-
公开(公告)号：US20240313857A1
公开(公告)日：2024-09-19
申请号：US17993168
申请日：2022-11-23
发明人： Can Wu , Yue Ma , Naveen Verma , James Sturm , Sigurd Wagner
IPC分类号： H04B7/22
CPC分类号： H04B7/22
摘要： Systems and methods disclosed herein provide for a passive backscattering beamformer based on large-area electronics (LAE). Low power is critical for distributed nodes in future IoT/5G networks. A key emerging solution is using ubiquitous 2.4 GHz Wi-Fi infrastructure with passive backscattering nodes, for low-power communication. LAE enables monolithic integration of devices over large and flexible substrates, with recent advances into the gigahertz regime opening new opportunities for wireless systems. An LAE passive backscattering beamformer is chosen that is capable of (1) enhancing the backscattered signal power in a scalable manner enabled by LAE's monolithic integrability over meter-scale area; (2) configuration between constructive/destructive beamforming; (3) frequency-shift keying for data modulation and SNR enhancement, by shifting the signal away from the incident interferer; and (4) frequency division multiplexing for increasing data bandwidth.
-
62.发明公开公开(公告)号：US20240204867A1
公开(公告)日：2024-06-20
申请号：US18082962
申请日：2022-12-16
IPC分类号： H04B7/22 , H04B17/391
CPC分类号： H04B7/22 , H04B17/391
摘要： A communications node for transmitting and receiving beyond line of sight (BLOS) communications through an evaporation duct (ED) environment proximate to a body of water (e.g., coastal, littoral) models environmental conditions (e.g., duct heights) based on current climate data for the ED environment. Based on the modelled ED conditions, the node generates signal propagation models for each of a set of possible transmitting frequencies (e.g., likely signal loss, transmission range). Based on the most current ED signal propagation model, the node selects the optimal transmission frequency for BLOS communications through the evaporation duct.
-
公开(公告)号：US20240146408A1
公开(公告)日：2024-05-02
申请号：US17973685
申请日：2022-10-26
发明人： SANJEEWA HERATH , JAVAD ABDOLI
摘要： A backscatter transmission scheme is provided in which a carrier signal is transmitted by a carrier communication device discontinuously as carrier signal bursts. The carrier signal, while it is on, is divided into carrier time segments. Each carrier time segment has a specified time. The different carrier time segments represent different times that backscatter devices can make backscatter transmissions. In addition, in some embodiments, a set of frequencies are available for backscatter transmission. The set of frequencies includes the carrier frequency and a set of frequencies with respective frequency shifts relative to the carrier frequency. The combination of a specific carrier time segment, a specific frequency shift, together constitutes a specific backscatter transmission opportunity.
-
公开(公告)号：US11894953B2
公开(公告)日：2024-02-06
申请号：US17180133
申请日：2021-02-19
申请人： ZTE Corporation
发明人： Hanqing Xu , Jun Xu , Yajun Zhao , Mengzhu Chen , Saijin Xie
IPC分类号： H04W74/04 , H04L25/03 , H04B17/345 , H04W36/06 , H04W72/0446 , H04W72/27 , H04B7/22 , H04L1/00
CPC分类号： H04L25/03006 , H04B17/345 , H04W36/06 , H04W72/0446 , H04W72/27 , H04B7/22 , H04L1/0003 , H04L1/0009
摘要： Method, systems and devices for identifying and mitigating remote interference, e.g. a downlink transmission from a remote network device interfering with uplink transmissions of another network device, are described. One example method for identifying remote interference includes determining that an interference type is a remote interference, and transmitting, in response to the determining, a reference signal indicative of a resource that was affected by the remote interference. Another example method for identifying remote interference includes detecting a reference signal in a frame, and determining a resource that was affected by a remote interference based on a position of the reference signal in the frame.
-
公开(公告)号：US11728887B2
公开(公告)日：2023-08-15
申请号：US17447383
申请日：2021-09-10
申请人： Skywave Networks LLC
发明人： Kevin J. Babich
摘要： A wireless communication system includes a first wireless communication node for transmitting a data signal that is sent to a second wireless communication node by skywave propagation over at least two different data transmission paths. The first data transmission path includes at least one reflection point where the data signal is reflected by the atmosphere and the second data transmission path includes more reflection points than the first data transmission path. The data signal that travelled along the first data transmission path is decoded before the data signal that travelled along the second data transmission path.
-
66.发明申请公开(公告)号：US20230118922A1
公开(公告)日：2023-04-20
申请号：US17686461
申请日：2022-03-04
发明人： Danny Rittman , Mo Jacob
摘要： Wireless communication systems and methods are provided that include at least one base transmitter unit, at least one repeater unit, at least one receiver, and an artificial intelligence unit. The base transmitter unit is configured to transmit a data signal. The repeater unit is in communication with the transmitter and is configured to transmit the data signal via sky wave propagation. The receiver is in communication with the transmitter and the repeater and is configured to receive the data signal. The artificial intelligence unit monitors ionospheric conditions in the area and controls the data signal, making adjustments so the data signal overcomes skip zones. The adjustments may include automatically adjusting the power and position of the antenna array to re-route the data signal and/or dynamically changing the frequency of the data signal.
-
公开(公告)号：US20230067256A1
公开(公告)日：2023-03-02
申请号：US17411864
申请日：2021-08-25
发明人： Rayman PON , Pranav IYENGAR , Liang ZHAO
摘要： A satellite signal processing method includes: receiving, at a user equipment, a first satellite signal of a first frequency band from at least one satellite of a constellation of satellites; receiving, at the user equipment, a second satellite signal of a second frequency band and from the at least one satellite of the constellation of satellites; and controlling an activation status of at least one of: a first satellite signal receive chain, of the user equipment, configured to measure the first satellite signal; or a second satellite signal receive chain, of the user equipment, configured to measure the second satellite signal.
-
公开(公告)号：US20230016160A1
公开(公告)日：2023-01-19
申请号：US17782802
申请日：2020-05-20
发明人： Huanqiu YE , Feifeng QIN
摘要： Embodiments of the present disclosure relate to methods, devices, apparatuses and computer readable storage media for signal source identification and determination. According to embodiments of the present disclosure, in response to detecting a signal, a device identifies at least one unit sequence from the signal. A bandwidth of each unit sequence is a common divisor of overlapping system bandwidths among a plurality of devices. The at least one unit sequence uniquely identifies a further device transmitting the signal. The device determines, based on the at least one unit sequence, the further device from the plurality of devices. As such, a device suffering interference due to atmospheric ducting can find out an interference source and perform an action to avoid the interference.
-
69.发明申请公开(公告)号：US20220407592A1
公开(公告)日：2022-12-22
申请号：US17261873
申请日：2020-12-26
发明人： Yongjun Xu , Qianbin Chen , Guoquan Li , Qilie Liu
摘要： The present invention relates to a multi-carrier resource allocation method based on a wireless-powered backscatter communication network. The method comprises following steps: S1. constructing a wireless-powered backscatter communication system; S2: according to circuit power and transmit power constraints, establishing a resource allocation optimization problem taking a maximum total transmission rate of the system as an objective function; S3: according to the objective function and constraint conditions, decomposing an optimization sub-problem taking the transmit power of the backscatter transmitter as a variable; S4: after substituting optimal transmit power of the backscatter transmitter into an original problem, decomposing a sub-problems taking an energy allocation coefficient as a variable from an original optimization problem; S5: converting non-convex problems containing coupling variables into convex problems, creating a Lagrangian function, obtaining an optimal solution form according to a KKT condition, and iteratively updating corresponding variables using a gradient descent method until convergence.
-
公开(公告)号：US11483836B2
公开(公告)日：2022-10-25
申请号：US16344983
申请日：2017-10-25
发明人： Pengyu Zhang , Dinesh Bharadia , Sachin Katti
摘要： A backscatter tag device includes, in part, a receiver configured to receive a packet conforming to a communication protocol defining a multitude of codewords, a codeword translator configured to translate at least a first subset of the multitude of codewords disposed in the packet to a second multitude of codewords defined by the protocol in response to a data the backscatter tag is invoked to transmit, and a transmitter configured to transmit the packet supplied by the codeword translator at a frequency different than the first frequency at which the packer is received. The communication protocol may optionally be the 802.11 g/n, ZigBee or the Bluetooth communication protocol.
-
-
-
-
-
-
-
-
-
搜索结果
173 条记录 (耗时 0.026 秒)
