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    MICROPHONICS SUPPRESSION IN HIGH-SPEED COMMUNICATIONS SYSTEMS
    21.
    发明申请
    MICROPHONICS SUPPRESSION IN HIGH-SPEED COMMUNICATIONS SYSTEMS 有权
    高速通信系统中的麦克风抑制

    公开(公告)号：US20140198472A1

    公开(公告)日：2014-07-17

    申请号：US14158422

    申请日：2014-01-17

    Applicant: Aviat U.S., Inc.

    Inventor： Youming Qin ,  Frank S. Matsumoto ,  Eric Tiongson

    IPC: H05K5/02 ,  H05K13/00

    CPC classification number: H05K5/0217 ,  H05K7/142 ,  H05K13/00 ,  Y10T29/49002

    Abstract: One design aspect in electronic systems, such as communication systems, is noise suppression. More particularly, this relates to microphonics suppression in high-speed communication systems, such as microwave wireless radio systems. The present invention contemplates system design for substantially eliminating microphonic behavior created by mechanical stimulus such as vibrations and the drum effect. A preferred approach includes isolating the motherboard from its mounting harnesses (mechanical interconnection) and adding an echo damping and shock absorption pad to the underside of the enclosure cover to stiffen the enclosure cover while maintaining its light weight. Preferably also, this approach isolates the entire motherboard rather than a particular component. A design using this approach is particularly useful in an outdoor unit (ODU) of a split-mount microwave radio system.

    Abstract translation: 诸如通信系统的电子系统中的一个设计方面是噪声抑制。 更具体地说，这涉及在诸如微波无线电系统的高速通信系统中的麦克风抑制。 本发明考虑了用于基本上消除由诸如振动和鼓效应的机械刺激产生的麦克风行为的系统设计。 优选的方法包括将主板与其安装线束（机械互连）隔离，并将回波阻尼和减震垫添加到外壳盖的下侧，以在保持其重量的同时加强外壳盖。 优选地，这种方法隔离整个母板而不是特定的部件。 使用这种方法的设计在分体式微波无线电系统的室外单元（ODU）中特别有用。

    SYSTEMS AND METHODS FOR BIASING AMPLIFIERS WITH ADAPTIVE CLOSED LOOP CONTROL
    22.
    发明申请
    SYSTEMS AND METHODS FOR BIASING AMPLIFIERS WITH ADAPTIVE CLOSED LOOP CONTROL 有权
    用于自适应闭环控制放大放大器的系统和方法

    公开(公告)号：US20140191807A1

    公开(公告)日：2014-07-10

    申请号：US14150721

    申请日：2014-01-08

    Applicant: Aviat U.S., Inc.

    Inventor： Youming Qin ,  Frank Matsumoto ,  Andres Goytia ,  Cuong Nguyen

    IPC: H03F3/21 ,  H03F3/19

    CPC classification number: H03F3/21 ,  H03F1/0261 ,  H03F3/19 ,  H03F3/245

    Abstract: Various embodiments described herein provide systems and methods for improved performance for power amplifiers, particularly GaN power amplifiers. According to some embodiments, a power amplifier (e.g., GaN power amplifier) utilizes an adaptive closed loop control of the drain current of the power amplifier to achieve improved performance for the power amplifier.

    Abstract translation: 本文描述的各种实施例提供用于功率放大器，特别是GaN功率放大器的改进性能的系统和方法。 根据一些实施例，功率放大器（例如，GaN功率放大器）利用功率放大器的漏极电流的自适应闭环控制来实现功率放大器的改进的性能。

    SYSTEMS AND METHODS FOR ASYNCHRONOUS RE-MODULATION WITH ADAPTIVE I/Q ADJUSTMENT
    23.
    发明申请
    SYSTEMS AND METHODS FOR ASYNCHRONOUS RE-MODULATION WITH ADAPTIVE I/Q ADJUSTMENT 有权
    用于自适应I / Q调整的异步重新调制的系统和方法

    公开(公告)号：US20140128016A1

    公开(公告)日：2014-05-08

    申请号：US14155211

    申请日：2014-01-14

    Applicant: AVIAT U.S., INC.

    Inventor： Emerick Vann ,  Yen-Fang Chao ,  Youming Qin ,  Roland Matian

    IPC: H04B1/16

    CPC classification number: H04L1/206 ,  H03C3/406 ,  H03D3/009 ,  H03D7/168 ,  H04B1/0014 ,  H04B1/10 ,  H04B1/16 ,  H04B1/28 ,  H04B1/30 ,  H04L1/0036 ,  H04L1/203 ,  H04L1/208 ,  H04L27/38 ,  H04L27/3854

    Abstract: Various embodiments provide for systems and methods for signal conversion of one modulated signal to another modulated signal using demodulation and then re-modulation. According to some embodiments, a signal receiving system may comprise an I/Q demodulator that demodulates a first modulated signal to an in-phase (“I″) signal and a quadrature (“Q″) signal, an I/Q signal adjustor that adaptively adjusts the Q signal to increase the signal-to-noise ratio (SNR) of a transitory signal that is based on a second modulated signal, and an I/Q modulator that modulates the I signal and the adjusted Q signal to the second modulated signal. To increase the SNR, the Q signal may be adjusted based on a calculated error determined for the transitory signal during demodulation by a demodulator downstream from the I/Q modulator.

    Abstract translation: 各种实施例提供了用于使用解调然后再调制将一个调制信号信号转换成另一调制信号的系统和方法。 根据一些实施例，信号接收系统可以包括将第一调制信号解调为同相（“I”）信号和正交（“Q”）信号的I / Q解调器，I / Q信号调节器， 自适应地调整Q信号以增加基于第二调制信号的瞬态信号的信噪比（SNR），以及将I信号和经调整的Q信号调制为第二调制信号的I / Q调制器 信号。 为了增加SNR，可以基于在由I / Q调制器下游的解调器解调期间为瞬态信号确定的计算误差来调整Q信号。

    Systems and methods for improved power yield and linearization in radio frequency transmitters
    24.
    发明授权
    Systems and methods for improved power yield and linearization in radio frequency transmitters 有权

    公开(公告)号：US10476445B2

    公开(公告)日：2019-11-12

    申请号：US15907218

    申请日：2018-02-27

    Applicant: Aviat U.S., Inc.

    Inventor： Frank Matsumoto ,  Youming Qin ,  David C. M. Pham ,  Jayesh Nath ,  Ying Shen

    IPC: H04B1/04 ,  H03F1/32 ,  H03F1/02 ,  H03F3/24 ,  H03F3/19 ,  H03F3/21

    Abstract: An exemplary system comprises a linearizer module, a first upconverter module, a power amplifier module, a signal sampler module, and a downconverter module. The linearizer module may be configured to receive a first intermediate frequency signal and to adjust the first intermediate frequency signal based on a reference signal and a signal based on a second intermediate frequency signal. The first upconverter module may be configured to receive and up-convert a signal based on the adjusted first intermediate frequency signal to a radio frequency signal. The power amplifier module may be configured to receive and amplify a power of a signal based on the radio frequency signal. The signal sampler module may be configured to sample a signal based on the amplified radio frequency signal. The downconverter module may be configured to receive and down-convert a signal based on the sampled radio frequency signal to the second intermediate frequency signal.

    Systems and methods for adaptive power amplifier linearization
    30.
    发明授权
    Systems and methods for adaptive power amplifier linearization 有权
    自适应功率放大器线性化的系统和方法

    公开(公告)号：US08766718B2

    公开(公告)日：2014-07-01

    申请号：US13633066

    申请日：2012-10-01

    Applicant: Aviat U.S., Inc.

    Inventor： Frank Matsumoto ,  Youming Qin

    IPC: H03F1/26

    CPC classification number: H03F1/3247 ,  H03F1/56 ,  H03F3/211 ,  H03F3/24 ,  H03F2200/204 ,  H03F2200/207 ,  H03F2200/387 ,  H03F2200/405 ,  H03F2200/408 ,  H03F2200/411 ,  H03F2201/3227

    Abstract: An exemplary system comprises a linearizer, a power amplifier, and a feedback block. The linearizer may be configured to use a predistortion control signal to add predistortion to a receive signal to generate a predistorted signal. The power amplifier may be configured to amplify power of the predistorted signal to generate a first amplified signal. The power amplifier may also add high side and low side amplifier distortion to the predistorted signal. The high side and low side amplifier distortion may cancel at least a portion of the predistortion. The feedback block may be configured to capture a feedback signal based on a previous amplified signal from the power amplifier, to determine high side and low side distortion of the captured feedback signal, and to generate the predistortion control signal based on the determined high side and low side distortion.

    Abstract translation: 示例性系统包括线性化器，功率放大器和反馈块。 线性化器可以被配置为使用预失真控制信号来将预失真添加到接收信号以产生预失真信号。 功率放大器可以被配置为放大预失真信号的功率以产生第一放大信号。 功率放大器还可以向预失真信号增加高侧和低侧放大器失真。 高侧和低侧放大器失真可能会取消预失真的至少一部分。 反馈块可以被配置为基于来自功率放大器的先前放大的信号捕获反馈信号，以确定所捕获的反馈信号的高侧和低侧失真，以及基于所确定的高侧产生预失真控制信号，以及 低端失真。

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