JPWO2015114836A1 - 送信機,送受信回路および無線送受信システム - Google Patents
送信機,送受信回路および無線送受信システム Download PDFInfo
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Abstract
Description
3 アンテナ
11 送信機
12 受信機
13 送信特性制御信号
14 受信特性制御信号
21 デジタル回路
22 マッチング回路・スイッチ
52 減衰器
53 整合器(マッチング回路)
110 フラクショナルN型PLL回路
111 可変分周器(プログラム分周器)
112 電圧制御発振器(VCO,LC−VCO)
113 分周器
114 電力増幅器(PA)
115 位相周波数検出器/チャージポンプ/ループフィルタ部(PFD/CP/LF)
116 シグマデルタモジュレータ(SDM)
117 周波数変調D/A変換器(FM DAC)
118 データインターフェース
119 クロックジェネレータ
121 可変電力低雑音増幅器(低雑音増幅器:LNA)
125 オフセットトリマ
201 シリアルペリフェラルインターフェース(SPI)
202 双方向データインターフェース
210 デジタルベースバンド回路
1141 配線負荷容量
1142 シングル−差動変換回路
1151 位相周波数検出器(PFD)
1152 チャージポンプ(CP)
1153 ループフィルタ(LF)
1220 LC並列共振回路(LCタンク)
1221,1222 ミキサ
1231,1232 LPF(プログラマブルLPF)
1241,1242 ADC
(付記1)
第1周波数の信号を変調する第1パスからの第1位相変調信号、および、前記第1周波数よりも高い第2周波数の信号を変調する第2パスからの第2位相変調信号を受け取る位相同期回路と、
利得を制御する第3パスからの第3変調信号を受け取る電力増幅器と、を有する送信機であって、
前記位相同期回路は、
前記第1位相変調信号により分周比が制御される可変分周器と、
前記第2位相変調信号を周波数変調D/A変換する周波数変調D/A変換器と、
バラクタを含み、前記第1位相変調信号に基づく第1制御電圧および前記第2位相変調信号に基づく第2制御電圧を受け取って発振周波数を制御する電圧制御発振器と、を有し、
データ転送速度に基づいて、前記電圧制御発振器における前記バラクタの容量値、前記周波数変調D/A変換器の制御ビット数、および、前記周波数変調D/A変換器のバイアス電流の少なくとも1つを変化させる、
ことを特徴とする送信機。
前記データ転送速度が、第1データ転送速度よりも高い第2データ転送速度のとき、前記バラクタの容量値を、前記第1データ転送速度の容量値よりも大きくする、
ことを特徴とする付記1に記載の送信機。
前記データ転送速度が、第1データ転送速度よりも高い第2データ転送速度のとき、前記周波数変調D/A変換器の制御ビット数を、前記第1データ転送速度のビット数よりも多くする、
ことを特徴とする付記1に記載の送信機。
前記データ転送速度が、第1データ転送速度よりも高い第2データ転送速度のとき、前記周波数変調D/A変換器のバイアス電流を、前記第1データ転送速度のバイアス電流よりも大きくする、
ことを特徴とする付記1に記載の送信機。
前記データ転送速度が、第1データ転送速度よりも高い第2データ転送速度のとき、前記第3変調信号により、前記電力増幅器の出力を、前記第1データ転送速度の出力よりも減衰させる、
ことを特徴とする付記1乃至付記4のいずれか1項に記載の送信機。
さらに、前記第1位相変調信号を受け取ってシグマデルタ変調を行うシグマデルタモジュレータを有し、
前記可変分周器は、前記シグマデルタモジュレータの出力に基づいて分周比が制御される、
ことを特徴とする付記5に記載の送信機。
さらに、前記第3変調信号を受け取る振幅変調デコーダを有し、
前記電力増幅器は、前記振幅変調デコーダの出力に基づいて利得が制御される、
ことを特徴とする付記6に記載の送信機。
さらに、前記可変分周器の出力を受け取って位相周波数検出を行い、チャージポンプおよびループフィルタを介して前記電圧制御発振器に入力する前記第1制御電圧を制御する位相周波数検出器を有する、
ことを特徴とする付記7に記載の送信機。
前記周波数変調D/A変換器,前記シグマデルタモジュレータ,前記振幅変調デコーダおよび前記位相周波数検出器に入力するクロックを、前記データ転送速度に基づいて変化させる、
ことを特徴とする付記8に記載の送信機。
付記1乃至付記9のいずれか1項に記載の送信機、および、受信機を有する、
ことを特徴とする送受信回路。
前記受信機は、
受信信号を増幅する低雑音増幅器と、
前記低雑音増幅器の出力と、ローカル周波数信号を混合するミキサと、
前記ミキサの出力を、カットオフ周波数を可変として低域周波数を通過させる可変カットオフ周波数ローパスフィルタと、
前記可変カットオフ周波数ローパスフィルタの出力を、サンプリング周波数を可変としてA/D変換する可変サンプリング周波数A/D変換器と、を含む、
ことを特徴とする付記10に記載の送受信回路。
前記受信機は、
受信信号を、電力を可変として増幅する可変電力低雑音増幅器と、
前記可変電力低雑音増幅器の出力と、ローカル周波数信号を混合するミキサと、
前記ミキサの出力の低域周波数を通過させるローパスフィルタと、
前記ローパスフィルタの出力をA/D変換するA/D変換器と、を含む、
ことを特徴とする付記10に記載の送受信回路。
付記10乃至付記12のいずれか1項に記載の送受信回路を含む少なくとも1つのノードと、
付記10乃至付記12のいずれか1項に記載の送受信回路を含む少なくとも1つのハブと、を有する、
ことを特徴とする無線送受信システム。
付記12に記載の送受信回路を含む少なくとも1つのノードと、
付記12に記載の送受信回路を含む少なくとも1つのハブと、を有する無線送受信システムであって、
前記ノードおよびハブにおいて、
信号を受け取る受信側の送受信回路における前記可変電力低雑音増幅器は、前記可変電力低雑音増幅器により前記受信信号を増幅する電力を低下したとき、拡散係数を2以上に設定する、
ことを特徴とする無線送受信システム。
付記12に記載の送受信回路を含む少なくとも1つのノードと、
付記12に記載の送受信回路を含む少なくとも1つのハブと、を有する無線送受信システムであって、
前記ノードおよびハブにおいて、
信号を受け取る受信側の送受信回路における前記可変電力低雑音増幅器は、前記可変電力低雑音増幅器により前記受信信号を増幅する電力を低下したとき、前記周波数変調D/A変換器の制御ビット数、および、前記周波数変調D/A変換器のバイアス電流の少なくとも一方を変化させる、
ことを特徴とする無線送受信システム。
3 アンテナ
11 送信機
12 受信機
13 送信特性制御信号
14 受信特性制御信号
21 デジタル回路
22 マッチング回路・スイッチ
52 減衰器
53 整合器(マッチング回路)
110 フラクショナルN型PLL回路
111 可変分周器(プログラム分周器)
112 電圧制御発振器(VCO,LC−VCO)
113 分周器
114 電力増幅器(PA)
115 位相周波数検出器/チャージポンプ/ループフィルタ部(PFD/CP/LF)
116 シグマデルタモジュレータ(SDM)
117 周波数変調D/A変換器(FM DAC)
118 データインターフェース
119 クロックジェネレータ
121 可変電力低雑音増幅器(低雑音増幅器:LNA)
125 オフセットトリマ
201 シリアルペリフェラルインターフェース(SPI)
202 双方向データインターフェース
210 デジタルベースバンド回路
1141 配線負荷容量
1142 シングル−差動変換回路
1151 位相周波数検出器(PFD)
1152 チャージポンプ(CP)
1153 ループフィルタ(LF)
1220 LC並列共振回路(LCタンク)
1221,1222 ミキサ
1231,1232 LPF(プログラマブルLPF)
1241,1242 ADC
Claims (15)
- 第1周波数の信号を変調する第1パスからの第1位相変調信号、および、前記第1周波数よりも高い第2周波数の信号を変調する第2パスからの第2位相変調信号を受け取る位相同期回路と、
利得を制御する第3パスからの第3変調信号を受け取る電力増幅器と、を有する送信機であって、
前記位相同期回路は、
前記第1位相変調信号により分周比が制御される可変分周器と、
前記第2位相変調信号を周波数変調D/A変換する周波数変調D/A変換器と、
バラクタを含み、前記第1位相変調信号に基づく第1制御電圧および前記第2位相変調信号に基づく第2制御電圧を受け取って発振周波数を制御する電圧制御発振器と、を有し、
データ転送速度に基づいて、前記電圧制御発振器における前記バラクタの容量値、前記周波数変調D/A変換器の制御ビット数、および、前記周波数変調D/A変換器のバイアス電流の少なくとも1つを変化させる、
ことを特徴とする送信機。 - 前記データ転送速度が、第1データ転送速度よりも高い第2データ転送速度のとき、前記バラクタの容量値を、前記第1データ転送速度の容量値よりも大きくする、
ことを特徴とする請求項1に記載の送信機。 - 前記データ転送速度が、第1データ転送速度よりも高い第2データ転送速度のとき、前記周波数変調D/A変換器の制御ビット数を、前記第1データ転送速度のビット数よりも多くする、
ことを特徴とする請求項1に記載の送信機。 - 前記データ転送速度が、第1データ転送速度よりも高い第2データ転送速度のとき、前記周波数変調D/A変換器のバイアス電流を、前記第1データ転送速度のバイアス電流よりも大きくする、
ことを特徴とする請求項1に記載の送信機。 - 前記データ転送速度が、第1データ転送速度よりも高い第2データ転送速度のとき、前記第3変調信号により、前記電力増幅器の出力を、前記第1データ転送速度の出力よりも減衰させる、
ことを特徴とする請求項1乃至請求項4のいずれか1項に記載の送信機。 - さらに、前記第1位相変調信号を受け取ってシグマデルタ変調を行うシグマデルタモジュレータを有し、
前記可変分周器は、前記シグマデルタモジュレータの出力に基づいて分周比が制御される、
ことを特徴とする請求項5に記載の送信機。 - さらに、前記第3変調信号を受け取る振幅変調デコーダを有し、
前記電力増幅器は、前記振幅変調デコーダの出力に基づいて利得が制御される、
ことを特徴とする請求項6に記載の送信機。 - さらに、前記可変分周器の出力を受け取って位相周波数検出を行い、チャージポンプおよびループフィルタを介して前記電圧制御発振器に入力する前記第1制御電圧を制御する位相周波数検出器を有する、
ことを特徴とする請求項7に記載の送信機。 - 前記周波数変調D/A変換器,前記シグマデルタモジュレータ,前記振幅変調デコーダおよび前記位相周波数検出器に入力するクロックを、前記データ転送速度に基づいて変化させる、
ことを特徴とする請求項8に記載の送信機。 - 請求項1乃至請求項9のいずれか1項に記載の送信機、および、受信機を有する、
ことを特徴とする送受信回路。 - 前記受信機は、
受信信号を増幅する低雑音増幅器と、
前記低雑音増幅器の出力と、ローカル周波数信号を混合するミキサと、
前記ミキサの出力を、カットオフ周波数を可変として低域周波数を通過させる可変カットオフ周波数ローパスフィルタと、
前記可変カットオフ周波数ローパスフィルタの出力を、サンプリング周波数を可変としてA/D変換する可変サンプリング周波数A/D変換器と、を含む、
ことを特徴とする請求項10に記載の送受信回路。 - 前記受信機は、
受信信号を、電力を可変として増幅する可変電力低雑音増幅器と、
前記可変電力低雑音増幅器の出力と、ローカル周波数信号を混合するミキサと、
前記ミキサの出力の低域周波数を通過させるローパスフィルタと、
前記ローパスフィルタの出力をA/D変換するA/D変換器と、を含む、
ことを特徴とする請求項10に記載の送受信回路。 - 請求項10乃至請求項12のいずれか1項に記載の送受信回路を含む少なくとも1つのノードと、
請求項10乃至請求項12のいずれか1項に記載の送受信回路を含む少なくとも1つのハブと、を有する、
ことを特徴とする無線送受信システム。 - 請求項12に記載の送受信回路を含む少なくとも1つのノードと、
請求項12に記載の送受信回路を含む少なくとも1つのハブと、を有する無線送受信システムであって、
前記ノードおよびハブにおいて、
信号を受け取る受信側の送受信回路における前記可変電力低雑音増幅器は、前記可変電力低雑音増幅器により前記受信信号を増幅する電力を低下したとき、拡散係数を2以上に設定する、
ことを特徴とする無線送受信システム。 - 請求項12に記載の送受信回路を含む少なくとも1つのノードと、
請求項12に記載の送受信回路を含む少なくとも1つのハブと、を有する無線送受信システムであって、
前記ノードおよびハブにおいて、
信号を受け取る受信側の送受信回路における前記可変電力低雑音増幅器は、前記可変電力低雑音増幅器により前記受信信号を増幅する電力を低下したとき、前記周波数変調D/A変換器の制御ビット数、および、前記周波数変調D/A変換器のバイアス電流の少なくとも一方を変化させる、
ことを特徴とする無線送受信システム。
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