公开(公告)号：US07688914B2

公开(公告)日：2010-03-30

申请号：US11319046

申请日：2005-12-27

Applicant: Takeshi Ohba ,  Yasuhito Funyu ,  Hideharu Shako

Inventor： Takeshi Ohba ,  Yasuhito Funyu ,  Hideharu Shako

IPC: H04L25/49 ,  H03C1/06

CPC classification number: H04L27/368 ,  H03F1/3247 ,  H04L27/364 ,  H04L2027/0016

Abstract: A distortion compensating technique applied to a transmitter for transmitting a quadrature modulated signal in a wireless digital communication system is provided. A phase adjustment value is determined for a quadrature demodulated feedback signal based on comparison between the feedback signal and a reference signal to be transmitted from the transmitter. This phase adjustment value is compared with the previous phase adjustment value. If the comparison result between the current and previous phase adjustment values satisfies a prescribed condition, correction for quadrature modulation, such as DC offset correction, orthogonality correction, or IQ amplitude correction, is performed.

Abstract translation: 提供了一种应用于在无线数字通信系统中发送正交调制信号的发射机的失真补偿技术。 基于反馈信号和要从发射机发射的参考信号之间的比较，确定正交解调反馈信号的相位调整值。 该相位调整值与先前的相位调整值进行比较。 如果当前和前一相位调整值之间的比较结果满足规定条件，则执行诸如DC偏移校正，正交校正或IQ振幅校正之类的正交调制的校正。

公开(公告)号：US07466762B2

公开(公告)日：2008-12-16

申请号：US11107851

申请日：2005-04-18

Applicant: Hideharu Shako ,  Yasuhito Funyu ,  Takeshi Ohba

Inventor： Hideharu Shako ,  Yasuhito Funyu ,  Takeshi Ohba

IPC: H04L25/49

CPC classification number: H04L27/368

Abstract: A distortion compensation apparatus shortens the time until start of the transmission. The distortion compensating apparatus for amplifying the transmitted signal after implementation of the distortion compensation process thereto comprises a coefficient memory operable to store coefficients used for the distortion compensation process, an initial value memory operable to store the initial values of the coefficients, and a controller which controls the coefficient memory to store, with limitation, only the coefficients corresponding to the first portion among those stored in the initial value memory for the initial write to the coefficient memory and to store thereafter the coefficients corresponding to the second portion.

Abstract translation: 失真补偿装置缩短直到开始发送的时间。 用于在实施失真补偿处理之后放大发送信号的失真补偿装置包括可操作以存储用于失真补偿处理的系数的系数存储器，可操作以存储系数的初始值的初始值存储器，以及控制器， 控制系数存储器，仅限于存储在初始值存储器中的那些对应于第一部分的系数用于对系数存储器的初始写入，并且此后存储对应于第二部分的系数。

公开(公告)号：US07433421B2

公开(公告)日：2008-10-07

申请号：US11147462

申请日：2005-06-08

Applicant: Hideharu Shako ,  Yasuhito Funyu ,  Takeshi Ohba

Inventor： Hideharu Shako ,  Yasuhito Funyu ,  Takeshi Ohba

IPC: H04L25/49

CPC classification number: H04L27/368 ,  H03F1/3247

Abstract: A distortion compensation apparatus is provided to restrain an increased calculation time caused by a large amount of calculation required for obtaining a phase variation amount for compensation from the correlation. The distortion compensation apparatus includes an update calculation section calculating a distortion compensation coefficient by use of an adaptive algorithm; a distortion compensation section performing distortion compensation to the transmission signal, based on the distortion compensation coefficient being read out from the distortion compensation coefficient storage; a correlation calculation section calculating a real part of correlation and an imaginary part of correlation of each the reference signal and the feedback signal; and a phase rotation section compensating a relative phase deviation between the reference signal and the feedback signal, based on the real part of correlation and the imaginary part of correlation calculated by the correlation calculation section, wherein the update calculation section calculates a distortion compensation coefficient using the post-compensation signal.

Abstract translation: 提供了一种失真补偿装置，用于抑制从相关性获得用于补偿的相位变化量所需的大量计算所引起的增加的计算时间。 失真补偿装置包括：更新计算部，利用自适应算法计算失真补偿系数; 基于从失真补偿系数存储器读出的失真补偿系数，对发送信号进行失真补偿的失真补偿部; 相关计算部分，计算每个参考信号和反馈信号的相关的实部和相关的虚部; 以及相位旋转部，其基于由所述相关计算部计算出的相关的实部和所述相关的虚部，补偿所述参考信号和所述反馈信号之间的相对相位偏差，其中，所述更新计算部使用 后补偿信号。

公开(公告)号：US07418057B2

公开(公告)日：2008-08-26

申请号：US11113043

申请日：2005-04-25

Applicant: Hideharu Shako ,  Yasuhito Funyu ,  Takeshi Ohba

Inventor： Hideharu Shako ,  Yasuhito Funyu ,  Takeshi Ohba

IPC: H04L25/49

CPC classification number: H03F1/3247

Abstract: To shorten the time required for writing of the distortion compensation coefficient and to reduce amount of data of the distortion compensation coefficient stored as the initial value of the distortion compensation apparatus. The distortion compensation apparatus for amplifying the transmitting signal after implementing the distortion compensation process comprises a coefficient memory for storing corresponding to each address the coefficient used for the distortion compensation process, an initial value memory for storing the initial value of the coefficient, and a controller for write control corresponding to n (n: natural number equal to 2 or larger) addresses of the coefficient read from the initial value memory corresponding to one address.

Abstract translation: 缩短写入失真补偿系数所需的时间并减少作为失真补偿装置的初始值存储的失真补偿系数的数据量。 用于在实施失真补偿处理之后放大发送信号的失真补偿装置包括用于存储对应于每个地址的用于失真补偿处理的系数的系数存储器，用于存储系数的初始值的初始值存储器，以及控制器 对应于从对应于一个地址的初始值存储器读取的系数的n（n：等于2或更大的自然数）的地址的写入控制。

公开(公告)号：US20080111723A1

公开(公告)日：2008-05-15

申请号：US12016354

申请日：2008-01-18

Applicant: Hideharu Shako ,  Yasuhito Funyu ,  Takeshi Ohba

Inventor： Hideharu Shako ,  Yasuhito Funyu ,  Takeshi Ohba

IPC: H03M1/10

CPC classification number: H04L25/061 ,  H03M1/1019 ,  H03M1/66 ,  H04B1/30 ,  H04L25/06 ,  H04L27/364

Abstract: A reference signal and a feedback signal are written to memory and the state of a power value of a reference signal is used for judging whether the current signal is in a normal state, burst state, non-modulation state or no-wave transmission state. If the state is judged to be the burst state or no-wave transmission state, a DC offset correction is performed by selecting a feedback signal type DC offset correction method in which a DC offset is corrected by using only a feedback signal. If the state is judged to be the normal state or non-modulation state, a DC offset correction is performed by selecting a reference signal type DC offset correction method in which a DC offset is corrected by using a differential signal between the reference signal and feedback signal.

Abstract translation: 将参考信号和反馈信号写入存储器，并且使用参考信号的功率值的状态来判断当前信号是处于正常状态，脉冲串状态，非调制状态还是无波传输状态。 如果状态被判断为突发状态或无波传输状态，则通过选择仅通过使用反馈信号校正DC偏移的反馈信号型DC偏移校正方法来执行DC偏移校正。 如果状态被判断为正常状态或非调制状态，则通过选择参考信号型DC偏移校正方法来执行DC偏移校正，其中通过使用参考信号和反馈之间的差分信号校正DC偏移 信号。

公开(公告)号：US20070030920A1

公开(公告)日：2007-02-08

申请号：US11268652

申请日：2005-11-08

Applicant: Yasuhito Funyu ,  Takeshi Ohba ,  Hideharu Shako

Inventor： Yasuhito Funyu ,  Takeshi Ohba ,  Hideharu Shako

IPC: H04L25/03

CPC classification number: H03F1/3247 ,  H03F2201/3233

Abstract: An address frequency operation unit counts frequencies of occurrences of addresses output by an address conversion unit 14, and a CPU 16 rewrites an address conversion table in the address conversion unit 14 based on a comparison between the counted result and a threshold value. When the frequency of the address is lower than the threshold value, the frequency of occurrence of an output address is increased by increasing the number of input addresses corresponding to one output address. Also, distortion in an output signal which is fed back is detected and the address conversion table is rewritten so that the distortion is decreased.

Abstract translation: 地址频率操作单元对由地址转换单元14输出的地址的出现频率进行计数，并且CPU16基于计数结果和阈值之间的比较来重写地址转换单元14中的地址转换表。 当地址的频率低于阈值时，通过增加对应于一个输出地址的输入地址的数量来增加输出地址的出现频率。 此外，检测反馈的输出信号的失真，并且改写地址转换表，使得失真减小。

公开(公告)号：US20060215783A1

公开(公告)日：2006-09-28

申请号：US11188782

申请日：2005-07-26

Applicant: Hideharu Shako ,  Yasuhito Funyu ,  Takeshi Ohba

Inventor： Hideharu Shako ,  Yasuhito Funyu ,  Takeshi Ohba

IPC: H04L25/03

CPC classification number: H04L27/368 ,  H03F1/3241 ,  H03F1/3294 ,  H03F2200/321 ,  H03F2200/336 ,  H03F2201/3233 ,  H04B2001/0425

Abstract: A step size parameter μ is adaptively varied when a distortion compensation coefficient is calculated in a distortion compensation apparatus, relation between transmission signal level and step size parameter μ is considered. The distortion compensation apparatus includes a memory storing distortion compensation coefficient in a designated write address, and outputting distortion compensation coefficient being stored in a designated readout address; a predistortion section performing distortion compensation processing onto a transmission signal, using the distortion compensation coefficient being output from memory; and a distortion compensation section calculating an update value of distortion compensation coefficient, based on error component existent between transmission signal before distortion compensation processing and transmission signal after being amplified by an amplifier. Further, the distortion compensation section modifies magnitude of step size parameter determining degree of effect of error component produced on the update value, when calculating the update value of the distortion compensation coefficient.

公开(公告)号：US20060188038A1

公开(公告)日：2006-08-24

申请号：US11147462

申请日：2005-06-08

Applicant: Hideharu Shako ,  Yasuhito Funyu ,  Takeshi Ohba

Inventor： Hideharu Shako ,  Yasuhito Funyu ,  Takeshi Ohba

IPC: H04L25/08

CPC classification number: H04L27/368 ,  H03F1/3247

Abstract: A distortion compensation apparatus is provided to restrain an increased calculation time caused by a large amount of calculation required for obtaining a phase variation amount for compensation from the correlation. The distortion compensation apparatus includes an update calculation section calculating a distortion compensation coefficient by use of an adaptive algorithm; a distortion compensation section performing distortion compensation to the transmission signal, based on the distortion compensation coefficient being read out from the distortion compensation coefficient storage; a correlation calculation section calculating a real part of correlation and an imaginary part of correlation of each the reference signal and the feedback signal; and a phase rotation section compensating a relative phase deviation between the reference signal and the feedback signal, based on the real part of correlation and the imaginary part of correlation calculated by the correlation calculation section, wherein the update calculation section calculates a distortion compensation coefficient using the post-compensation signal.

Abstract translation: 提供了一种失真补偿装置，用于抑制从相关性获得用于补偿的相位变化量所需的大量计算所引起的增加的计算时间。 失真补偿装置包括：更新计算部，利用自适应算法计算失真补偿系数; 基于从失真补偿系数存储器读出的失真补偿系数，对发送信号进行失真补偿的失真补偿部; 相关计算部分，计算每个参考信号和反馈信号的相关的实部和相关的虚部; 以及相位旋转部，其基于由所述相关计算部计算出的相关的实部和所述相关的虚部，补偿所述参考信号和所述反馈信号之间的相对相位偏差，其中，所述更新计算部使用 后补偿信号。

公开(公告)号：US20060046764A1

公开(公告)日：2006-03-02

申请号：US11018258

申请日：2004-12-21

Applicant: Takeshi Ohba ,  Yasuhito Funyu ,  Hiroaki Abe ,  Tomohiro Nakamura

Inventor： Takeshi Ohba ,  Yasuhito Funyu ,  Hiroaki Abe ,  Tomohiro Nakamura

IPC: H04B7/00 ,  H04B1/00 ,  H04Q7/20

CPC classification number: H04L27/2614

Abstract: A power correction value generating unit determines a power correction value for minimizing an error, from a reference output power value of a carrier multiplexed signal, generating due to peak power suppression under a carrier setting based on the carrier setting relating to either one or both of the number of carrier signals and frequency arrangement, and peak suppression setting. An output power error correcting unit corrects a signal gain before or after the carrier signals are multiplexed, using the power correction value obtained by the power correction value generating unit. In an apparatus performing peak suppression according to an input limitation power of the power amplifier, it is possible to always obtain a desirable transmission (output) power even when the number of carriers or carrier frequency arrangement varies.

Abstract translation: 功率校正值生成单元根据载波复用信号的基准输出功率值，根据载波设定下的峰值功率抑制而产生的误差最小化的功率校正值，基于与 载波信号的数量和频率排列以及峰值抑制设置。 输出功率误差校正单元使用由功率校正值生成单元获得的功率校正值来校正载波信号被复用之前或之后的信号增益。 在根据功率放大器的输入限制功率进行峰值抑制的装置中，即使当载波数或载波频率布置发生变化时，也可以总是获得期望的传输（输出）功率。

公开(公告)号：US06949976B2

公开(公告)日：2005-09-27

申请号：US11022239

申请日：2004-12-23

Applicant: Yasuhito Funyu ,  Takao Sasaki ,  Hiromi Miyamoto ,  Takeshi Ohba

Inventor： Yasuhito Funyu ,  Takao Sasaki ,  Hiromi Miyamoto ,  Takeshi Ohba

IPC: H03F1/32 ,  H03F1/26

CPC classification number: H03F1/3247

Abstract: A distortion compensating amplifier device is disclosed that maintains uniform delay amounts between a transmission input signal and a transmission output signal, even if there is a change in the device characteristics. The distortion compensating amplifier device of a digital predistortion type includes a second delay circuit that delays the transmission input signal; a distortion compensating circuit that performs predistortion compensation on the delayed signal, using a distortion compensating parameter; an amplifier that amplifies the signal subjected to the predistortion compensation; a first delay circuit that further delays the signal delayed by the second delay circuit; and a calculator that calculates the distortion compensating parameter to be used in the predistortion compensation, based on the difference between the signal output from the first delay circuit and the amplified signal.

Abstract translation: 公开了一种失真补偿放大器装置，即使在器件特性有变化的情况下，也能够在发送输入信号和发送输出信号之间保持均匀的延迟量。 数字预失真型的失真补偿放大器装置包括延迟发送输入信号的第二延迟电路; 失真补偿电路，使用失真补偿参数对延迟信号执行预失真补偿; 放大器，用于放大经过预失真补偿的信号; 第一延迟电路，其进一步延迟由所述第二延迟电路延迟的信号; 以及计算器，其基于从第一延迟电路输出的信号与放大信号之间的差异来计算用于预失真补偿的失真补偿参数。