JP6480569B2 - 放送信号送受信装置及び方法 - Google Patents
放送信号送受信装置及び方法 Download PDFInfo
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Description
ベースプロファイルは主にルーフトップ(roof-top)アンテナと連結される固定された受信装置の主な用途を示す。ベースプロファイルはある場所に移動できるが、比較的停止した受信範疇に属する携帯用装置も含むことができる。ベースプロファイルの用途は若干の改善された実行によりハンドヘルド装置または車両用に拡張できるが、このような使用用途はベースプロファイル受信機動作では期待されない。
ハンドヘルドプロファイルは、バッテリー電源で駆動されるハンドヘルド及び車両用装置における使用のために設計される。当該装置は歩行者または車両速度で移動することができる。受信機複雑度だけでなく、消費電力はハンドヘルドプロファイルの装置の実現のために非常に重要である。ハンドヘルドプロファイルのターゲット信号対雑音比の範囲は略0乃至10dBであるが、より低い室内受信のために意図された場合、0dB以下に達するように設定できる。
アドバンスプロファイルは、より大きい実行複雑度に対する代価としてより高いチャネル能力を提供する。当該プロファイルはMIMO送信及び受信を使用することを要求し、UHDTVサービスはターゲット用途であり、このために当該プロファイルが特別に設計される。向上した能力は与えられた帯域幅でサービス数の増加、例えば、多数のSDTVまたはHDTVサービスを許容することにも使用できる。
ベースプロファイル及びハンドヘルドプロファイルにより共有されるBICMブロック及びアドバンスプロファイルのBICMブロックは、各々のデータパイプを処理するための複数の処理ブロックを含むことができる。
6)i=1から始めて次の動作を順次に実行
「001」:f_int、freq=0.25
「010」:f_int、freq=0.5
「011」:f_int、freq=0.75
「100」:f_int、freq=1.0
「101」〜「111」:予備(reserved)
図51のような方法をシンプルダイレクトマッピング方法と呼ぶこともできる。
k=0〜N_null−1
“01”:Boundary mapping(approach2)、
“10”:General mapping(approach3)、
“11”:Distributed mapping(approach4)
〔発明の実施の形態〕
Claims (18)
- 受信した放送信号を復調するFFT(Fast Fourier Transform)モジュールと、
前記復調された放送信号に含まれたパイロットを検出するパイロット検出モジュールと、
前記検出されたパイロットから前記放送信号の信号フレームをデフレーム(de−frame)し、PLP(Physical Layer Pipe)データを抽出するデフレーミングモジュール(de−frameing module)であって、前記信号フレームは、プリアンブル及び少なくとも1つのサブフレームを含む、デフレーミングモジュールと、
前記抽出したPLPデータをデコーディングするデコーディングモジュールと、
前記デコードしたPLPデータを処理しデータストリームを出力するアウトプットプロセシングモジュールと、
を含み、
前記サブフレームは、データシンボル、少なくとも1つのサブフレームバウンダリシンボル(SBS)及び、スキャタードパイロット(SPs)を含む前記データシンボルを含み、
前記SBSは、データセル及びサブフレームバウンダリパイロットを含み、
前記SBSのデータセルは、アクティブデータセルとヌルセルを含み、
前記アクティブデータセルは帯域の中心にあり、前記ヌルセルのそれぞれの半分はデータキャリアインデックス内のそれぞれの帯域端にあり、
前記プリアンブルは、FFTサイズを表す第1の情報と、SPパターンに関連した第2の情報と、SPブースティングパラメータを表す第3の情報を含む、放送信号受信機。 - 前記スキャタードパイロットの振幅は、スキャタードパイロットの電力ブースティングレベルを表すSPブースティングパラメータに基づいて決定され、
前記サブフレームバウンダリパイロットの振幅は、前記SPブースティングパラメータに基づいて決定される、請求項1に記載の放送信号受信機。 - ヌルセルの数は前記SBSのデータセルの数から前記SBSのアクティブデータセルの数を差し引いて取得される、請求項1に記載の放送信号受信機。
- 前記SBSのアクティブデータセルの数は、以下の数式に基づいて得られる、請求項8に記載の放送信号受信機。
NoA−(NSP,SBS−NoC+NoA+NNSP−CP)×(ASP)2、
ここで、NoAは前記データシンボルの中のアクティブデータセルの数であり、NSP,SPSはSBSパイロットの数であり、NoCはキャリアの数であり、NNSP−CPは連続するパイロット(CPs)を有する非スキャタードパイロット(SP)の数であり、ASPはスキャタードパイロットの振幅である。 - 受信した放送信号を復調するステップと、
前記復調した放送信号に含まれたパイロットを検出するステップと、
前記放送信号の信号フレームをデフレーミング(de−framing)し、PLP(Physical Layer Pipe)データを抽出するステップであって、前記信号フレームは、プリアンブル及び少なくとも1つのサブフレームを含む、ステップと、
前記PLPデータをデコーディングするステップと、
前記デコーディングしたPLPデータを処理し、データストリームを出力するステップと、
を含み、
前記サブフレームは、データシンボル、少なくとも1つのサブフレームバウンダリシンボル(SBS)及びスキャタードパイロット(SPs)を含む前記データシンボルを含み、
前記SBSは、データセル及びサブフレームバウンダリパイロットを含み、
前記SBSのデータセルは、アクティブデータセルとヌルセルを含み、
前記アクティブデータセルは帯域の中心にあり、前記ヌルセルのそれぞれの半分はデータキャリアインデックス内のそれぞれの帯域端にあり、
前記プリアンブルは、FFTサイズを表す第1の情報と、SPパターンに関連した第2の情報と、SPブースティングパラメータを表す第3の情報を含む、放送信号受信方法。 - 前記スキャタードパイロットの振幅は、スキャタードパイロットの電力ブースティングレベルを表すSPブースティングパラメータに基づいて決定され、
前記サブフレームバウンダリパイロットの振幅は、前記SPブースティングパラメータに基づいて決定される、請求項10に記載の放送信号受信方法。 - ヌルセルの数は前記SBSのデータセルの数から前記SBSのアクティブデータセルの数を差し引いて取得される、請求項10に記載の放送信号受信方法。
- 前記SBSのアクティブデータセルの数は、以下の数式に基づいて得られる、請求項17に記載の放送信号受信方法。
NoA−(NSP,SBS−NoC+NoA+NNSP−CP)×(ASP)2、
ここで、NoAは前記データシンボルの中のアクティブデータセルの数であり、NSP,SPSはSBSパイロットの数であり、NoCはキャリアの数であり、NNSP−CPは連続するパイロット(CPs)を有する非スキャタードパイロット(SP)の数であり、ASPはスキャタードパイロットの振幅である。
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