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    Joint optimization of multiple beams for MU MIMO systems
    71.
    发明授权
    Joint optimization of multiple beams for MU MIMO systems 有权

    公开(公告)号：US11304238B2

    公开(公告)日：2022-04-12

    申请号：US16913995

    申请日：2020-06-26

    申请人： Ahmad Jalali ,  Kasra Jalali

    发明人： Ahmad Jalali ,  Kasra Jalali

    IPC分类号： H04W74/08 ,  H04W76/10 ,  H04L5/00 ,  H04L1/18 ,  H04W24/08 ,  H04W36/30

    摘要： In a beamforming system, each User Equipment (UE) transmits an uplink probe. Each Base Station (BS) carries out a spatial search of the uplink probes, estimates an Angle of Arrival (AoA) of the uplink probe received from each UE, and estimates the uplink channel frequency response on an uplink dedicated beam formed toward the UE's AoA. The BS transmits a reference signal to each UE on a downlink dedicated beam formed toward the UE's AoA, from which the UE estimates the downlink frequency response. The UE forms channel impulse response matrices for the uplink and the downlink, using the estimated uplink and downlink channel frequency responses. The BS uses the channel impulse response matrices to form downlink and uplink dedicated beams that put boresight of the beams toward the AoA of one UE and put nulls toward the AoAs of the other UEs.

    SIGNALING AND PROCEDURES FOR IDLE MODE BEAM TRACKING FOR MU MIMO SYSTEMS
    72.
    发明申请
    SIGNALING AND PROCEDURES FOR IDLE MODE BEAM TRACKING FOR MU MIMO SYSTEMS 有权

    公开(公告)号：US20210392689A1

    公开(公告)日：2021-12-16

    申请号：US16900585

    申请日：2020-06-12

    申请人： Ahmad Jalali

    发明人： Ahmad Jalali

    IPC分类号： H04W74/08 ,  H04L5/00 ,  H04W76/10

    摘要： In idle mode, User Equipment (UE) measures the changes in the UE's orientation and position location coordinates using sensors such as accelerometers, gyroscopes, and magnetometers. UE computes a metric of the changes in the UE's orientation and position location, and triggers a beam update process if the magnitude of the metric is above a threshold. UE begins the beam update process by sending a message to the Base Station (BS) with which it is communicating. BS estimates the Angle of Arrival (AoA) of the received message, forms a dedicated downlink beam toward the UE at the estimated AoA, and sends an acknowledgement on the dedicated downlink beam. The UE carries out a spatial search of the received acknowledgement, estimates the UE beam angular pointing position on which the highest signal quality is received, and points its beam toward the BS at the estimated UE beam angular pointing position.

    Provision of Broadband Access to Airborne Platforms
    73.
    发明申请
    Provision of Broadband Access to Airborne Platforms 有权
    提供宽带接入机载平台

    公开(公告)号：US20150280812A1

    公开(公告)日：2015-10-01

    申请号：US14228640

    申请日：2014-03-28

    申请人： Ahmad Jalali

    发明人： Ahmad Jalali

    IPC分类号： H04B7/185

    CPC分类号： H04B7/18506 ,  H04B7/10 ,  H04W28/0226 ,  H04W28/0231 ,  H04W36/08 ,  H04W40/22 ,  H04W84/06

    摘要： An air to ground (ATG) broadband access system is described. The system includes: a plurality of cell sites that together form a service coverage area, each cell site adapted to generate a local coverage area, each sell site including: multiple antenna fixtures situated at a lower corner of the local coverage area, where the local coverage area includes multiple sectors and each antenna fixture is associated with a different sector than each other antenna fixture; and a radio sub-system connected to each antenna fixture, the radio sub-system including a transmitter capable of modulating and transmitting signals through the antenna fixture and a receiver capable of demodulating and decoding signals received through the antenna fixture; and at least one aerial platform including: at least one antenna fixture capable of forming beams toward the cell site; and a radio sub-system capable of modulating and transmitting signals and demodulating and decoding signals.

    摘要翻译： 描述了空对地（ATG）宽带接入系统。 该系统包括：多个小区站点，其一起形成服务覆盖区域，每个小区站点适于生成本地覆盖区域，每个销售站点包括：位于本地覆盖区域的下角的多个天线固定装置，其中本地 覆盖区域包括多个扇区，并且每个天线固定装置与彼此天线固定装置的不同扇区相关联; 以及连接到每个天线固定装置的无线电子系统，所述无线电子系统包括能够通过天线装置调制和发送信号的发射机和能够解调和解码通过天线固定装置接收的信号的接收机; 以及至少一个空中平台，包括：至少一个天线固定装置，其能够朝向所述小区站点形成波束; 以及能够调制和发送信号以及解调和解码信号的无线电子系统。

    BROADBAND ACCESS SYSTEM VIA DRONE/UAV PLATFORMS
    74.
    发明申请
    BROADBAND ACCESS SYSTEM VIA DRONE/UAV PLATFORMS 有权
    宽带接入系统通过DRONE / UAV PLATFORMS

    公开(公告)号：US20150236779A1

    公开(公告)日：2015-08-20

    申请号：US14223705

    申请日：2014-03-24

    申请人： Ahmad Jalali

    发明人： Ahmad Jalali

    IPC分类号： H04B7/185 ,  H04W16/28

    CPC分类号： H04B7/18504 ,  H04B7/18508 ,  H04W16/28

    摘要： The present disclosure describes the system and methods for providing broadband internet access to homes and enterprises using a network of drones/UAVs. The drone communication system is composed of an antenna sub-system, a radio sub-system and a data switching sub-system. Drones form and point beams toward ground terminals in different areas in a space division multiple access scheme. Ground terminals are composed of an antenna sub-system and a radio sub-system. Ground terminals search for the drone from which they receive the strongest signals. Drone and ground terminals comprise of methods and systems to calibrate receive and transmit antenna elements. Drone radio sub-system keeps track of the drone's position and orientation changes and adjust drone's antenna beam accordingly to point to the same location on the ground as the drone moves. Depending on the changes in drone's position and orientation, the drone radio sub-system may switch the antenna aperture and/or the antenna fixture that is used to form a beam toward a specific ground terminal. Drones communicate with the terminals using a space and time division multiple

    摘要翻译： 本公开描述了使用无人机/无人机网络为家庭和企业提供宽带因特网接入的系统和方法。 无人机通信系统由天线子系统，无线电子系统和数据交换子系统组成。 无人机在空分多址方案中形成和点射到不同区域的接地终端。 接地端子由天线子系统和无线电子系统组成。 地面终端搜索无人机，从那里他们收到最强的信号。 无人机和接地端子包括用于校准接收和发射天线元件的方法和系统。 无人机无线电子系统跟踪无人机的位置和方位变化，并相应地调整无人机的天线波束，以指向无人机移动时在地面上的相同位置。 根据无人机的位置和方位的变化，无人机无线电子系统可以将用于形成波束的天线孔和/或天线固定装置切换到特定的接地终端。 无人机与终端使用空间和时分倍数进行通信

    Rate selection for an OFDM system
    76.
    发明授权
    Rate selection for an OFDM system 有权
    OFDM系统的速率选择

    公开(公告)号：US08644170B2

    公开(公告)日：2014-02-04

    申请号：US11297853

    申请日：2005-12-08

    申请人： Ahmad Jalali ,  Ivan Jesus Fernandez Corbaton

    发明人： Ahmad Jalali ,  Ivan Jesus Fernandez Corbaton

    IPC分类号： G01R31/08 ,  H04J11/00

    CPC分类号： H04L5/006 ,  H04L1/0002 ,  H04L1/0021 ,  H04L1/0023 ,  H04L1/1819 ,  H04L5/0007 ,  H04L5/0046 ,  Y02D50/10

    摘要： Techniques to determine the rate for a data transmission in an OFDM system. The maximum data rate that may be reliably transmitted over a given multipath (non-flat) channel by the OFDM system is determined based on a metric for an equivalent (flat) channel. For the given multipath channel and a particular rate (which may be indicative of a particular data rate, modulation scheme, and coding rate), the metric is initially derived from an equivalent data rate and the particular modulation scheme. A threshold SNR needed to reliably transmit the particular data rate using the particular modulation scheme and coding rate is then determined. The particular rate is deemed as being supported by the multipath channel if the metric is greater than or equal to the threshold SNR. Incremental transmission is used to account for errors in the determined data rate.

    摘要翻译： 确定OFDM系统中数据传输速率的技术。 基于等效（平坦）信道的度量来确定由OFDM系统在给定的多路径（非平坦）信道上可靠地发送的最大数据速率。 对于给定的多径信道和特定速率（其可以指示特定数据速率，调制方案和编码率），度量最初从等效数据速率和特定调制方案导出。 然后确定使用特定调制方案和编码速率可靠地发送特定数据速率所需的阈值SNR。 如果度量大于或等于阈值SNR，则特定速率被认为是由多径信道支持的。 增量传输用于解决确定的数据速率中的错误。

    OVERLAYING AN AIR TO GROUND COMMUNICATION SYSTEM ON SPECTRUM ASSIGNED TO SATELLITE SYSTEMS
    77.
    发明申请
    OVERLAYING AN AIR TO GROUND COMMUNICATION SYSTEM ON SPECTRUM ASSIGNED TO SATELLITE SYSTEMS 有权
    在分配给卫星系统的频谱上覆盖接地通信系统的空气

    公开(公告)号：US20130044611A1

    公开(公告)日：2013-02-21

    申请号：US13210628

    申请日：2011-08-16

    申请人： Ahmad Jalali ,  Leonard N. Schiff ,  William G. Ames

    发明人： Ahmad Jalali ,  Leonard N. Schiff ,  William G. Ames

    IPC分类号： H04B7/185 ,  H04W24/00

    CPC分类号： H04B7/18508 ,  H04B7/18502 ,  H04W16/14 ,  H04W36/20 ,  H04W36/30

    摘要： An air to ground communication system provides internet access to aircraft from ground based stations. The air to ground system shares spectrum with uplink portions of a satellite communication spectrum. Interference mitigation techniques are employed to avoid interference between the ground based communications and satellite communications. Fade mitigation techniques are employed to provide communication to aircraft at low angles of elevation in the presence of rain.

    摘要翻译： 空对地通信系统提供从地面站到飞机的互联网接入。 空对地系统与卫星通信频谱的上行链路部分共享频谱。 采用干扰减轻技术来避免基于地面的通信和卫星通信之间的干扰。 采用褪色减轻技术来在雨下的情况下以低仰角向飞机提供通信。

    Centralized medium access control algorithm for CDMA reverse link
    78.
    发明授权
    Centralized medium access control algorithm for CDMA reverse link 失效
    CDMA反向链路的集中式媒体接入控制算法

    公开(公告)号：US08254977B2

    公开(公告)日：2012-08-28

    申请号：US11441651

    申请日：2006-05-25

    申请人： Ivan Jesus Fernandez-Corbaton ,  Ahmad Jalali ,  Jordi de los Pinos Pont

    发明人： Ivan Jesus Fernandez-Corbaton ,  Ahmad Jalali ,  Jordi de los Pinos Pont

    IPC分类号： H04B7/00 ,  H04Q7/20

    CPC分类号： H04W52/343 ,  H04W52/367

    摘要： A novel MAC algorithm is disclosed having various features for a modern CDMA interference-shared reverse link, including (a) link quality assurance, (b) individual congestion control, (c) variable data rate transition policy, and/or (d) reverse link partitioning. Link quality assurance is provided by monitoring transmission feedback information (ACK/NACK) to indirectly determine the quality of a communication link. Wireless devices are individually targeted to perform congestion control of the reverse link. Variable data transmission rates and discontinuous transmissions are achieved by individual wireless devices that autonomously adjust their transmission rate and transmit power. The reverse link can also be partitioned among the different wireless devices by individually controlling the transmit power of the wireless devices operating on the reverse link.

    摘要翻译： 公开了一种新颖的MAC算法，其具有用于现代CDMA干扰共享反向链路的各种特征，包括（a）链路质量保证，（b）个体拥塞控制，（c）可变数据速率转换策略和/或（d）反向 链接分区。 通过监视传输反馈信息（ACK / NACK）来间接地确定通信链路的质量来提供链路质量保证。 无线设备被单独定向以执行反向链路的拥塞控制。 可变数据传输速率和不连续传输通过自主调整其传输速率和传输功率的各个无线设备实现。 也可以通过单独控制在反向链路上操作的无线设备的发射功率，在不同的无线设备之间对反向链路进行分区。

    SYSTEM AND PROCESS FOR TRANSMIT DIVERSITY IN SATELLITE PHONES
    80.
    发明申请
    SYSTEM AND PROCESS FOR TRANSMIT DIVERSITY IN SATELLITE PHONES 审中-公开
    卫星电话发射多样性的系统与​​过程

    公开(公告)号：US20100302991A1

    公开(公告)日：2010-12-02

    申请号：US12749686

    申请日：2010-03-30

    申请人： Ahmad Jalali ,  Harris S. Simon

    发明人： Ahmad Jalali ,  Harris S. Simon

    IPC分类号： H04W88/02 ,  H04L1/02 ,  H04B1/02

    CPC分类号： H04B7/0608 ,  H04B7/061

    摘要： An apparatus and method inexpensively implements spatial diversity in a wireless terminal for use in a satellite communication system. A single transmit chain is coupled to a plurality of antennas through a switch for sequentially selecting each of the antennas during corresponding sub-frames of a data frame. Here, each sub-frame is adapted for transmission of a respective portion of an encoded information packet, encoded such that the entire information packet is recoverable from any one of the sub-frames.

    摘要翻译： 一种在卫星通信系统中使用的无线终端中廉价地实现空间分集的装置和方法。 单个发射链通过开关耦合到多个天线，用于在数据帧的相应子帧期间顺序选择每个天线。 这里，每个子帧适于传输编码的信息分组的相应部分，被编码为使得整个信息分组可从任何一个子帧中恢复。