公开(公告)号：US20190074855A1

公开(公告)日：2019-03-07

申请号：US16120417

申请日：2018-09-03

Applicant: Realtek Semiconductor Corp.

Inventor： Chin-Liang Wang ,  Min-Chau Jan ,  Wen-Shan Wang ,  Yuan-Shuo Chang ,  Wu-Chi Wang ,  Ying-Hsi Lin

IPC: H04B1/04

Abstract: A transmitting device, for handling signal interference, comprises a first transmitting circuit, for processing a first plurality of baseband signals, to generate a first plurality of radio frequency signals; a second transmitting circuit, for processing a second plurality of baseband signals and a plurality of input signals, to generate a second plurality of radio frequency signals; a feedback circuit, coupled to the second transmitting circuit, for processing the second plurality of radio frequency signals and a plurality of leakage signals, to generate a plurality of error signals; and a control circuit, coupled to the first transmitting circuit, the second transmitting circuit and the feedback circuit, for generating the plurality of input signals according to the first plurality of baseband signals and the plurality of error signals.

公开(公告)号：US09036753B1

公开(公告)日：2015-05-19

申请号：US14543856

申请日：2014-11-17

Applicant: Realtek Semiconductor Corp.

Inventor： Yuan-Shuo Chang ,  Ching-Chia Cheng

IPC: H04B1/10 ,  H04B17/00 ,  H04L27/36 ,  H04L25/03

CPC classification number: H04B17/10 ,  H04B17/11 ,  H04B17/14 ,  H04L25/03261 ,  H04L27/366 ,  H04L27/38

Abstract: A method for calibrating mismatches of an in-phase signal path and a quadrature signal path of a transmitter, including: additionally configuration at least one mixer calibration coefficient at a transmitting part of the transmitter; obtaining at least one mixer testing signal from the transmitting part via loopback for spectrum analysis to derive at least one mixer spectrum analysis result; adjusting the mixer calibration coefficient of the transmitting part according to the mixer spectrum analysis result; and additionally utilizing an in-phase signal path finite impulse response filter and a quadrature signal path finite impulse response filter to calibrate mismatches between a low pass filter of the in-phase signal path of the transmitting part of the transmitter and a low pass filter of the quadrature signal path of the transmitting part of the transmitter. A similar mismatch calibration operation may be applied to a receiver.

Abstract translation: 一种用于校准发射机的同相信号路径和正交信号路径的不匹配的方法，包括：另外在发射机的发射部分配置至少一个混频器校准系数; 通过环回获得来自发射部分的至少一个混频器测试信号用于频谱分析以得到至少一个混频器频谱分析结果; 根据混频器频谱分析结果调整发射部分的混频器校准系数; 并且另外利用同相信号路径有限脉冲响应滤波器和正交信号路径有限脉冲响应滤波器来校准发射机的发射部分的同相信号路径的低通滤波器与低通滤波器的低通滤波器 发射机发射部分的正交信号路径。 类似的不匹配校准操作可以应用于接收器。

公开(公告)号：US20150054585A1

公开(公告)日：2015-02-26

申请号：US14458244

申请日：2014-08-12

Applicant: Realtek Semiconductor Corp.

Inventor： Yuan-Shuo Chang

IPC: H03F3/19 ,  H03F1/32 ,  H03F3/24

CPC classification number: H03F3/19 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/245 ,  H03F2200/451 ,  H03F2201/3224 ,  H03F2201/3233

Abstract: A pre-distortion method includes: receiving an input data; and obtaining a pre-distortion output by inputting the input data into a pre-distortion function, wherein the pre-distortion function is determined according to a following power amplifier; and multiplying a reciprocal of a pre-distortion ratio of the output of the power amplifier to the input data by the output of the power amplifier. A pre-distortion apparatus includes a receiver, a pre-distortion unit and a gain compensating unit. The receiver is utilized for receiving an input data. The pre-distortion unit is utilized for obtaining a pre-distortion output by inputting the input data into a pre-distortion function, wherein the pre-distortion function is determined according to a following power amplifier. The gain compensating unit is utilized for multiplying a reciprocal of a pre-distortion ratio of the output of the power amplifier to the input data by the output of the power amplifier.

Abstract translation: 预失真方法包括：接收输入数据; 以及通过将所述输入数据输入到预失真功能中来获得预失真输出，其中所述预失真功能根据随后的功率放大器确定; 并且通过功率放大器的输出将功率放大器的输出的预失真比的倒数与输入数据相乘。 预失真装置包括接收机，预失真单元和增益补偿单元。 接收机用于接收输入数据。 预失真单元用于通过将输入数据输入到预失真功能中来获得预失真输出，其中根据随后的功率放大器确定预失真功能。 增益补偿单元用于通过功率放大器的输出将功率放大器的输出的预失真比的倒数与输入数据相乘。

公开(公告)号：US20140018029A1

公开(公告)日：2014-01-16

申请号：US13937198

申请日：2013-07-08

Applicant: Realtek Semiconductor Corp.

Inventor： Yuan-Shuo Chang ,  Wen-Shan Wang

IPC: H04B1/10

CPC classification number: H04B1/10 ,  H03C5/00 ,  H03D3/009 ,  H04B1/30 ,  H04L27/0014 ,  H04L27/364 ,  H04L27/3809 ,  H04L27/3863

Abstract: Filter coefficients are generated by testing a wireless communication system using single-tone signals. While using the filter coefficients in a filter module, signal imbalance caused by a local oscillator or analog elements in a wireless communication system can be eliminated, so as to prevent the wireless communication system from being affected by the noises.

Abstract translation: 通过使用单音信号测试无线通信系统来产生滤波器系数。 当在滤波器模块中使用滤波器系数时，可以消除由无线通信系统中的本地振荡器或模拟元件引起的信号不平衡，从而防止无线通信系统受到噪声的影响。

公开(公告)号：US20230253995A1

公开(公告)日：2023-08-10

申请号：US18105892

申请日：2023-02-06

Applicant: Realtek Semiconductor Corp.

Inventor： Wu-Chi Wang ,  Yuan-Shuo Chang

IPC: H04B1/04 ,  H04B1/62

CPC classification number: H04B1/0475 ,  H04B1/62 ,  H04B2001/0425 ,  H04B2001/0433

Abstract: A communications device and a method for compensating frequency response distortion of the communications device are provided. The communications device includes a transmitting path circuitry, a receiving path circuitry, a pre-distortion circuit and a pre-equalizer circuit. The transmitting path circuitry generates an output test signal according to a pre-distortion test signal, and the receiving path circuitry generates a first feedback signal according to the output test signal, where the pre-distortion circuit is calibrated according to the first feedback signal. After calibration of the pre-distortion circuit is finished, the pre-distortion circuit generates a second feedback signal according to a single tone signal, where the pre-equalizer circuit is calibrated according to the second feedback signal. After calibration of the pre-equalizer circuit is finished, a transmission signal is processed by the pre-equalizer circuit and the pre-distortion circuit first and then output via the transmitting path circuitry to outside the communications device.

公开(公告)号：US10305523B2

公开(公告)日：2019-05-28

申请号：US16120417

申请日：2018-09-03

Applicant: Realtek Semiconductor Corp.

Inventor： Chin-Liang Wang ,  Min-Chau Jan ,  Wen-Shan Wang ,  Yuan-Shuo Chang ,  Wu-Chi Wang ,  Ying-Hsi Lin

IPC: H04B1/04

Abstract: A transmitting device, for handling signal interference, comprises a first transmitting circuit, for processing a first plurality of baseband signals, to generate a first plurality of radio frequency signals; a second transmitting circuit, for processing a second plurality of baseband signals and a plurality of input signals, to generate a second plurality of radio frequency signals; a feedback circuit, coupled to the second transmitting circuit, for processing the second plurality of radio frequency signals and a plurality of leakage signals, to generate a plurality of error signals; and a control circuit, coupled to the first transmitting circuit, the second transmitting circuit and the feedback circuit, for generating the plurality of input signals according to the first plurality of baseband signals and the plurality of error signals.

公开(公告)号：US09331652B2

公开(公告)日：2016-05-03

申请号：US14247669

申请日：2014-04-08

Applicant: Realtek Semiconductor Corp.

Inventor： Yuan-Shuo Chang

IPC: H04B1/04 ,  H03G3/00 ,  H03G3/30

CPC classification number: H03G3/3042

Abstract: An auto gain adjusting device and method is disclosed. The auto gain adjusting device comprises a predistorter, a gain unit, a power amplifier, a receiving unit and a calculation unit. The predistorter generates a plurality of test signals in a calibration mode, wherein the powers between a current test signal and a previous test signal includes a first difference value. The gain unit provides a substantially constant gain value to the current test signal and the previous test signal to generate a current amplified test signal and a previous amplified test signal. The power amplifier amplifies the current amplified test signal and the previous amplified test signal to generate a first transmitting signal and a second transmitting signal. The receiving unit converts the first transmitting signal and the second transmitting signal into a first baseband signal and a second baseband signal respectively. The calculation unit calculates a second difference value between powers of the first baseband signal and the second baseband signal, and compares the second difference value with the first difference value to determine whether the substantially constant gain value causes the plurality of test signals to be operated in a linear region and a compression region of the power amplifier.

Abstract translation: 公开了一种自动增益调节装置和方法。 自动增益调节装置包括预失真器，增益单元，功率放大器，接收单元和计算单元。 预失真器在校准模式下产生多个测试信号，其中当前测试信号和先前测试信号之间的功率包括第一差分值。 增益单元为当前测试信号和先前的测试信号提供基本恒定的增益值，以产生电流放大测试信号和先前放大的测试信号。 功率放大器放大当前放大的测试信号和先前放大的测试信号，以产生第一发射信号和第二发射信号。 接收单元将第一发送信号和第二发送信号分别转换为第一基带信号和第二基带信号。 计算单元计算第一基带信号和第二基带信号的功率之间的第二差分值，并将第二差值与第一差分值进行比较，以确定基本恒定的增益值是否使多个测试信号在 功率放大器的线性区域和压缩区域。

公开(公告)号：US20140016690A1

公开(公告)日：2014-01-16

申请号：US13939171

申请日：2013-07-10

Applicant: Realtek Semiconductor Corp.

Inventor： Yuan-Shuo Chang

IPC: H04L25/03

CPC classification number: H04L25/03885 ,  H04L27/364 ,  H04L27/3863

Abstract: Multiplier coefficients are updated according to minimal power value of mixed signals in a wireless communication system. While using updated multiplier parameters, signal imbalance caused by a local oscillator or mismatch between analog elements of the wireless communication system can be reduced, so that the wireless communication system can be immune from noises.

Abstract translation: 根据无线通信系统中的混合信号的最小功率值来更新乘数系数。 在使用更新的乘法器参数时，可以减少由本地振荡器引起的信号不平衡或无线通信系统的模拟元件之间的不匹配，使得无线通信系统能够免受噪声的影响。

公开(公告)号：US20130215999A1

公开(公告)日：2013-08-22

申请号：US13761129

申请日：2013-02-06

Applicant: Realtek Semiconductor Corp.

Inventor： Yuan-Shuo Chang ,  Hong-Ta Hsu

IPC: H04L1/00

CPC classification number: H04L1/0033 ,  H04L1/0001 ,  H04L1/24 ,  H04L1/243

Abstract: A method for compensating mismatches of an in-phase signal and a quadrature signal of a transmitter/receiver is provided. The method includes: receiving a plurality of test signals to generate two groups of factors, respectively, where each group of factors is applied to two multipliers utilized for compensating a gain mismatch and a phase mismatch of the in-phase signal and the quadrature signal of the transmitter/receiver; then calculating a delay mismatch of the in-phase signal and the quadrature signal according to the two groups of factors.

公开(公告)号：US20230238991A1

公开(公告)日：2023-07-27

申请号：US18096539

申请日：2023-01-12

Applicant: Realtek Semiconductor Corp.

Inventor： Wu-Chi Wang ,  Tzu-Ming Kao ,  Yuan-Shuo Chang

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H04B2001/0425

Abstract: A communications device and a method for compensating frequency response distortion of the communication device are provided. The communications device includes a transmitting path circuitry, a receiving path circuitry, a memory pre-distortion circuit, a pre-equalizer circuit and a pre-equalization calculation circuit. The transmitting path circuitry and the receiving path circuitry are configured to generate a feedback signal according to a pre-distortion test signal, where a set of pre-distortion coefficients of the memory pre-distortion circuit are calibrated according to the feedback signal. After calibration of the set of pre-distortion coefficients is finished, the pre-equalization calculating circuit performs calculation on the set of pre-distortion coefficients to generate a calculation result for calibrating the pre-equalizer circuit. After calibration of the pre-equalizer circuit is finished, a transmission signal is processed by the pre-equalizer circuit and the memory pre-distortion circuit first, and then output to outside of the communications device via the transmitting path circuitry.