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1. 发明授权

US07817746B2 Peak factor reduction unit and baseband signal processing device 有权
标题翻译：峰值因子降低单元和基带信号处理装置
公开(公告)号：US07817746B2
公开(公告)日：2010-10-19
申请号：US11829405
申请日：2007-07-27
申请人： Kazuyuki Hori , Hideaki Arai , Shouhei Murakami
发明人： Kazuyuki Hori , Hideaki Arai , Shouhei Murakami
IPC分类号： H04L25/03
CPC分类号： H04B1/707 , H04B2201/70706 , H04L27/2624
摘要： A peak factor reduction unit that never allow peak factor reproduction even when interpolation is done in a succeeding stage. The unit detects a local maximum value of amplitude components from an input complex signal and supplies a complex signal that passes a band limiting baseband filter and an interpolation filter to a correction signal generation unit for generating a correction signal used for peak factor reduction and reduces a peak factor of the input complex signal with use of the correction signal generated from an interpolated complex signal.
摘要翻译：峰值因子降低单元，即使在后续阶段进行插值，也不允许峰值因子再现。该单元从输入复合信号中检测振幅分量的局部最大值，并将通过带限基带滤波器和内插滤波器的复信号提供给校正信号生成单元，用于产生用于峰值因子减小的校正信号，并减少使用从内插复数信号生成的校正信号的输入复信号的峰值因子。

2. 发明申请

US20080095284A1 PEAK FACTOR REDUCTION UNIT AND BASEBAND SIGNAL PROCESSING DEVICE 有权
标题翻译：峰值因子减少单元和基带信号处理装置
公开(公告)号：US20080095284A1
公开(公告)日：2008-04-24
申请号：US11829405
申请日：2007-07-27
申请人： Kazuyuki HORI , Hideaki Arai , Shouhei Murakami
发明人： Kazuyuki HORI , Hideaki Arai , Shouhei Murakami
IPC分类号： H04B1/10
CPC分类号： H04B1/707 , H04B2201/70706 , H04L27/2624
摘要： A peak factor reduction unit that never allow peak factor reproduction even when interpolation is done in a succeeding stage. The unit detects a local maximum value of amplitude components from an input complex signal and supplies a complex signal that passes a band limiting baseband filter and an interpolation filter to a correction signal generation unit for generating a correction signal used for peak factor reduction and reduces a peak factor of the input complex signal with use of the correction signal generated from an interpolated complex signal.
摘要翻译：峰值因子降低单元，即使在后续阶段进行插值，也不允许峰值因子再现。该单元从输入复合信号中检测振幅分量的局部最大值，并将通过带限基带滤波器和内插滤波器的复信号提供给校正信号生成单元，用于产生用于峰值因子减小的校正信号，并减少使用从内插复数信号生成的校正信号的输入复信号的峰值因子。

3. 发明授权

US07352316B2 Time-interleaved AD converter 失效
标题翻译：时间交错AD转换器
公开(公告)号：US07352316B2
公开(公告)日：2008-04-01
申请号：US11602355
申请日：2006-11-21
申请人： Kazuyuki Hori , Yuji Ishida , Toshiaki Kurokawa , Keiichi Hirota , Shouhei Murakami
发明人： Kazuyuki Hori , Yuji Ishida , Toshiaki Kurokawa , Keiichi Hirota , Shouhei Murakami
IPC分类号： H03M1/12
CPC分类号： H03M1/0626 , H03M1/1215
摘要： In a time-interleaved AD converter which combines together low-speed high-resolution AD converters for effective high speed operation, various deterioration factors possessed by each of the converters, including DC offset, conversion gain error, sampling timing error, and a frequency characteristic, need to be compensated. The compensation is performed through nonlinear filter operation in which a constant term is added to linear filter operation. A high-speed low-resolution AD converter is separately used, and through adaptive signal processing in which an output signal thereof is defined as an instruction signal, a compensation coefficient is calculated. In this condition, the compensation can be performed without the influence of quantization noise attributable to the high-speed low-resolution AD converter.
摘要翻译：在将低速高分辨率AD转换器组合在一起的有效高速运行的时间交织的AD转换器中，每个转换器所具有的各种劣化因素包括DC偏移，转换增益误差，采样定时误差和频率特性，需要补偿。通过非线性滤波器操作进行补偿，其中将常数项添加到线性滤波器操作。单独使用高速低分辨率AD转换器，并且通过将其输出信号定义为指令信号的自适应信号处理，计算补偿系数。在这种情况下，可以在不受归因于高速低分辨率AD转换器的量化噪声的影响的情况下进行补偿。

4. 发明申请

US20110096865A1 Digital predistortion transmitter 有权
公开(公告)号：US20110096865A1
公开(公告)日：2011-04-28
申请号：US12929083
申请日：2010-12-29
申请人： Kazuyuki Hori , Shouhei Murakami , Yuji Ishida , Tomoya Uchiike , Yoshiaki Hasegawa
发明人： Kazuyuki Hori , Shouhei Murakami , Yuji Ishida , Tomoya Uchiike , Yoshiaki Hasegawa
IPC分类号： H04L27/04
CPC分类号： H04L27/368 , H03F1/3247 , H03F1/3258
摘要： There is a need for effectively compensating distortion when a predistortion transmitter is subject to not only a memory effect due to nonlinearity of an amplifier, but also a modulator's DC offset, IQ unbalance, or local quadrature error. A predistortor to be used is a polynomial predistortor including a polynomial basis generation portion and an inner product calculation portion. The polynomial basis generation portion delays a real part and an imaginary part of a complex input signal Sx=Ix+jQx for up to M samples to generate 2(M+1) signals, duplicately combines these signals to generate monomials having maximum degree N, and outputs, as a basis vector, all or part of the monomials depending or needs. The inner product calculation portion performs an inner product calculation using a coefficient vector, i.e., a set of complex numbers sized equally to the basis vector to find a polynomial value and outputs the value as a complex signal.

5. 发明申请

US20080219372A1 OFDM MODULATOR 有权
标题翻译： OFDM调制器
公开(公告)号：US20080219372A1
公开(公告)日：2008-09-11
申请号：US12027035
申请日：2008-02-06
申请人： Kazuyuki Hori , Yuji Ishida , Shouhei Murakami , Kenji Yanagi
发明人： Kazuyuki Hori , Yuji Ishida , Shouhei Murakami , Kenji Yanagi
IPC分类号： H04L5/12
CPC分类号： H04L27/2614 , H04L27/2624
摘要： An OFDM modulator having a peak factor reduction function. The OFDM modulator has a peak factor reduction unit between an IFFT unit and a guard interval insertion unit thereof. The peak factor reduction unit converts a complex signal X1 outputted from the IFFT unit into a complex signal X2 with a reduced peak factor based on subcarrier map information. The peak factor reduction unit generates a peak factor reduction signal by a linear combination of complex exponential functions that correspond to subcarrier frequencies to be used for wave transmission, as bases. The peak factor reduction signal is derived by repetition of, for example, a weighted least squares method or convolution processing by a fast Fourier transform.
摘要翻译：一种具有峰值因子减小函数的OFDM调制器。 OFDM调制器在IFFT单元与其保护间隔插入单元之间具有峰值因子减小单元。峰值因子降低单元基于副载波映射信息将从IFFT单元输出的复信号X 1以具有降低的峰值因子的复信号X 2转换。峰值因子降低单元通过对应于用于波传输的副载波频率的复指数函数的线性组合作为基础产生峰值因子减小信号。通过重复例如加权最小二乘法或快速傅里叶变换的卷积处理来导出峰值因子降低信号。

6. 发明授权

US07995674B2 Digital predistortion transmitter 有权
标题翻译：数字预失真发射机
公开(公告)号：US07995674B2
公开(公告)日：2011-08-09
申请号：US12929083
申请日：2010-12-29
申请人： Kazuyuki Hori , Shouhei Murakami , Yuji Ishida , Tomoya Uchiike , Yoshiaki Hasegawa
发明人： Kazuyuki Hori , Shouhei Murakami , Yuji Ishida , Tomoya Uchiike , Yoshiaki Hasegawa
IPC分类号： H04L25/49 , H03C1/06
CPC分类号： H04L27/368 , H03F1/3247 , H03F1/3258
摘要： There is a need for effectively compensating distortion when a predistortion transmitter is subject to not only a memory effect due to nonlinearity of an amplifier, but also a modulator's DC offset, IQ unbalance, or local quadrature error. A predistortor to be used is a polynomial predistortor including a polynomial basis generation portion and an inner product calculation portion. The polynomial basis generation portion delays a real part and an imaginary part of a complex input signal Sx=Ix+jQx for up to M samples to generate 2(M+1) signals, duplicately combines these signals to generate monomials having maximum degree N, and outputs, as a basis vector, all or part of the monomials depending or needs. The inner product calculation portion performs an inner product calculation using a coefficient vector, i.e., a set of complex numbers sized equally to the basis vector to find a polynomial value and outputs the value as a complex signal.
摘要翻译：当预失真发射机不仅由于放大器的非线性而受到存储器影响，而且还涉及调制器的DC偏移，IQ不平衡或局部正交误差时，需要有效地补偿失真。要使用的预失真器是包括多项式基础生成部分和内积计算部分的多项式预失真器。多项式基产生部分将复数输入信号Sx = Ix + jQx的实部和虚部延迟最多M个样本以产生2（M + 1）个信号，将这些信号重复组合以产生具有最大度N的单项式，并作为基本向量输出依赖或需要的全部或部分单项式。内积计算部分使用系数向量，即与基矢量相等的一组复数来执行内积计算，以找到多项式值，并输出该值作为复信号。

7. 发明授权

US07864881B2 Digital predistortion transmitter 有权
公开(公告)号：US07864881B2
公开(公告)日：2011-01-04
申请号：US11703768
申请日：2007-02-08
申请人： Kazuyuki Hori , Shouhei Murakami , Yuji Ishida , Tomoya Uchiike , Yoshiaki Hasegawa
发明人： Kazuyuki Hori , Shouhei Murakami , Yuji Ishida , Tomoya Uchiike , Yoshiaki Hasegawa
IPC分类号： H04L25/49
CPC分类号： H04L27/368 , H03F1/3247 , H03F1/3258
摘要： There is a need for effectively compensating distortion when a predistortion transmitter is subject to not only a memory effect due to nonlinearity of an amplifier, but also a modulator's DC offset, IQ unbalance, or local quadrature error. A predistortor to be used is a polynomial predistortor including a polynomial basis generation portion and an inner product calculation portion. The polynomial basis generation portion delays a real part and an imaginary part of a complex input signal Sx=Ix+jQx for up to M samples to generate 2(M+1) signals, duplicately combines these signals to generate monomials having maximum degree N, and outputs, as a basis vector, all or part of the monomials depending or needs. The inner product calculation portion performs an inner product calculation using a coefficient vector, i.e., a set of complex numbers sized equally to the basis vector to find a polynomial value and outputs the value as a complex signal.

8. 发明授权

US07809078B2 OFDM modulator 有权
标题翻译： OFDM调制器
公开(公告)号：US07809078B2
公开(公告)日：2010-10-05
申请号：US12027035
申请日：2008-02-06
申请人： Kazuyuki Hori , Yuji Ishida , Shouhei Murakami , Kenji Yanagi
发明人： Kazuyuki Hori , Yuji Ishida , Shouhei Murakami , Kenji Yanagi
IPC分类号： H04L27/00 , H04L25/03 , H04L27/36 , H04J11/00
CPC分类号： H04L27/2614 , H04L27/2624
摘要： An OFDM modulator having a peak factor reduction function. The OFDM modulator has a peak factor reduction unit between an IFFT unit and a guard interval insertion unit thereof. The peak factor reduction unit converts a complex signal X1 outputted from the IFFT unit into a complex signal X2 with a reduced peak factor based on subcarrier map information. The peak factor reduction unit generates a peak factor reduction signal by a linear combination of complex exponential functions that correspond to subcarrier frequencies to be used for wave transmission, as bases. The peak factor reduction signal is derived by repetition of, for example, a weighted least squares method or convolution processing by a fast Fourier transform.
摘要翻译：一种具有峰值因子减小函数的OFDM调制器。 OFDM调制器在IFFT单元与其保护间隔插入单元之间具有峰值因子减小单元。峰值因子降低单元基于子载波映射信息将从IFFT单元输出的复信号X1转换为具有降低的峰值因子的复信号X2。峰值因子降低单元通过对应于用于波传输的副载波频率的复指数函数的线性组合作为基础产生峰值因子减小信号。通过重复例如加权最小二乘法或快速傅里叶变换的卷积处理来导出峰值因子降低信号。

9. 发明申请

US20070237260A1 Digital predistortion transmitter 有权
标题翻译：数字预失真发射机
公开(公告)号：US20070237260A1
公开(公告)日：2007-10-11
申请号：US11703768
申请日：2007-02-08
申请人： Kazuyuki Hori , Shouhei Murakami , Yuji Ishida , Tomoya Uchiike , Yoshiaki Hasegawa
发明人： Kazuyuki Hori , Shouhei Murakami , Yuji Ishida , Tomoya Uchiike , Yoshiaki Hasegawa
IPC分类号： H04L25/49
CPC分类号： H04L27/368 , H03F1/3247 , H03F1/3258
摘要： There is a need for effectively compensating distortion when a predistortion transmitter is subject to not only a memory effect due to nonlinearity of an amplifier, but also a modulator's DC offset, IQ unbalance, or local quadrature error. A predistortor to be used is a polynomial predistortor including a polynomial basis generation portion and an inner product calculation portion. The polynomial basis generation portion delays a real part and an imaginary part of a complex input signal Sx=Ix+jQx for up to M samples to generate 2 (M+1) signals, duplicately combines these signals to generate monomials having maximum degree N, and outputs, as a basis vector, all or part of the monomials depending or needs. The inner product calculation portion performs an inner product calculation using a coefficient vector, i.e., a set of complex numbers sized equally to the basis vector to find a polynomial value and outputs the value as a complex signal.
摘要翻译：当预失真发射机不仅由于放大器的非线性而受到存储器影响，而且还涉及调制器的DC偏移，IQ不平衡或局部正交误差时，需要有效地补偿失真。要使用的预失真器是包括多项式基础生成部分和内积计算部分的多项式预失真器。多项式基产生部分将复数输入信号Sx = Ix + jQx的实部和虚部延迟最多M个样本以产生2（M + 1）个信号，将这些信号重复组合以产生具有最大度N的单项式，并作为基本向量输出依赖或需要的全部或部分单项式。内积计算部分使用系数向量，即与基矢量相等的一组复数来执行内积计算，以找到多项式值，并输出该值作为复信号。

10. 发明申请

US20070120724A1 Time-interleaved AD converter 失效
标题翻译：时间交错AD转换器
公开(公告)号：US20070120724A1
公开(公告)日：2007-05-31
申请号：US11602355
申请日：2006-11-21
申请人： Kazuyuki Hori , Yuji Ishida , Toshiaki Kurokawa , Keiichi Hirota , Shouhei Murakami
发明人： Kazuyuki Hori , Yuji Ishida , Toshiaki Kurokawa , Keiichi Hirota , Shouhei Murakami
IPC分类号： H03M1/12
CPC分类号： H03M1/0626 , H03M1/1215
摘要： In a time-interleaved AD converter which combines together low-speed high-resolution AD converters for effective high speed operation, various deterioration factors possessed by each of the converters, including DC offset, conversion gain error, sampling timing error, and a frequency characteristic, need to be compensated. The compensation is performed through nonlinear filter operation in which a constant term is added to linear filter operation. A high-speed low-resolution AD converter is separately used, and through adaptive signal processing in which an output signal thereof is defined as an instruction signal, a compensation coefficient is calculated. In this condition, the compensation can be performed without the influence of quantization noise attributable to the high-speed low-resolution AD converter.
摘要翻译：在将低速高分辨率AD转换器组合在一起的有效高速运行的时间交织的AD转换器中，每个转换器所具有的各种劣化因素包括DC偏移，转换增益误差，采样定时误差和频率特性，需要补偿。通过非线性滤波器操作进行补偿，其中将常数项添加到线性滤波器操作。单独使用高速低分辨率AD转换器，并且通过将其输出信号定义为指令信号的自适应信号处理，计算补偿系数。在这种情况下，可以在不受归因于高速低分辨率AD转换器的量化噪声的影响的情况下进行补偿。

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