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    Distortion compensation device
    1.
    发明授权
    Distortion compensation device 失效
    失真补偿装置

    公开(公告)号：US06864745B2

    公开(公告)日：2005-03-08

    申请号：US10687391

    申请日：2003-10-15

    申请人： Takayoshi Ode ,  Yasuyuki Oishi ,  Tokuro Kubo ,  Kazuo Nagatani ,  Hajime Hamada ,  Hiroyoshi Ishikawa ,  Nobukazu Fudaba

    发明人： Takayoshi Ode ,  Yasuyuki Oishi ,  Tokuro Kubo ,  Kazuo Nagatani ,  Hajime Hamada ,  Hiroyoshi Ishikawa ,  Nobukazu Fudaba

    IPC分类号： H03F1/32 ,  H04B1/04 ,  H04B1/62 ,  H04L27/36 ,  H03F1/26

    CPC分类号： H04L27/368 ,  H03F1/3241 ,  H03F1/3247 ,  H03F2201/3233 ,  H04B1/62 ,  H04B2001/0425

    摘要： In a distortion compensation device which uses distortion compensation coefficients to subject distortion compensation processing to an input signal and supply the result of the distortion compensation processing to a distorting device, calculates the distortion compensation coefficients based on the input signal before distortion compensation and the feedback signal fed back from the output side of the distorting device, and stores the calculated distortion compensation coefficients in association with the input signal, (1) the feedback signal is AD-converted; (2) the AD-converted output is subjected to fast Fourier transform (FFT) processing; (3) the FFT calculation result is used to calculate the value of either the signal-to-noise ratio SNR, or the adjacent channel leakage power ratio ACLR, or the noise level; (4) the delay time occurring in the distorting device and feedback loop is adjusted such that the difference between the above calculated value at the current time and the above calculated value at the immediately preceding time is either zero, or is equal to or less than a threshold value; and, (5) this adjustment processing is repeated to determine the accurate delay time, and based on this delay time the timing of each of the portions of the distortion compensation device is adjusted.

    摘要翻译： 在失真补偿装置中，使用失真补偿系数对输入信号进行失真补偿处理，并将失真补偿处理的结果提供给失真装置，基于失真补偿前的输入信号和反馈信号计算失真补偿系数 从失真装置的输出侧反馈，并将计算出的失真补偿系数与输入信号相关联，（1）反馈信号进行AD转换; （2）AD转换输出经受快速傅里叶变换（FFT）处理; （3）FFT计算结果用于计算信噪比SNR或相邻信道泄漏功率比ACLR或噪声电平的值; （4）调整在失真装置和反馈回路中发生的延迟时间，使得当前时间的上述计算值与前一时刻的上述计算值之间的差为零或等于或小于 阈值; 和（5）重复该调整处理以确定准确的延迟时间，并且基于该延迟时间调整失真补偿装置的每个部分的定时。

    Distortion compensating apparatus
    4.
    发明申请
    Distortion compensating apparatus 失效
    失真补偿装置

    公开(公告)号：US20050226346A1

    公开(公告)日：2005-10-13

    申请号：US11149730

    申请日：2005-06-10

    申请人： Takayoshi Ode ,  Yasuyuki Oishi ,  Tokuro Kubo ,  Kazuo Nagatani ,  Hajime Hamada ,  Hiroyoshi Ishikawa

    发明人： Takayoshi Ode ,  Yasuyuki Oishi ,  Tokuro Kubo ,  Kazuo Nagatani ,  Hajime Hamada ,  Hiroyoshi Ishikawa

    IPC分类号： H03F1/32 ,  H03F1/34 ,  H03F3/24 ,  H04J1/00 ,  H04J11/00 ,  H04L27/26 ,  H04L27/36 ,  H04L25/03

    CPC分类号： H03F1/3247 ,  H03F2201/3233

    摘要： Disclosed is a distortion compensating apparatus for correcting the size of a distortion compensation coefficient in such a manner that a transmit signal that has undergone distortion compensation will not exceed the dynamic range of a DA converter. Specifically, before a distortion compensation coefficient hn+1(p) that has been calculated by a calculation unit is stored in a coefficient memory, an assumption is made that distortion compensation will be performed using the distortion compensation coefficient hn+1(p). Then it is determined beforehand whether a signal x(t)*hn+1(p) that will be obtained by this distortion compensation will exceed the limit of a DA converter. If the limit will be exceeded, the size of the distortion compensation coefficient is reduced by a correction unit, the corrected distortion compensation coefficient is stored in the memory and the transmit signal is corrected using the stored distortion compensation coefficient.

    摘要翻译： 公开了一种失真补偿装置，用于以经过失真补偿的发送信号不会超过DA转换器的动态范围的方式校正失真补偿系数的大小。 具体地说，在由计算单元计算出的失真补偿系数h N + 1（p）被存储在系数存储器中之前，假定将使用失真补偿执行失真补偿 系数h n + 1（p）。 然后，预先确定将通过该失真补偿获得的信号x（t）* h N + 1（p）将超过DA转换器的极限。 如果超过极限，则通过校正单元来减小失真补偿系数的大小，将校正的失真补偿系数存储在存储器中，并使用所存储的失真补偿系数校正发送信号。

    Distortion compensating apparatus
    6.
    发明授权
    Distortion compensating apparatus 失效
    失真补偿装置

    公开(公告)号：US07012969B2

    公开(公告)日：2006-03-14

    申请号：US09737196

    申请日：2000-12-14

    申请人： Takayoshi Ode ,  Yasuyuki Oishi ,  Tokuro Kubo ,  Kazuo Nagatani ,  Hajime Hamada ,  Hiroyoshi Ishikawa

    发明人： Takayoshi Ode ,  Yasuyuki Oishi ,  Tokuro Kubo ,  Kazuo Nagatani ,  Hajime Hamada ,  Hiroyoshi Ishikawa

    IPC分类号： H04L25/03

    CPC分类号： H03F1/3247 ,  H03F2201/3233

    摘要： Disclosed is a distortion compensating apparatus for correcting the size of a distortion compensation coefficient in such a manner that a transmit signal that has undergone distortion compensation will not exceed the dynamic range of a DA converter. Specifically, before a distortion compensation coefficient hn+1(p) that has been calculated by a calculation unit is stored in a coefficient memory, an assumption is made that distortion compensation will be performed using the distortion compensation coefficient hn+1(p). Then it is determined beforehand whether a signal x(t)*hn+1(p) that will be obtained by this distortion compensation will exceed the limit of a DA converter. If the limit will be exceeded, the size of the distortion compensation coefficient is reduced by a correction unit, the corrected distortion compensation coefficient is stored in the memory and the transmit signal is corrected using the stored distortion compensation coefficient.

    摘要翻译： 公开了一种失真补偿装置，用于以经过失真补偿的发送信号不会超过DA转换器的动态范围的方式校正失真补偿系数的大小。 具体地说，在由计算单元计算出的失真补偿系数h N + 1（p）被存储在系数存储器中之前，假定将使用失真补偿执行失真补偿 系数h n + 1（p）。 然后，预先确定将通过该失真补偿获得的信号x（t）* h N + 1（p）将超过DA转换器的极限。 如果超过极限，则通过校正单元来减小失真补偿系数的大小，将校正的失真补偿系数存储在存储器中，并使用所存储的失真补偿系数校正发送信号。

    Distortion compensating apparatus
    7.
    发明授权
    Distortion compensating apparatus 有权
    失真补偿装置

    公开(公告)号：US06836517B2

    公开(公告)日：2004-12-28

    申请号：US09745948

    申请日：2000-12-22

    申请人： Kazuo Nagatani ,  Tokuro Kubo ,  Takayoshi Ode ,  Yasuyuki Oishi

    发明人： Kazuo Nagatani ,  Tokuro Kubo ,  Takayoshi Ode ,  Yasuyuki Oishi

    IPC分类号： H04K102

    CPC分类号： H04L27/368 ,  H03F1/3247 ,  H03F1/3288

    摘要： A distortion compensating apparatus for compensating for a distortion of a transmission power amplifier. A delay time decision unit calculates the correlation between a transmission signal and a feedback signal fed back from the output side of the transmission power amplifier while varying phase difference between both signals, and decides the total delay time caused in the transmission power amplifier and a feedback loop on the basis of the phase difference in which the correlation is the maximum. A delay unit delays the transmission signal before a distortion compensation processing by the total delay time, and inputs the delayed signal into a distortion compensating apparatus arithmetic unit, which calculates and stores a distortion compensation coefficient on the basis of the transmission signal and the feedback signal fed back from the output side of the transmission power amplifier. A pre-distortion unit applies a distortion compensation processing to the transmission signal by using the distortion compensation coefficient.

    摘要翻译： 一种用于补偿发射功率放大器的失真的失真补偿装置。 延迟时间决定单元计算发送信号与从发送功率放大器的输出侧反馈的反馈信号之间的相关性，同时改变两个信号之间的相位差，并且确定在发送功率放大器中引起的总延迟时间和反馈 基于相关性最大的相位差进行循环。 延迟单元将失真补偿处理之前的发送信号延迟总延迟时间，并将延迟信号输入失真补偿装置运算单元，该运算单元基于发送信号和反馈信号计算并存储失真补偿系数 从发射功率放大器的输出侧反馈。 预失真单元通过使用失真补偿系数对发送信号应用失真补偿处理。

    Distortion compensating apparatus
    8.
    发明授权
    Distortion compensating apparatus 失效
    失真补偿装置

    公开(公告)号：US07551687B2

    公开(公告)日：2009-06-23

    申请号：US11149730

    申请日：2005-06-10

    申请人： Takayoshi Ode ,  Yasuyuki Oishi ,  Tokuro Kubo ,  Kazuo Nagatani ,  Hajime Hamada ,  Hiroyoshi Ishikawa

    发明人： Takayoshi Ode ,  Yasuyuki Oishi ,  Tokuro Kubo ,  Kazuo Nagatani ,  Hajime Hamada ,  Hiroyoshi Ishikawa

    IPC分类号： H04K1/02

    CPC分类号： H03F1/3247 ,  H03F2201/3233

    摘要： A distortion compensating apparatus for correcting the size of a distortion compensation coefficient in such a manner that a transmit signal that has undergone distortion compensation will not exceed the dynamic range of a DA converter. Specifically, before a distortion compensation coefficient hn+1(p) that has been calculated by a calculation unit is stored in a coefficient memory, an assumption is made that distortion compensation will be performed using the distortion compensation coefficient hn+1(p). Then it is determined beforehand whether a signal x(t)*hn+1(p) that will be obtained by this distortion compensation will exceed the limit of a DA converter. If the limit will be exceeded, the size of the distortion compensation coefficient is reduced by a correction unit, the corrected distortion compensation coefficient is stored in the memory and the transmit signal is corrected using the stored distortion compensation coefficient.

    摘要翻译： 一种失真补偿装置，用于以经过失真补偿的发送信号不会超过DA转换器的动态范围的方式校正失真补偿系数的大小。 具体地说，在由计算单元计算的失真补偿系数hn + 1（p）被存储在系数存储器中之前，假定将使用失真补偿系数hn + 1（p）进行失真补偿。 然后，预先确定将通过该失真补偿获得的信号x（t）* hn + 1（p）是否将超过DA转换器的极限。 如果超过极限，则通过校正单元来减小失真补偿系数的大小，将校正的失真补偿系数存储在存储器中，并使用所存储的失真补偿系数校正发送信号。

    Transmission device and transmission method
    9.
    发明授权
    Transmission device and transmission method 失效
    传输装置及传输方式

    公开(公告)号：US06980604B2

    公开(公告)日：2005-12-27

    申请号：US09973613

    申请日：2001-10-09

    申请人： Tokuro Kubo ,  Takayoshi Ode ,  Kazuo Nagatani ,  Hajime Hamada ,  Hiroyoshi Ishikawa ,  Yasuyuki Oishi ,  Nobukazu Fudaba

    发明人： Tokuro Kubo ,  Takayoshi Ode ,  Kazuo Nagatani ,  Hajime Hamada ,  Hiroyoshi Ishikawa ,  Yasuyuki Oishi ,  Nobukazu Fudaba

    IPC分类号： H03M1/66 ,  H03F1/32 ,  H04B1/04 ,  H04L5/06 ,  H04L27/01 ,  H04L25/49

    CPC分类号： H04L5/06 ,  H03F1/3247

    摘要： The present invention provides a transmission device for predistorting a digital signal in order to compensate distortion, then amplifying and transmitting it. A digital input signal is converted to a first analog signal by a first D/A converter. Separately, the digital input signal is also subjected to predistortion. A compensating signal is then generated from the digital input signal and the predistorted signal. The compensating signal generated thereby is converted into a second analog signal by a second D/A converter. The first analog signal and second analog signal are then added, this addition operation giving a compensated analog transmission signal. This analog transmission signal is supplied to the amplifier for amplification, and then transmitted via an antenna.

    摘要翻译： 本发明提供了一种用于对数字信号进行预失真以便补偿失真，然后进行放大和发送的传输装置。 数字输入信号由第一D / A转换器转换成第一模拟信号。 另外，数字输入信号也经受预失真。 然后从数字输入信号和预失真信号产生补偿信号。 由此生成的补偿信号由第二D / A转换器转换成第二模拟信号。 然后添加第一模拟信号和第二模拟信号，该相加操作给出补偿的模拟传输信号。 该模拟传输信号被提供给放大器用于放大，然后经由天线发送。

    Distortion compensation apparatus and distortion compensation method
    10.
    发明授权
    Distortion compensation apparatus and distortion compensation method 有权
    失真补偿装置和失真补偿方法

    公开(公告)号：US06657493B2

    公开(公告)日：2003-12-02

    申请号：US10116633

    申请日：2002-04-04

    申请人： Takayoshi Ode ,  Yasuyuki Oishi ,  Tokuro Kubo ,  Kazuo Nagatani ,  Hiroyoshi Ishikawa

    发明人： Takayoshi Ode ,  Yasuyuki Oishi ,  Tokuro Kubo ,  Kazuo Nagatani ,  Hiroyoshi Ishikawa

    IPC分类号： H03F126

    CPC分类号： H03F1/3247 ,  H03F1/3294

    摘要： A distortion compensation apparatus returns a part of an amplified output signal of a power amplifier amplifying a transmission signal, reads a distortion compensation signal from a distortion compensation table, multiplies the transmission signal with the distortion compensation signal thereof, and inputs the signal to the power amplifier. The distortion compensation signal corresponding to a signal calculated based on an error signal that is a difference between the transmission signal and the amplified output signal, the distortion compensation signal from the distortion compensation table and the step size parameter, and to a power of the transmission signal. The distortion compensation apparatus comprises a &mgr; control part including a fast Fourier transformation part that obtains a spectrum of the amplified output signal, a calculation part that calculates an adjacent channel leakage power ratio based on the spectrum, and a &mgr; adjusting part that varies the step size parameter by comparing the calculated adjacent leakage power ratio with a threshold value.

    摘要翻译： 失真补偿装置返回放大发送信号的功率放大器的放大输出信号的一部分，从失真补偿表读出失真补偿信号，将发送信号与其失真补偿信号相乘，并将该信号输入到功率 放大器 对应于基于作为发送信号和放大输出信号之间的差的误差信号，来自失真补偿表的失真补偿信号和步长参数而计算出的信号的失真补偿信号，以及发送功率的失真补偿信号 信号。 失真补偿装置包括：mu控制部，包括获取放大的输出信号的频谱的快速傅里叶变换部，基于该频谱计算相邻信道泄漏功率比的计算部;以及改变步骤的mu调整部 通过将计算的相邻泄漏功率比与阈值进行比较来确定尺寸参数。