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公开(公告)号：US06573864B2
公开(公告)日：2003-06-03
申请号：US10055441
申请日：2001-10-23
申请人： Yukitoshi Sanada , Masayoshi Abe , Ryuji Kohno
发明人： Yukitoshi Sanada , Masayoshi Abe , Ryuji Kohno
IPC分类号： G01S316
摘要： A receiver is provided which can avoid demodulation performance from deteriorating due to changes in circuit constants caused by changes over time and temperature-dependent changes, prevent an increase in the receiver size, and realize a cost reduction. A switch control section is provided to perform control such that an input terminal of one of a plurality of phase varying circuits is selectively connected through a first switch circuit to any of an output terminal of an RF amplifier and a local signal output terminal of a local signal generating circuit, whereby the one phase varying circuit serves as a calibration circuit in the calibration processing that is executed in the non-reception mode. Also, the output terminal of the one phase varying circuit is selectively connected through a second switch circuit or a third switch circuit to any of one input terminal of a signal combiner and a first input terminal of a multi-port junction circuit in a multi-port direct conversion demodulating section.
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公开(公告)号：US06862442B2
公开(公告)日：2005-03-01
申请号：US10039846
申请日：2001-10-23
申请人： Yukitoshi Sanada , Masayoshi Abe , Ryuji Kohno
发明人： Yukitoshi Sanada , Masayoshi Abe , Ryuji Kohno
CPC分类号： H04B7/084 , H04B7/0885
摘要： A receiver includes a phased array antenna and a demodulator. The phased array antenna includes first and second antenna elements and a phase shifter for shifting the phase of a signal received by the first antenna element by a predetermined amount. The demodulator includes a first junction circuit which receives a local signal and a signal output from the phase shifter and which generates a plurality of signals having a phase difference; a second junction circuit which receives a local signal and a signal output from the second antenna element and which generates a plurality of signals having a phase difference; signal combiners for combining corresponding signals output from the two junction circuits; power detectors for detecting the signal levels of the output signals of the signal combiners; and a converter for converting the outputs signals of the power detectors so as to obtain IQ signals.
摘要翻译： 接收机包括相控阵天线和解调器。 相控阵天线包括第一和第二天线元件和移相器，用于将由第一天线元件接收的信号的相位移位预定量。 解调器包括接收本地信号的第一结电路和从移相器输出的信号并产生具有相位差的多个信号; 第二结电路，其接收本地信号和从所述第二天线元件输出的信号，并产生具有相位差的多个信号; 信号组合器，用于组合从两个结电路输出的对应信号; 功率检测器，用于检测信号组合器的输出信号的信号电平; 以及用于转换功率检测器的输出信号以获得IQ信号的转换器。
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公开(公告)号：US06823181B1
公开(公告)日：2004-11-23
申请号：US10070283
申请日：2002-07-23
申请人： Ryuji Kohno , Masayoshi Abe , Noboru Sasho , Shinichiro Haruyama , Robert Henry Morelos-Zaragoza , Francis Swarts , Pieter Van Rooyen , Yukitoshi Sanada , Lachlan Bruce Michael , Hamid Amir-Alikhani , Veselin Brankovic
发明人： Ryuji Kohno , Masayoshi Abe , Noboru Sasho , Shinichiro Haruyama , Robert Henry Morelos-Zaragoza , Francis Swarts , Pieter Van Rooyen , Yukitoshi Sanada , Lachlan Bruce Michael , Hamid Amir-Alikhani , Veselin Brankovic
IPC分类号： H04B126
CPC分类号： H04B1/30 , H03D1/2245 , H04L27/2273 , H04L27/2332
摘要： The universal platform for the SDR of the present invention employs the direct conversion approach with the n-port MMIC followed by reconfigurable reprogrammable devices such as DSP's or FPGA's. The universal platform is based on the linear operation of the devices. Thus, the DC offset problem may be solved. It is also possible to support very wide bandwidths compared with conventional I/Q receivers. Therefore, the present universal platform is suitable for multimode and multiband communications.
摘要翻译： 本发明的SDR的通用平台采用n端口MMIC的直接转换方法，其次是可重新配置的可编程器件，如DSP或FPGA。 通用平台基于设备的线性操作。 因此，可以解决DC偏移问题。 与传统I / Q接收机相比，也可以支持非常宽的带宽。 因此，目前的通用平台适用于多模和多频通信。
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公开(公告)号：US07974363B2
公开(公告)日：2011-07-05
申请号：US11869965
申请日：2007-10-10
申请人： Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Yukitoshi Sanada
发明人： Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Yukitoshi Sanada
CPC分类号： H04B1/0021 , H04B1/28
摘要： A receiver supporting a plurality of radio communication systems having different specifications includes a setting unit, a clock generation circuit, a voltage-current conversion amplifier, a switch, integrators, an AD conversion circuit, and a feedback circuit. The setting unit sets a value suitable for a carrier frequency used in one selected radio communication system. The clock generation circuit generates a first clock having a first frequency and a second clock having a second frequency. The conversion amplifier converts an input voltage signal into a current signal. The switch switches between connection and disconnection modes in accordance with the first clock to output the current signal. Each integrator operates in accordance with the second clock and includes two or more switched capacitor circuits and an operational amplifier. The AD conversion circuit converts a signal supplied from the preceding integrator into digital form. The feedback circuit operates in accordance with the second clock.
摘要翻译： 支持具有不同规格的多个无线电通信系统的接收机包括设置单元，时钟发生电路，电压 - 电流转换放大器，开关，积分器，AD转换电路和反馈电路。 设置单元设置适合于一个所选无线电通信系统中使用的载波频率的值。 时钟产生电路产生具有第一频率的第一时钟和具有第二频率的第二时钟。 转换放大器将输入电压信号转换为电流信号。 该开关根据第一个时钟在连接和断开模式之间切换以输出当前信号。 每个积分器根据第二时钟进行操作，并且包括两个或更多个开关电容器电路和运算放大器。 AD转换电路将从前一积分器提供的信号转换为数字形式。 反馈电路根据第二时钟进行工作。
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公开(公告)号：US07957476B2
公开(公告)日：2011-06-07
申请号：US11747676
申请日：2007-05-11
申请人： Yukitoshi Sanada , Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Mamiko Inamori , Kazuyuki Saijo
发明人： Yukitoshi Sanada , Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Mamiko Inamori , Kazuyuki Saijo
CPC分类号： H04L27/2657 , H04L27/261 , H04L27/2663 , H04L27/2675
摘要： A wireless communication apparatus for receiving a packet formed of a signal modulated by OFDM includes the following elements. A band-pass filter extracts an OFDM signal of a desired band. A low-noise amplifier having a gain controlled according to a received-signal intensity amplifies the desired OFDM signal. A frequency converter down-converts the amplified OFDM signal into a baseband signal. An analog-digital converter converts the baseband signal into a digital signal. A first high-pass filter removes a DC offset from the baseband signal corresponding to a predetermined preamble portion of the packet. A frequency-offset estimator estimates a frequency offset from the sample signals constituting the baseband signal from which the DC offset has been removed by the first high-pass filter. A frequency-offset corrector removes the estimated frequency offset from the baseband signal. A demodulator demodulates subcarrier signals arranged in a frequency domain from the baseband signal compensated for the frequency offset.
摘要翻译： 用于接收由OFDM调制的信号形成的分组的无线通信装置包括以下要素。 带通滤波器提取期望频带的OFDM信号。 具有根据接收信号强度控制的增益的低噪声放大器放大所需的OFDM信号。 变频器将放大的OFDM信号下变频为基带信号。 模拟数字转换器将基带信号转换为数字信号。 第一高通滤波器从对应于分组的预定前同步码部分的基带信号中去除DC偏移。 频率偏移估计器估计构成通过第一高通滤波器去除了DC偏移的基带信号的采样信号的频率偏移。 频偏校正器去除基带信号的估计频偏。 解调器解调从频率补偿的基带信号中排列在频域中的副载波信号。
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公开(公告)号：US20080256157A1
公开(公告)日：2008-10-16
申请号：US11946437
申请日：2007-11-28
IPC分类号： G06F17/10
CPC分类号： H03H17/0621 , H03H17/0685
摘要： An information processing device for processing reception signals converted into digital signals, includes: a first conversion unit for executing sampling rate conversion of each of the digital signals to be computed with each tap coefficient of a K'th-order FIR filter; a filter computing unit for executing computation processing of the K'th order FIR filter on K digital signals each of which have been subjected to sampling rate conversion by the first conversion unit; and a control unit for controlling sampling rate conversion of the digital signals by the first conversion unit, and the computation processing of the K'th order FIR filter by the filter computing unit.
摘要翻译： 一种用于处理被转换为数字信号的接收信号的信息处理装置，包括：第一转换单元，用于对第K级FIR滤波器的每个抽头系数执行的每个待计算的数字信号的采样率转换; 滤波器计算单元，用于对已经由第一转换单元进行了采样率转换的K个数字信号执行第K级FIR滤波器的计算处理; 以及控制单元，用于通过第一转换单元控制数字信号的采样率转换，以及由滤波器计算单元计算第K级FIR滤波器的计算处理。
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公开(公告)号：US20080089443A1
公开(公告)日：2008-04-17
申请号：US11747676
申请日：2007-05-11
申请人： Yukitoshi Sanada , Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Mamiko Inamori , Kazuyuki Saijo
发明人： Yukitoshi Sanada , Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Mamiko Inamori , Kazuyuki Saijo
IPC分类号： H04J11/00
CPC分类号： H04L27/2657 , H04L27/261 , H04L27/2663 , H04L27/2675
摘要： A wireless communication apparatus for receiving a packet formed of a signal modulated by OFDM includes the following elements. A band-pass filter extracts an OFDM signal of a desired band. A low-noise amplifier having a gain controlled according to a received-signal intensity amplifies the desired OFDM signal. A frequency converter down-converts the amplified OFDM signal into a baseband signal. An analog-digital converter converts the baseband signal into a digital signal. A first high-pass filter removes a DC offset from the baseband signal corresponding to a predetermined preamble portion of the packet. A frequency-offset estimator estimates a frequency offset from the sample signals constituting the baseband signal from which the DC offset has been removed by the first high-pass filter. A frequency-offset corrector removes the estimated frequency offset from the baseband signal. A demodulator demodulates subcarrier signals arranged in a frequency domain from the baseband signal compensated for the frequency offset.
摘要翻译： 用于接收由OFDM调制的信号形成的分组的无线通信装置包括以下要素。 带通滤波器提取期望频带的OFDM信号。 具有根据接收信号强度控制的增益的低噪声放大器放大所需的OFDM信号。 变频器将放大的OFDM信号下变频为基带信号。 模拟数字转换器将基带信号转换为数字信号。 第一高通滤波器从对应于分组的预定前同步码部分的基带信号中去除DC偏移。 频率偏移估计器估计构成通过第一高通滤波器去除了DC偏移的基带信号的采样信号的频率偏移。 频偏校正器去除基带信号的估计频偏。 解调器解调从频率补偿的基带信号中排列在频域中的副载波信号。
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公开(公告)号：US20080025440A1
公开(公告)日：2008-01-31
申请号：US11780929
申请日：2007-07-20
申请人： Yukitoshi SANADA , Hideki Yokoshima , Masayoshi Abe , Yuya Kondo
发明人： Yukitoshi SANADA , Hideki Yokoshima , Masayoshi Abe , Yuya Kondo
CPC分类号： H04B7/0845 , H04B1/70757 , H04B1/7115
摘要： A receiving device including channel signal output means for sampling a received signal at a sampling rate switched one of in a predetermined range and between a plurality of values and outputting a channel signal, control means for controlling the sampling rate in the channel signal output means, response estimation means for estimating a response based on the channel signal output by the channel signal output means, evaluation means for evaluating a reception characteristic based on an estimation result of the response by the response estimation means, and determination means for determining the sampling rate in the channel signal output means based on an evaluation of the reception characteristic at a plurality of sampling rates by the evaluation means.
摘要翻译： 一种接收装置，包括：信道信号输出装置，用于以切换预定范围中的一个并在多个值之间的采样率对接收到的信号进行采样，并输出信道信号;控制装置，用于控制信道信号输出装置中的采样率， 响应估计装置，用于基于由信道信号输出装置输出的信道信号来估计响应;评估装置，用于基于响应估计装置的响应的估计结果来评估接收特性;以及确定装置，用于确定采样率 信道信号输出装置基于评估装置对多个采样率的接收特性的评估。
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公开(公告)号：US08346834B2
公开(公告)日：2013-01-01
申请号：US11946437
申请日：2007-11-28
IPC分类号： G06F17/10
CPC分类号： H03H17/0621 , H03H17/0685
摘要： An information processing device for processing reception signals converted into digital signals, includes: a first conversion unit for executing sampling rate conversion of each of the digital signals to be computed with each tap coefficient of a K'th-order FIR filter; a filter computing unit for executing computation processing of the K'th order FIR filter on K digital signals each of which have been subjected to sampling rate conversion by the first conversion unit; and a control unit for controlling sampling rate conversion of the digital signals by the first conversion unit, and the computation processing of the K'th order FIR filter by the filter computing unit.
摘要翻译： 一种用于处理被转换为数字信号的接收信号的信息处理装置，包括：第一转换单元，用于对第K级FIR滤波器的每个抽头系数执行的每个待计算的数字信号的采样率转换; 滤波器计算单元，用于对已经由第一转换单元进行了采样率转换的K个数字信号执行第K级FIR滤波器的计算处理; 以及控制单元，用于通过第一转换单元控制数字信号的采样率转换，以及由滤波器计算单元计算第K级FIR滤波器的计算处理。
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10.发明授权公开(公告)号：US07835433B2
公开(公告)日：2010-11-16
申请号：US11871013
申请日：2007-10-11
申请人： Yukitoshi Sanada , Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Mario Tokoro
发明人： Yukitoshi Sanada , Hideki Yokoshima , Masayoshi Abe , Yuya Kondo , Mario Tokoro
IPC分类号： H03H7/30
CPC分类号： H04B1/70757
摘要： A receiver apparatus is disclosed. The receiver apparatus includes a plurality of signal receiving devices and a plurality of channel signal outputting devices for sampling signals received by the signal receiving devices at sampling rates switched within a predetermined range or between multiple values and outputting channel signals. The receiver apparatus also includes control devices for controlling the sampling rates in the channel signal outputting devices. The receiver apparatus also includes response estimating devices for estimating responses on the basis of the channel signals output from the channel signal outputting devices. The receiver apparatus also includes evaluating devices for evaluating reception characteristics on the basis of the responses estimated by the response estimating devices. The receiver apparatus further includes determining devices for determining the sampling rates in the channel signal outputting devices on the basis of the reception characteristics at the multiple sampling rates evaluated by the evaluating devices.
摘要翻译： 公开了一种接收装置。 接收机装置包括多个信号接收装置和多个信道信号输出装置，用于以在预定范围内或多个值之间切换的采样速率对信号接收装置接收的信号进行采样，并输出信道信号。 接收机装置还包括用于控制信道信号输出装置中的采样率的控制装置。 接收机装置还包括用于基于从信道信号输出装置输出的信道信号来估计响应的响应估计装置。 接收机装置还包括基于由响应估计装置估计的响应来评估接收特性的评估装置。 接收机装置还包括基于由评估装置评估的多个采样率的接收特性，确定用于确定信道信号输出装置中的采样率的装置。
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