公开(公告)号：US20100264962A1

公开(公告)日：2010-10-21

申请号：US12826236

申请日：2010-06-29

申请人： Yasuo KITAYAMA ,  Hiroki Kimura ,  Naoki Onishi ,  Nobuo Tsukamoto

发明人： Yasuo KITAYAMA ,  Hiroki Kimura ,  Naoki Onishi ,  Nobuo Tsukamoto

IPC分类号： H03L7/08

CPC分类号： H03L7/093 ,  H03L1/026 ,  H03L7/107 ,  H03L7/1075 ,  H03L7/18 ,  H03L7/189

摘要： A VCO driving circuit and a frequency synthesizer wherein the impedance viewed from a VCO control terminal is reduced to prevent the VCO phase noise characteristic from degrading. A VCO driving circuit and a frequency synthesizer having the VCO driving circuit, which comprises a coarse adjustment DAC that receives a digital data, which has a coarse adjustment frequency, to output an analog signal; a fine adjustment DAC that receives a digital data, which has a fine adjustment frequency, to output an analog signal; a low response speed LPF5 that removes noise from the output signal from the coarse adjustment DAC and then provides the resultant signal as an input to a VCO control terminal; a high response speed LPF7 that converts the output signal from the fine adjustment DAC to a voltage, thereby smoothing the signal; a resistor that connects an input stage of the LPF5 to that of the LPF7; and a capacitor used for providing a capacitive coupling such that the output of the LPF7 is added to that of the LPF5.

摘要翻译： VCO驱动电路和频率合成器，其中从VCO控制端子观察的阻抗减小，以防止VCO相位噪声特性降级。 VCO驱动电路和具有VCO驱动电路的频率合成器，其包括具有粗略调整频率的接收数字数据的粗调DAC以输出模拟信号; 微调DAC，其接收具有微调频率的数字数据，以输出模拟信号; 低响应速度LPF5，其从粗调DAC输出信号中去除噪声，然后将所得到的信号作为输入提供给VCO控制端; 高响应速度LPF7，其将来自微调DAC的输出信号转换为电压，从而平滑信号; 将LPF5的输入级与LPF7的输入级连接的电阻; 以及用于提供电容耦合的电容器，使得LPF7的输出被添加到LPF5的输出。

公开(公告)号：US20090207889A1

公开(公告)日：2009-08-20

申请号：US11817462

申请日：2006-03-02

申请人： Kaoru Kobayashi ,  Nobuo Tsukamoto

发明人： Kaoru Kobayashi ,  Nobuo Tsukamoto

IPC分类号： H04B1/707 ,  H04B1/00

CPC分类号： H04B1/7087

摘要： Provided is a high frequency radio apparatus capable of correcting a frequency of a carrier of the own apparatus in accordance with a frequency of a reception carrier when performing spread spectrum communication using very weak power. A carrier demodulating part demodulates a spread code received from a communication counterpart radio apparatus by using default carrier data, and sends the demodulated spread code to a synchronization timing detecting part. When the synchronization timing detecting part detects the spread code from the carrier demodulated data, a carrier frequency deviation detecting part performs a frequency analysis of the spread code to detect a deviation amount of the carrier frequency. A carrier data generating part generates corrected carrier data based on the detected deviation amount. A DBPSK modulating part uses the corrected carrier data to perform data transmission to the communication counterpart radio apparatus.

摘要翻译： 本发明提供一种高频无线电装置，其能够在使用非常弱的功率进行扩频通信时，根据接收载波的频率来校正本装置的载波的频率。 载波解调部通过使用默认载波数据来解调从通信对方无线装置接收的扩频码，并将解调后的扩频码发送到同步定时检测部。 当同步定时检测部分从载波解调数据中检测到扩频码时，载波频率偏差检测部分对扩频码进行频率分析，以检测载波频率的偏差量。 载波数据生成部基于检测出的偏差量来生成校正后的载波数据。 DBPSK调制部使用经校正的载波数据对通信对方无线电设备执行数据传输。

公开(公告)号：US20090034587A1

公开(公告)日：2009-02-05

申请号：US12213881

申请日：2008-06-25

申请人： Kaoru Kobayashi ,  Shigeru Takegishi ,  Nobuo Tsukamoto

发明人： Kaoru Kobayashi ,  Shigeru Takegishi ,  Nobuo Tsukamoto

IPC分类号： H04B1/69

CPC分类号： H04B1/707

摘要： There is provided a signal processing device and a wireless apparatus capable of not erroneously determining polarity, appropriately performing a spread modulation process, a carrier modulation process, and reception data demodulation process, improving reception accuracy, and miniaturizing a circuit, even when IF carrier frequency shift occurs. The signal processing device and the wireless apparatus includes a spread modulation unit which includes a first differential encoding process section for performing a differential encoding process on a reception data, a differential encoding process section for performing a second differential encoding process on the output, and a spread modulation process section for performing a spread modulation process on the output using a spread code; a carrier modulation unit which quadrature-modulates a transmission data spread modulation signal and a continuous wave; and a reception data decoding unit which performs a correlation process twice and a delay detection process twice.

摘要翻译： 提供一种能够不错误地确定极性的信号处理装置和无线装置，适当地执行扩频调制处理，载波调制处理和接收数据解调处理，提高接收精度，并且使电路小型化，即使在IF载波频率 班次发生。 信号处理装置和无线装置包括扩展调制部，其包括对接收数据进行差分编码处理的第一差分编码处理部，对输出进行第二差分编码处理的差分编码处理部， 扩展调制处理部分，用于使用扩展码对输出进行扩展调制处理; 载波调制单元，对发送数据扩展调制信号和连续波进行正交调制; 以及接收数据解码单元，其执行两次相关处理和延迟检测处理两次。

公开(公告)号：US07242247B2

公开(公告)日：2007-07-10

申请号：US11063998

申请日：2005-02-24

申请人： Nobuo Hirose ,  Nobuo Murata ,  Yasutoshi Tada ,  Nobuo Tsukamoto

发明人： Nobuo Hirose ,  Nobuo Murata ,  Yasutoshi Tada ,  Nobuo Tsukamoto

IPC分类号： H03F1/26

CPC分类号： H03F1/3247 ,  H03F1/3258

摘要： A distortion compensating circuit for a power amplifier attains raised compensating accuracy with shorter convergence time by accurately and quickly generating a distortion compensation signal for pre-distortion. An error signal representing the difference between the input and output signals of the power amplifier is generated. From the error signal and the input signal, the coefficients of the third-order intermodulation distortion, fifth-order intermodulation distortion and seventh-order intermodulation distortion are calculated. According to these coefficients, a distortion compensating signal which is characteristically opposite in phase and gain to the intermodulation distortions is generated.

摘要翻译： 用于功率放大器的失真补偿电路通过精确且快速地产生用于预失真的失真补偿信号，从而提高了具有较短会聚时间的补偿精度。 产生表示功率放大器的输入和输出信号之间的差异的误差信号。 根据误差信号和输入信号，计算三阶互调失真，五阶互调失真和七阶互调失真的系数。 根据这些系数，生成相位特性相反并且互调失真增益的失真补偿信号。

公开(公告)号：US07180368B2

公开(公告)日：2007-02-20

申请号：US10488963

申请日：2003-11-14

申请人： Nobuo Hirose ,  Nobuo Tsukamoto ,  Fumihito Tomaru ,  Seiichi Sano

发明人： Nobuo Hirose ,  Nobuo Tsukamoto ,  Fumihito Tomaru ,  Seiichi Sano

IPC分类号： H03F1/26

CPC分类号： H03F1/3282 ,  H03F1/3247

摘要： A distortion compensating circuit for a power amplifier attains raised compensating accuracy with shorter convergence time by accurately and quickly generating a distortion compensation signal for pre-distortion. An error signal representing the difference between the input and output signals of the power amplifier is generated. From the error signal and the input signal, the coefficients of the third-order intermodulation distortion, fifth-order intermodulation distortion and seventh-order intermodulation distortion are calculated. According to these coefficients, a distortion compensating signal which is characteristically opposite in phase and gain to the intermodulation distortions is generated.

摘要翻译： 用于功率放大器的失真补偿电路通过精确且快速地产生用于预失真的失真补偿信号，从而提高了具有较短会聚时间的补偿精度。 产生表示功率放大器的输入和输出信号之间的差异的误差信号。 根据误差信号和输入信号，计算三阶互调失真，五阶互调失真和七阶互调失真的系数。 根据这些系数，生成相位特性相反并且互调失真增益的失真补偿信号。

公开(公告)号：US20060063489A1

公开(公告)日：2006-03-23

申请号：US11230756

申请日：2005-09-19

申请人： Kazuo Akaike ,  Makoto Okamoto ,  Tsutomu Yamakawa ,  Minoru Fukuda ,  Kozo Ono ,  Nobuo Tsukamoto

发明人： Kazuo Akaike ,  Makoto Okamoto ,  Tsutomu Yamakawa ,  Minoru Fukuda ,  Kozo Ono ,  Nobuo Tsukamoto

IPC分类号： H04B7/00 ,  H04M1/00

CPC分类号： H04B1/30

摘要： A high-frequency wireless communication device is provided that is capable of enlarging the range of communication by enhancing reception sensitivity while avoiding mutual interference. The device comprises an antenna filter and a direct detection type reception mechanism connected to the antenna filter. A crystal filter is used as the antenna filter. A crystal chip constituting the crystal filter and an IC chip into which the reception mechanism is integrated are housed in a single modular container to configure a high-frequency wireless module.

公开(公告)号：US20050184803A1

公开(公告)日：2005-08-25

申请号：US11063998

申请日：2005-02-24

申请人： Nobuo Hirose ,  Nobuo Murata ,  Yasutoshi Tada ,  Nobuo Tsukamoto

发明人： Nobuo Hirose ,  Nobuo Murata ,  Yasutoshi Tada ,  Nobuo Tsukamoto

IPC分类号： H03F1/26 ,  H03F1/32 ,  H03F3/24 ,  H04B1/04 ,  H04J11/00

CPC分类号： H03F1/3247 ,  H03F1/3258

摘要： A distortion compensating circuit for a power amplifier attains raised compensating accuracy with shorter convergence time by accurately and quickly generating a distortion compensation signal for predistortion. An error signal representing the difference between the input and output signals of the power amplifier is generated. From the error signal and the input signal, the coefficients of the third-order intermodulation distortion, fifth-order intermodulation distortion and seventh-order intermodulation distortion are calculated. According to these coefficients, a distortion compensating signal which is characteristically opposite in phase and gain to the intermodulation distortions is generated.

摘要翻译： 用于功率放大器的失真补偿电路通过精确地并且快速地产生用于预失真的失真补偿信号，从而提高了具有较短会聚时间的补偿精度。 产生表示功率放大器的输入和输出信号之间的差异的误差信号。 根据误差信号和输入信号，计算三阶互调失真，五阶互调失真和七阶互调失真的系数。 根据这些系数，生成相位特性相反并且互调失真增益的失真补偿信号。

公开(公告)号：US20050094739A1

公开(公告)日：2005-05-05

申请号：US10941964

申请日：2004-09-16

申请人： Hiroyuki Takesue ,  Tatsuhiro Nakada ,  Nobuo Tsukamoto

发明人： Hiroyuki Takesue ,  Tatsuhiro Nakada ,  Nobuo Tsukamoto

IPC分类号： H04K1/10 ,  H04L27/26

CPC分类号： H04L27/2657 ,  H04L27/2675

摘要： A TMCC carrier is demodulated from a received OFDM signal having a TMCC carrier. A relative carrier position of the demodulated TMCC carrier is detected. A carrier shift amount is detected from the detected relative carrier position of the TMCC carrier and a normal TMCC carrier position. The received OFDM signal is corrected for the carrier frequency shift based on the detected carrier shift amount.

摘要翻译： 从具有TMCC载波的接收的OFDM信号中解调TMCC载波。 检测解调的TMCC载波的相对载波位置。 从检测到的TMCC载波的相对载波位置和正常的TMCC载波位置检测载波移位量。 基于检测到的载波移位量，对载波频移校正接收到的OFDM信号。

公开(公告)号：US06381251B1

公开(公告)日：2002-04-30

申请号：US09096454

申请日：1998-06-11

申请人： Seiichi Sano ,  Toshiyuki Akiyama ,  Atsushi Miyashita ,  Nobuo Tsukamoto

发明人： Seiichi Sano ,  Toshiyuki Akiyama ,  Atsushi Miyashita ,  Nobuo Tsukamoto

IPC分类号： H04J100

CPC分类号： H04L27/2662 ,  H04L27/2602 ,  H04L27/2675

摘要： A data transmission apparatus of an orthogonal frequency multiplex modulation system wherein data is transmitted using a plurality of carriers which are in a mutually orthogonal relationship with one another. The apparatus includes a transmitter which previously inserts a group of predetermined synchronization symbols into an OFDM modulated transmission signal every fixed period and a receiver which demodulates a received OFDM modulated transmission signal to a baseband OFDM signal. In the receiver, an absolute value of an A/D converted digital signal is taken and the signal is bandwidth-limited to a predetermined band width. Then, it is decided whether an amplitude of the signal is larger than or smaller than a predetermined value and a decision result thereof is produced. A null section in the synchronization symbol group is detected on the basis of the decision result and a start point of another synchronization symbol subsequent to the null section is further detected. The time when both of the presence of the null section and the start point of another synchronization symbol are detected is regarded as a synchronization timing and the operation timing of a demodulator for the receiver is set to the synchronization timing.

摘要翻译： 正交频分复用调制系统的数据发送装置，其中使用彼此相互正交的多个载波来发送数据。 该装置包括一个发送器，其先前将一组预定的同步符号插入每个固定周期的OFDM调制的传输信号，以及一个接收机，将接收的OFDM调制的传输信号解调为基带OFDM信号。 在接收机中，采用A / D转换的数字信号的绝对值，并将信号带宽限制在预定的带宽。 然后，确定信号的幅度是否大于或小于预定值，并且产生其判定结果。 基于判定结果来检测同步符号组中的零部分，并进一步检测到零部分之后的另一个同步符号的起始点。 检测到零段的存在和另一个同步符号的起始点的时间被认为是同步定时，并且用于接收机的解调器的操作定时被设置为同步定时。

公开(公告)号：US06246735B1

公开(公告)日：2001-06-12

申请号：US09203564

申请日：1998-12-02

申请人： Seiichi Sano ,  Toshiyuki Akiyama ,  Atsushi Miyashita ,  Nobuo Tsukamoto

发明人： Seiichi Sano ,  Toshiyuki Akiyama ,  Atsushi Miyashita ,  Nobuo Tsukamoto

IPC分类号： H04L706

CPC分类号： H04L27/2656 ,  H04L7/041 ,  H04L27/2613

摘要： A data transmission apparatus using a digital modulation system wherein a transmitting side inserts a group of predetermined synchronization symbols into a transmission signal at predetermined intervals to be transmitted. A receiving side calculates an electric power value of a received transmission signal. When a no-signal period (null section) in the synchronization symbol group is to be detected and decided from a magnitude of the received signal electric power value, a threshold for reference of decision for detecting the null section is calculated on the basis of an average electric power value for a predetermined period in the received signal electric power value and the threshold calculated in accordance with the received signal level of the transmission signal is used to detect synchronization stably.

摘要翻译： 一种使用数字调制系统的数据发送装置，其中发送侧以预定间隔将一组预定同步符号插入到发送信号中以被发送。 接收侧计算接收的发送信号的电功率值。 当从接收信号电功率值的大小检测并确定同步符号组中的无信号周期（空区间）时，基于 使用接收信号电功率值中规定期间的平均电功率值和根据发送信号的接收信号电平计算出的阈值来稳定地检测同步。