M アルゴリズムを用いる演算量削減型最尤ブロック信号検出法(QRM-MLBD)は,最尤検出 (MLD)から演算量を大幅に削減しつつ,最小二乗誤差規範に基づく空間フィルタリング(MMSED)に比べシングルキ ャリア(SC)マルチ送受信アンテナ(MIMO)多重伝送の伝送特性を大幅に改善できる.しかしながら,M アルゴリズ ムにおけるパスメトリック演算では,各ステージで全てのシンボル候補について計算を行うため,QRM-MLBD の 演算量は依然として大きい.そこでシングルアンテナ(SISO)伝送を対象に,筆者らは最近,MMSE 規範に基づく周 波数領域等化(MMSE-FDE)出力から事後確率を計算してシンボル候補を絞り込むことでパスメトリック演算量を削 減する 2 ステップ QRM-MLBD を提案した.本報告では,2 ステップ QRM-MLBD を用いる SC-MIMO 多重伝送を 対象に, シンボル候補の絞り込み結果と送信アンテナ順番とを考慮した適応オーダリング提案する.2×2 SC-MIMO 多重伝送の場合,適応オーダリングを導入した 2 ステップ QRM-MLBD は QRM-MLBD と同等のスルー プット特性を達成しつつ,演算量を QRM-MLBD のおよそ 1/30 まで削減できることを計算機シミュレーションによ り示す. キーワード シングルキャリア,MIMO,MLD,MMSED,QR 分解,M アルゴリズム
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تاریخ انتشار 2012