JP7328208B2 - 受信バンド・ノッチを有する任意ノイズ・シェーピング送信機 - Google Patents
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Description
本願は2017年8月8日付けで出願された米国出願番号第15/671,888号に対する優先権を主張しており、その内容は全体的に援用される。
本開示は無線技術に関連し、特に、例えば1つ以上の受信バンド・ノッチを有するスペクトル・マスクに適合するように送信機で任意ノイズ・シェーピングを行う技術に関連する。
無線通信デバイス(例えば、ユーザー装置(UE)、基地局(BS))の送信機は、送信バンド内で送信信号を生成しており、潜在的に送信バンドの外でかなりのノイズを生成する可能性がある。このノイズは、ターゲットACLR(隣接チャネル漏洩電力比)を越えること、Rx(受信機)バンドにおけるターゲット・ノイズを越えること、帯域外放射のターゲット・ノイズを越えること等の1つ以上の理由によりターゲット・ノイズ・レベルを超える可能性がある。ターゲット・ノイズ・レベルを満たすために、ノイズ・シェーピングを使用することが可能であり、送信機の設計がこれらのターゲットを組み込むスペクトル・マスクを充足する又はそれを越えることを保証する。
表1:様々な減衰に対するBc及びBpの具体的な値
表2:xq,cq,eq,pq,cq+pq及びyqに対するビット値の例
Claims (18)
- 送信機の中で使用されるように構成された装置であって:
入力信号xqを受信し;及び
前記入力信号xqにノイズ・シェーピングを適用し、ノイズ・シェーピングされた出力信号yqを生成するように構成されたノイズ・シェーパーを有し、
前記ノイズ・シェーピングされた出力信号yqの帯域内ノイズは前記ノイズ・シェーパーに関連するスペクトル・マスクの帯域内ノイズ閾値未満であり、前記ノイズ・シェーピングされた出力信号yqの帯域外ノイズは前記スペクトル・マスクの帯域外ノイズ閾値未満であり、キャリア信号の複数のバンドパス領域各々における前記出力信号yqのノイズは、前記スペクトル・マスクのバンドパス領域に対する関連するノイズ閾値未満であり、
前記ノイズ・シェーパーは、入力信号xqにおけるDAC(ディジタル-アナログ変換器)の非線形性を補償するように構成されている、装置。 - 前記ノイズ・シェーパーは、前記入力信号xqにノイズ・シェーピングを適用するためにデルタ・シグマ変調を使用するように更に構成されている、請求項1に記載の装置。
- 前記ノイズ・シェーパーは、前記入力信号xqにノイズ・シェーピングを適用するためにピラミッド・エンコーディングを使用するように更に構成されている、請求項1に記載の装置。
- 前記ノイズ・シェーパーは:
前記入力信号xqのBpLSB(最下位ビット)を含む信号eqを受信するように構成されたピラミッド・エンコーダであって、前記ピラミッド・エンコーダの複数のフィルタ・タップと前記信号eqとに基づいてノイズ・シェーピングされたBpビット信号pqを生成するピラミッド・エンコーダ;及び
合成信号cq+pqを生成するために、前記入力信号x q のBcMSB(最上位ビット)を含むBcビット信号cqに前記ノイズ・シェーピングされたBpビット信号を加算するように構成された加算器;
を含み、前記ノイズ・シェーパーは前記合成信号cq+pqに基づいてノイズ・シェーピングされた出力信号yqを生成するように構成されている、請求項3に記載の装置。 - 前記ノイズ・シェーパーは、前記ノイズ・シェーピングされた出力信号yqを生成するために、前記合成信号cq+pqに飽和演算を適用するように構成される飽和回路を更に有する、請求項4に記載の装置。
- 前記ノイズ・シェーピングされたBpビット信号pqと前記Bcビット信号cqとは少なくとも1ビットだけオーバーラップしている、請求項4に記載の装置。
- 前記ノイズ・シェーピングされた出力信号yqの帯域外領域の少なくとも一部に対する前記帯域外ノイズは、前記スペクトル・マスクのバンドパス領域各々に対する関連するノイズ閾値を上回っている、請求項1に記載の装置。
- 前記ノイズ・シェーパーは、複数のフィルタ・タップにより前記入力信号xqにノイズ・シェーピングを適用するように構成されている、請求項1に記載の装置。
- 前記ノイズ・シェーパーは、前記複数のフィルタ・タップの事前に計算された値のルックアップ・テーブルに基づいて前記フィルタ・タップを生成するように構成されている、請求項8に記載の装置。
- 前記ノイズ・シェーパーはMレベル量子化器に基づいて前記フィルタ・タップを生成するように構成され、Mは3以上である、請求項8に記載の装置。
- 送信機の中で使用されるように構成された装置であって:
信号xqを受信し、Bcビット信号cqを生成するように構成された量子化器であって、Bcは正の整数である、量子化器;
差分信号eqを生成するために、前記信号xqから前記Bcビット信号cqを減算するように構成された第1加算器;
前記差分信号eqを受信し、ノイズ・シェーピングされたBpビット信号pqを生成するように構成されたノイズ・シェーパーであって、BpはBcより小さな正の数である、ノイズ・シェーパー;及び
ノイズ・シェーピングされたByビット信号cq+pqを生成するために、前記Bcビット信号cqと前記ノイズ・シェーピングされたBpビット信号pqとを合成するように構成された第2加算器であって、ByはBcより大きな正の整数である、第2加算器;
を有する装置。 - 前記ノイズ・シェーピングされたByビット信号cq+pqを受信し、ノイズ・シェーピングされた飽和Byビット信号yqを生成するように構成される飽和回路を更に有する、請求項11に記載の装置。
- 前記信号xqにおけるDAC(ディジタル-アナログ変換器)の非線形性を補償するように構成されたDACモデルを更に有する請求項11に記載の装置。
- 前記ノイズ・シェーパーは、前記信号xqにノイズ・シェーピングを適用するためにデルタ・シグマ変調を使用するように更に構成されている、請求項11-13のうちの何れか1項に記載の装置。
- 前記ノイズ・シェーパーは、前記信号xqにノイズ・シェーピングを適用するためにピラミッド・エンコーディングを使用するように更に構成されている、請求項11-13のうちの何れか1項に記載の装置。
- 入力信号xqを受信し、前記入力信号xqにノイズ・シェーピングを適用し、ノイズ・シェーピングされた出力信号yqを生成することを送信機のコンピュータに実行させる命令を有するコンピュータ・プログラムであって、
前記ノイズ・シェーピングされた出力信号yqの帯域内ノイズは前記送信機のノイズ・シェーパーに関連するスペクトル・マスクの帯域内ノイズ閾値未満であり、前記ノイズ・シェーピングされた出力信号yqの帯域外ノイズは前記スペクトル・マスクの帯域外ノイズ閾値未満であり、キャリア信号の複数のバンドパス領域各々における前記出力信号yqのノイズは、前記スペクトル・マスクのバンドパス領域に対する関連するノイズ閾値未満であり、
前記命令は、入力信号xqにおけるDAC(ディジタル-アナログ変換器)の非線形性を補償することを前記送信機のコンピュータに実行させる、コンピュータ・プログラム。 - 前記命令は、前記入力信号xqにノイズ・シェーピングを適用するためにデルタ・シグマ変調を前記送信機のコンピュータに使用させる、請求項16に記載のコンピュータ・プログラム。
- 前記命令は、前記入力信号xqにノイズ・シェーピングを適用するためにピラミッド・エンコーディングを前記送信機のコンピュータに使用させる、請求項16に記載のコンピュータ・プログラム。
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US15/671,888 | 2017-08-08 | ||
US15/671,888 US10044367B1 (en) | 2017-08-08 | 2017-08-08 | Arbitrary noise shaping transmitter with receive band notches |
PCT/US2018/044479 WO2019032331A1 (en) | 2017-08-08 | 2018-07-31 | ARBITRARY NOISE SHAPING TRANSMITTER WITH RECEIVING BAND CUTTERS |
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US11483722B2 (en) | 2019-09-17 | 2022-10-25 | Corning Research & Development Corporation | Multi-band remote unit in a wireless communications system (WCS) |
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US20060217082A1 (en) | 2005-03-22 | 2006-09-28 | Georg Fischer | Shaping noise in power amplifiers of duplex communication systems |
JP2014064236A (ja) | 2012-09-24 | 2014-04-10 | Sumitomo Electric Ind Ltd | 信号処理装置及び無線機 |
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