公开(公告)号：US10153798B2

公开(公告)日：2018-12-11

申请号：US15728472

申请日：2017-10-09

Applicant: Aviat U.S., Inc.

Inventor： Sreco Plevel

IPC: H04B1/12 ,  H04B1/10 ,  H04L27/36 ,  H04J4/00 ,  H04L25/03 ,  H04L25/02 ,  H04L27/26

Abstract: An example system comprises a first antenna and a modem. The first antenna is configured to receive a signal from a transmitting radio frequency unit. The signal includes data and a known sequence. The modem is configured to retrieve the known sequence from the signal, transform the known sequence and the data into a frequency domain, calculate averages of groups of neighboring frequency points in the frequency domain to reduce the effect of nonlinear noise in the signal, the neighboring frequency points corresponding to the preamble in the frequency domain, compare the calculated averages to an expected frequency response in the frequency domain, determine a correction filter to apply to the data based on the comparison, apply the correction filter on the data in the frequency domain to create corrected data, transform the corrected data from the frequency domain to the time domain, and provide the data.

公开(公告)号：US10091051B2

公开(公告)日：2018-10-02

申请号：US15653485

申请日：2017-07-18

Applicant: Aviat U.S., Inc.

Inventor： Alain Hourtane ,  Sergio Licardie ,  Chaoming Zeng

IPC: H04L12/24 ,  H04W24/04 ,  H04L12/703 ,  H04L12/701 ,  H04L12/42

Abstract: Rapid failure detection and recovery in wireless communication networks is needed in order to meet, among other things, carrier class Ethernet transport channel standards. Thus, resilient wireless packet communications is provided using a hardware-assisted rapid transport channel failure detection algorithm and a Gigabit Ethernet data access card with an engine configured accordingly. In networks with various topologies, this is provided in combination with their existing protocols, such as rapid spanning tree and link aggregation protocols, respectively.

公开(公告)号：US10090570B2

公开(公告)日：2018-10-02

申请号：US15357967

申请日：2016-11-21

Applicant: Aviat U.S., Inc.

Inventor： Edwin Nealis ,  Jayesh Nath

IPC: H01P1/02 ,  H01P1/04 ,  H01P11/00 ,  H01P3/12

Abstract: Various embodiments provide for waveguide assemblies which may be utilized in wireless communication systems. Various embodiments may allow for waveguide assemblies to be assembled using tools and methodologies that are simpler than the conventional alternatives. Some embodiments provide for a waveguide assembly that comprises a straight tubular portion configured to be shortened, using simple techniques and tools, in order to fit into a waveguide assembly. For instance, for some embodiments, the waveguide assembly may be configured such that the straight portion can be shortened, at a cross section of the portion, using a basic cutting tool, such a hacksaw. In some embodiments, the straight portion may be further configured such that regardless of whether the straight tubular portion is shortened, the waveguide assembly remains capable of coupling to flanges, which facilitate coupling the straight tubular portion to connectable assemblies, such as other waveguide assemblies, radio equipment, or antennas.

公开(公告)号：US10084689B2

公开(公告)日：2018-09-25

申请号：US15182524

申请日：2016-06-14

Applicant: Aviat U.S., Inc.

Inventor： Chaoming Zeng ,  Sergio Licardie

IPC: H04L12/709 ,  H04W24/04 ,  H04W76/15 ,  H04L1/00 ,  H04L29/06 ,  H04B7/10 ,  H04L12/46 ,  H04L12/721 ,  H04W76/02 ,  H04L12/891 ,  H04L29/08

CPC classification number: H04L45/245 ,  H04B7/10 ,  H04L1/00 ,  H04L12/4633 ,  H04L45/66 ,  H04L47/41 ,  H04L69/14 ,  H04L69/323 ,  H04L2212/00 ,  H04W24/04 ,  H04W76/15

Abstract: A first layer one link aggregation master comprises a first port coupled to receive customer traffic; a first channel; a second channel; an aggregation engine coupled to the first and second channels; a first switch circuit coupled to the first port and to the first channel, and configured to communicate the customer traffic from the first port over the first channel to the aggregation engine, the aggregation engine including a splitter circuit configured to use layer one information to segment at least a portion of the customer traffic into a first virtual container and a second virtual container, the aggregation engine further including an encapsulation circuit configured to encapsulate the second virtual container using Ethernet standards for transport over the second channel; a radio access card configured to generate an air frame based on the first virtual container for wireless transmission over a first wireless link of a link aggregation group to the receiver; and a second switch circuit coupled to the second channel, and configured to communicate the Ethernet-encapsulated second virtual container over an Ethernet cable to a slave for wireless transmission over a second wireless link of the link aggregation group to the receiver.

公开(公告)号：US09998200B2

公开(公告)日：2018-06-12

申请号：US14311232

申请日：2014-06-20

Applicant: Aviat U.S., Inc.

Inventor： Paul A. Kennard

IPC: H04B7/155

CPC classification number: H04B7/15535

Abstract: Various embodiments provide for systems, methods, or apparatuses that provide a fronthaul architecture that facilitates high fidelity and low latency communication between a radio processing unit, such as a baseband unit (BBU), which may be located a central office (CO), and a remote transceiver, which may comprise a remote radio head (RRH) or a remote radio unit (RRU), which may be located at remote cell site.

公开(公告)号：US20180053982A1

公开(公告)日：2018-02-22

申请号：US15802270

申请日：2017-11-02

Applicant: Aviat U.S., Inc.

Inventor： Jayesh Nath ,  Ying Shen

IPC: H01P3/08 ,  H01L23/48 ,  H01L23/66

CPC classification number: H01P3/081 ,  H01L23/481 ,  H01L23/66 ,  H01L2223/6616 ,  H01L2223/6627 ,  H01L2223/6683 ,  H01L2924/0002 ,  Y10T29/49155 ,  H01L2924/00

Abstract: Systems and methods for improved chip device performance are discussed herein. An exemplary chip device for use in an integrated circuit comprises a bottom and a top opposite the bottom. The chip device comprises a through-chip device interconnect and a clearance region. The through-chip device interconnect is configured to provide an electrical connection between a ground plane trace on the bottom and a chip device path on the top of the chip device. The clearance region on the bottom of the chip device comprises an electrically conductive substance. The size and shape of the clearance region assist in impedance matching. The chip device path on the top of the chip device may further comprise at least one tuning stub. The size and shape of the at least one tuning stub also assist in impedance matching.

公开(公告)号：US09825724B2

公开(公告)日：2017-11-21

申请号：US14150698

申请日：2014-01-08

Applicant: Aviat U.S., Inc.

Inventor： Sergio Licardie ,  Ivana Maric

IPC: H04J3/06

CPC classification number: H04J3/0658

Abstract: According to some embodiments, a master device sends synchronization packets to one or more slave devices, and does so periodically based on a master clock signal having a master clock frequency. At each of the slave devices, an algorithm estimates the master clock frequency based on the timing of synchronization packet arrivals the slave device. The algorithm may estimate the master clock frequency using both the currently-observed timing of synchronization packet arrivals and the history of previous synchronization packet arrivals (e.g., previously-observed timing of synchronization packet arrivals). Based on the estimated master clock frequency, each of the one or more slave devices can update the frequency of their respective slave clock signal (e.g., using a frequency offset) to match that of the estimated master clock frequency.

公开(公告)号：US09813198B2

公开(公告)日：2017-11-07

申请号：US14506452

申请日：2014-10-03

Applicant: Aviat U.S., Inc.

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

IPC: H04L1/20 ,  H04L1/00 ,  H04B1/00 ,  H04B1/16 ,  H03C3/40 ,  H03D3/00 ,  H03D7/16 ,  H04B1/30 ,  H04L27/38 ,  H04B1/28 ,  H04B1/10

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.

公开(公告)号：US09531412B2

公开(公告)日：2016-12-27

申请号：US14704468

申请日：2015-05-05

Applicant: Aviat U.S., Inc.

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

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/345 ,  H03F3/19 ,  H03F3/245 ,  H03F3/60 ,  H03F2200/204 ,  H03F2200/207 ,  H03F2200/423 ,  H04B2001/0425

Abstract: Various embodiments provide for systems and methods for increased linear output power of a transmitter. An exemplary wireless communications system for transmitting an input signal comprises a predistorter module, a GaN power amplifier, a coupler, and an antenna. The predistorter module is configured to detect existing distortion by comparing the input signal to a feedback signal and generate a correction signal. The predistorter may adaptively adjust its operation to minimize the existing distortion due to GaN power amplifier nonlinear characteristics. The result is that the GaN power amplifier may send a power signal of improved linearity to the antenna. The coupler is configured to sample the amplified signal from the GaN power amplifier to generate the feedback signal. The antenna is configured to transmit the amplified signal.

公开(公告)号：US20160261240A1

公开(公告)日：2016-09-08

申请号：US15156832

申请日：2016-05-17

Applicant: Aviat U.S., Inc.

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

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

CPC classification number: H03F1/32 ,  H03F1/0205 ,  H03F1/0211 ,  H03F1/3247 ,  H03F3/19 ,  H03F3/21 ,  H03F3/245 ,  H03F2200/129 ,  H03F2200/207 ,  H03F2200/451 ,  H04B1/04 ,  H04B2001/0425

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.

Abstract translation: 示例性系统包括线性化模块，第一上变频器模块，功率放大器模块，信号采样器模块和下变频器模块。 线性化模块可以被配置为接收第一中频信号并且基于参考信号和基于第二中频信号的信号来调整第一中频信号。 第一上变频器模块可以被配置为基于经调整的第一中频信号将信号接收和上变频到射频信号。 功率放大器模块可以被配置为基于射频信号来接收和放大信号的功率。 信号采样器模块可以被配置为基于放大的射频信号对信号进行采样。 下变频器模块可以被配置为基于所采样的射频信号将信号接收和下变频到第二中频信号。