Average BER Performance of Multicarrier CDMA Mobile Radio Using Joint Transmit/Receive MMSE-FDE
نویسندگان
چکیده
あらまし 次世代移動無線通信システムで要求される数ギガビット毎秒のデータ通信の実現には厳しい周波数選 択性チャネルの克服が必須である.周波数領域拡散を用いるマルチキャリア(MC)符号分割多元接続(CDMA)伝送で は,最小平均二乗誤差(MMSE)規範に基づく 1 タップの周波数領域受信等化(受信 MMSE-FDE)を用いることで優れ た伝送特性を実現できることが知られている.ところで,送信機がチャネル情報を有しているときには,MMSE規 範に基づく 1タップの周波数領域送信等化(送信MMSE-FDE)が適用可能であることが示されている.筆者らは,チ ャネル情報を送受信機が共有している場合に送受信機でそれぞれ 1 タップの FDE を行うジョイント送信/受信 MMSE-FDEを提案してきた.本稿ではMC-CDMA伝送を対象に,これら 3種のMMSE-FDEの比較と考察を行う. それぞれの FDEの特徴に加え,平均ビット誤り率(BER)特性を計算機シミュレーションにより明らかにする. キーワード MC-CDMA,周波数領域等化,送信等化
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