公开(公告)号：US06584305B1

公开(公告)日：2003-06-24

申请号：US09075884

申请日：1998-05-11

申请人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Hiroaki Sudo ,  Fujio Sasaki

发明人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Hiroaki Sudo ,  Fujio Sasaki

IPC分类号： H04B110

CPC分类号： H03D7/166 ,  H03D3/007 ,  H03H17/02 ,  H04B1/00 ,  H04B1/28 ,  H04L5/06

摘要： A radio receiving system includes an orthogonally-modulated waveform detection/channel filter section 4, an I signal root Nyquist filter 20, a Q signal root Nyquist filter 21, and a signal detection/demodulation section 25. The orthogonally-modulated waveform detection/channel filter section 4 further includes a first filter (a band pass filter) 2 which permits passage of only a signal at a frequency band assigned to a communications system from which the radio receiving system receives a signal; a sample-and-hold circuit 5; a Hilbert transformer 6; a first channel filter 7 through N-th channel filter 9; and a clock signal shaping/controlling section 15. The band pass filter 2 is provided with the characteristics which cancel the aperture effect due to a sampling operation, thus compensating for the aperture effect due to a sampling operation.

摘要翻译： 无线接收系统包括正交调制波形检测/信道滤波器部分4，I信号根奈奎斯特滤波器20，Q信号根奈奎斯特滤波器21和信号检测/解调部分25.正交调制波形检测/信道 滤波器部分4还包括允许仅分配给无线电接收系统从其接收信号的通信系统的频带通过信号的第一滤波器（带通滤波器）2; 采样保持电路5; 希尔伯特变压器6; 第一通道滤波器7至N通道滤波器9; 和时钟信号整形/控制部分15.带通滤波器2具有由于采样操作而消除孔径效应的特性，从而补偿由采样操作引起的孔径效应。

公开(公告)号：US6104764A

公开(公告)日：2000-08-15

申请号：US456449

申请日：1999-12-08

申请人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Hiroaki Sudo ,  Fujio Sasaki

发明人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Hiroaki Sudo ,  Fujio Sasaki

IPC分类号： H04B1/16 ,  H03D3/00 ,  H04B1/26 ,  H04B1/30 ,  H03D1/22

CPC分类号： H04B1/26 ,  H03D3/009 ,  H04B1/0014 ,  H04B1/0039 ,  H04B1/30 ,  H03D3/006 ,  H03D3/007

摘要： A received signal obtained from an antenna is subjected to high-frequency amplification. The amplified signal is supplied to a first bandpass filter, which extracts only signals of all the channels of a communications system concerned while filtering out other radio signals. The extracted signals are frequency-converted by using a local oscillation frequency, and only a desired wave is passed by a second bandpass filter. The desired wave is supplied to a sample-and-hold circuit, which performs sampling according to the bandwidth-limiting sampling theorem. A resulting discrete signal is supplied to an I-axis-component and Q-axis-component separating circuits, where the polarity of sample values is inverted for every other clock pulse with respect to each of the I and Q axes to thereby effect Hilbert transform. Resulting two orthogonal components on a phase plane are supplied to a complex coefficient filter.

公开(公告)号：US6044254A

公开(公告)日：2000-03-28

申请号：US999068

申请日：1997-12-29

申请人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Fujio Sasaki ,  Hiroaki Sudo

发明人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Fujio Sasaki ,  Hiroaki Sudo

IPC分类号： H04B1/12 ,  H04B1/16 ,  H04B7/08

CPC分类号： H04B7/0894 ,  H04B1/126 ,  H04B7/0885 ,  H04B7/0888

摘要： A receiving circuit includes a first antenna 1, a second antenna 2, units 10 and 11 for generating a sum signal or a difference signal from signals of two paths received by the respective antennas, a unit 12 for giving delay to either an output of the sum signal generating unit or an output of the difference signal generating unit, a unit 13 for summationally combining an output of the delay unit and the signal of the not-delayed path, a desired-wave pass filter unit 14 for receiving an output of the summationally combining unit, a dividing unit 15 for receiving an output of the desired-wave pass filter unit, an orthogonal detection unit 16-19 for receiving an output of the dividing unit, and a filter unit 20 and 21 for receiving an output of the orthogonal detection unit to extract a base band signal therefrom, wherein the receiving path including the summationally combining unit and the following are made into one path to thereby attain miniaturization and low power consumption.

摘要翻译： 接收电路包括：第一天线1，第二天线2，用于从由各个天线接收的两个路径的信号产生和信号或差分信号的单元10和11;用于给 和信号生成单元或差分信号生成单元的输出，用于将延迟单元的输出和未延迟路径的信号进行合计组合的单元13，用于接收延迟单元的输出的期望波通滤波器单元14， 合成组合单元，用于接收期望波通滤波器单元的输出的分割单元15，用于接收分割单元的输出的正交检测单元16-19和用于接收分频单元的输出的滤波单元20和21 正交检测单元从其中提取基带信号，其中包括合成组合单元和以下的接收路径被制成一个路径，从而实现小型化和低功耗。

公开(公告)号：US06922454B2

公开(公告)日：2005-07-26

申请号：US10278540

申请日：2002-10-23

申请人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Hiroaki Sudo ,  Fujio Sasaki

发明人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Hiroaki Sudo ,  Fujio Sasaki

IPC分类号： H04B1/26 ,  H03D3/00 ,  H03D7/16 ,  H03H17/02 ,  H04B1/00 ,  H04B1/28 ,  H04L5/06 ,  H04B1/10

CPC分类号： H03D7/166 ,  H03D3/007 ,  H03H17/02 ,  H04B1/00 ,  H04B1/28 ,  H04L5/06

摘要： A radio receiving system, which receives an input signal in a direct conversion receiving mode through the use of a plurality of cascaded channel filters, each including a complex coefficient filter, to obtain a desired waveform, wherein a center frequency of a preliminary channel filter corresponds more closely with the frequency of the desired waveform than a center frequency of a subsequent channel filter.

摘要翻译： 一种无线电接收系统，其通过使用多个级联信道滤波器以直接转换接收模式接收输入信号，每个包括复系数滤波器，以获得期望的波形，其中初步信道滤波器的中心频率对应于 更接近所需波形的频率，而不是随后的信道滤波器的中心频率。

公开(公告)号：US06307897B1

公开(公告)日：2001-10-23

申请号：US09456469

申请日：1999-12-08

申请人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Hiroaki Sudo ,  Fujio Sasaki

发明人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Hiroaki Sudo ,  Fujio Sasaki

IPC分类号： H04L2722

CPC分类号： H04B1/26 ,  H03D3/006 ,  H03D3/007 ,  H03D3/009 ,  H04B1/0014 ,  H04B1/0039 ,  H04B1/30

摘要： A received signal obtained from an antenna is subjected to high-frequency amplification. The amplified signal is supplied to a first bandpass filter, which extracts only signals of all the channels of a communications system concerned while filtering out other radio signals. The extracted signals are frequency-converted by using a local oscillation frequency, and only a desired wave is passed by a second bandpass filter. The desired wave is supplied to a sample-and-hold circuit, which performs sampling according to the bandwidth-limiting sampling theorem. A resulting discrete signal is supplied to an I-axis-component and Q-axis-component separating circuits, where the polarity of sample values is inverted for every other clock pulse with respect to each of the I and Q axes to thereby effect Hilbert transform. Resulting two orthogonal components on a phase plane are supplied to a complex coefficient filter.

摘要翻译： 从天线获得的接收信号经受高频放大。 放大的信号被提供给第一带通滤波器，其仅提取所涉及的通信系统的所有信道的信号，同时滤除其他无线电信号。 所提取的信号通过使用本地振荡频率进行频率转换，并且只有期望的波通过第二带通滤波器。 将期望的波提供给采样保持电路，该采样保持电路根据带宽限制采样定理进行采样。 得到的离散信号被提供给I轴分量和Q轴分量分离电路，其中样本值的极性相对于I和Q轴中的每一个针对每隔一个时钟脉冲反相，从而实现希尔伯特变换 。 相位平面上产生的两个正交分量被提供给复系数滤波器。

公开(公告)号：US6101226A

公开(公告)日：2000-08-08

申请号：US456447

申请日：1999-12-08

申请人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Hiroaki Sudo ,  Fujio Sasaki

发明人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Hiroaki Sudo ,  Fujio Sasaki

IPC分类号： H04B1/16 ,  H03D3/00 ,  H04B1/26 ,  H04B1/30 ,  H03D1/22

CPC分类号： H04B1/26 ,  H03D3/009 ,  H04B1/0014 ,  H04B1/0039 ,  H04B1/30 ,  H03D3/006 ,  H03D3/007

摘要： A received signal obtained from an antenna is subjected to high-frequency amplification. The amplified signal is supplied to a first bandpass filter, which extracts only signals of all the channels of a communications system concerned while filtering out other radio signals. The extracted signals are frequency-converted by using a local oscillation frequency, and only a desired wave is passed by a second bandpass filter. The desired wave is supplied to a sample-and-hold circuit, which performs sampling according to the bandwidth-limiting sampling theorem. A resulting discrete signal is supplied to an I-axis-component and Q-axis-component separating circuits, where the polarity of sample values is inverted for every other clock pulse with respect to each of the I and Q axes to thereby effect Hilbert transform. Resulting two orthogonal components on a phase plane are supplied to a complex coefficient filter.

公开(公告)号：US6026129A

公开(公告)日：2000-02-15

申请号：US824774

申请日：1997-03-26

申请人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Hiroaki Sudo ,  Fujio Sasaki

发明人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Hiroaki Sudo ,  Fujio Sasaki

IPC分类号： H04B1/16 ,  H03D3/00 ,  H04B1/26 ,  H04B1/30 ,  H03D1/22

CPC分类号： H04B1/26 ,  H03D3/009 ,  H04B1/0014 ,  H04B1/0039 ,  H04B1/30 ,  H03D3/006 ,  H03D3/007

摘要： A received signal obtained from an antenna is subjected to high-frequency amplification. The amplified signal is supplied to a first bandpass filter, which extracts only signals of all the channels of a communications system concerned while filtering out other radio signals. The extracted signals are frequency-converted by using a local oscillation frequency, and only a desired wave is passed by a second bandpass filter. The desired wave is supplied to a sample-and-hold circuit, which performs sampling according to the bandwidth-limiting sampling theorem. A resulting discrete signal is supplied to an I-axis-component and Q-axis-component separating circuits, where the polarity of sample values is inverted for every other clock pulse with respect to each of the I and Q axes to thereby effect Hilbert transform. Resulting two orthogonal components on a phase plane are supplied to a complex coefficient filter.

摘要翻译： 从天线获得的接收信号经受高频放大。 放大的信号被提供给第一带通滤波器，其仅提取所涉及的通信系统的所有信道的信号，同时滤除其他无线电信号。 所提取的信号通过使用本地振荡频率进行频率转换，并且只有期望的波通过第二带通滤波器。 将期望的波提供给采样保持电路，该采样保持电路根据带宽限制采样定理进行采样。 得到的离散信号被提供给I轴分量和Q轴分量分离电路，其中样本值的极性相对于I和Q轴中的每一个针对每隔一个时钟脉冲反相，从而实现希尔伯特变换 。 相位平面上产生的两个正交分量被提供给复系数滤波器。

公开(公告)号：US06236688B1

公开(公告)日：2001-05-22

申请号：US09258402

申请日：1999-02-26

申请人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Fujio Sasaki

发明人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Fujio Sasaki

IPC分类号： H03D318

CPC分类号： H04B1/0032 ,  H03D1/2245 ,  H03D7/165 ,  H03D2200/0047 ,  H03D2200/005 ,  H03D2200/0082 ,  H03F3/45475 ,  H03F3/50 ,  H03F2200/537 ,  H04B1/0003 ,  H04B1/123 ,  H04B1/26 ,  H04B5/0093 ,  Y02D70/40 ,  Y02D70/42

摘要： A receiving circuit mainly available in a digital modulation type communication system having a plurality of channels, which is capable of reducing power in a receiving system, simplifying the circuit and reducing the power consumption. Upside and downside frequencies corresponding to a central value between channels are separately supplied from a local frequency signal generating circuit 4 to first and second frequency converting circuits 2, 3 so that two output signals are developed with respect to one of a desired wave, upside channel and downside channel. The desired wave present in common in the first and second frequency converting circuits 2, 3 is extracted in a common wave extracting circuit 5, and a frequency offset of &ohgr;o existing in the output of the common wave extracting circuit 5 is removed a frequency offset circuit 6 and further an unnecessary frequency component is filtered by a filter 8. In addition, the common wave extracting circuit 5 has transformers and, using its inductances, raises the difference between the common wave and the non-common wave within the circuit to more than two times that of a prior art.

摘要翻译： 主要可用于具有多个信道的数字调制型通信系统中的接收电路，其能够降低接收系统的功率，简化电路并降低功耗。 对应于通道之间的中心值的上升和下降频率从本地频率信号发生电路4分别提供给第一和第二频率转换电路2,3，使得两个输出信号相对于所需波形，上行通道 和下行通道。 在公共波提取电路5中提取在第一和第二频率转换电路2,3中共同存在的期望的波，并且公共波提取电路5的输出中存在的ωω的频率偏移被去除频率偏移电路 此外，公共波提取电路5还具有变压器，并且使用其电感将电路内的公共波和非公共波之间的差异提高到超过 是现有技术的两倍。

公开(公告)号：US06516038B1

公开(公告)日：2003-02-04

申请号：US09258419

申请日：1999-02-26

申请人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Fujio Sasaki

发明人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Fujio Sasaki

IPC分类号： H03D318

CPC分类号： H04B1/0032 ,  H03D1/2245 ,  H03D7/165 ,  H03D2200/0047 ,  H03D2200/005 ,  H03D2200/0082 ,  H03F3/45475 ,  H03F3/50 ,  H03F2200/537 ,  H04B1/0003 ,  H04B1/123 ,  H04B1/26 ,  H04B5/0093 ,  Y02D70/40 ,  Y02D70/42

摘要： A receiving circuit mainly available in a digital modulation type communication system having a plurality of channels, which is capable of reducing power in a receiving system, simplifying the circuit and reducing the power consumption. Upside and downside frequencies corresponding to a central value between channels are separately supplied from a local frequency signal generating circuit 4 to first and second frequency converting circuits 2, 3 so that two output signals are developed with respect to one of a desired wave, upside channel and downside channel. The desired wave present in common in the first and second frequency converting circuits 2, 3 is extracted in a common wave extracting circuit 5, and a frequency offset of &ohgr;o existing in the output of the common wave extracting circuit 5 is removed a frequency offset circuit 6 and further an unnecessary frequency component is filtered by a filter 8. In addition, the common wave extracting circuit 5 has transformers and, using its inductances, raises the difference between the common wave and the non-common wave within the circuit to more than two times that of a prior art.

摘要翻译： 主要可用于具有多个信道的数字调制型通信系统中的接收电路，其能够降低接收系统的功率，简化电路并降低功耗。 对应于通道之间的中心值的上升和下降频率从本地频率信号发生电路4分别提供给第一和第二频率转换电路2,3，使得两个输出信号相对于所需波形，上行通道 和下行通道。 在公共波提取电路5中提取在第一和第二频率转换电路2,3中共同存在的期望的波，并且公共波提取电路5的输出中存在的ωω的频率偏移被去除频率偏移电路 此外，公共波提取电路5还具有变压器，并且使用其电感将电路内的公共波和非公共波之间的差异提高到超过 是现有技术的两倍。

公开(公告)号：US06600795B1

公开(公告)日：2003-07-29

申请号：US09258418

申请日：1999-02-26

申请人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Fujio Sasaki

发明人： Gen-ichiro Ohta ,  Kazunori Inogai ,  Fujio Sasaki

IPC分类号： H03D100

CPC分类号： H04B1/0032 ,  H03D1/2245 ,  H03D7/165 ,  H03D2200/0047 ,  H03D2200/005 ,  H03D2200/0082 ,  H03F3/45475 ,  H03F3/50 ,  H03F2200/537 ,  H04B1/0003 ,  H04B1/123 ,  H04B1/26 ,  H04B5/0093 ,  Y02D70/40 ,  Y02D70/42

摘要： A receiving circuit mainly available in a digital modulation type communication system having a plurality of channels, which is capable of reducing power in a receiving system, simplifying the circuit and reducing the power consumption. Upside and downside frequencies corresponding to a central value between channels are separately supplied from a local frequency signal generating circuit 4 to first and second frequency converting circuits 2, 3 so that two output signals are developed with respect to one of a desired wave, upside channel and downside channel. The desired wave present in common in the fist and second frequency converting circuits 2, 3 is extracted in a common wave extracting circuit 5, and a frequency offset of &ohgr;o existing in the output of the common wave extracting circuit 5 is removed a frequency offset circuit 6 and further an unnecessary frequency component is filtered by a filter 8. In addition, the common wave extracting circuit 5 has transformers and, using its inductances, raises the difference between the common wave and the non-common wave within the circuit to more than two times that of a prior art.

摘要翻译： 主要可用于具有多个信道的数字调制型通信系统中的接收电路，其能够降低接收系统的功率，简化电路并降低功耗。 对应于通道之间的中心值的上升和下降频率从本地频率信号发生电路4分别提供给第一和第二频率转换电路2,3，使得两个输出信号相对于所需波形，上行通道 和下行通道。 在公共波提取电路5中提取在第一和第二频率转换电路2,3中共同存在的期望的波，并且公共波提取电路5的输出中存在的ωω的频率偏移被去除频率偏移电路 此外，公共波提取电路5还具有变压器，并且使用其电感将电路内的公共波和非公共波之间的差异提高到超过 是现有技术的两倍。