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    Joint optimization of multiple beams for MU MIMO systems
    1.
    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

    Applicant: Ahmad Jalali ,  Kasra Jalali

    Inventor： Ahmad Jalali ,  Kasra Jalali

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

    Abstract: 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.

    JOINT OPTIMIZATION OF MULTIPLE BEAMS FOR MU MIMO SYSTEMS
    2.
    发明申请
    JOINT OPTIMIZATION OF MULTIPLE BEAMS FOR MU MIMO SYSTEMS 审中-公开

    公开(公告)号：US20200329509A1

    公开(公告)日：2020-10-15

    申请号：US16913995

    申请日：2020-06-26

    Applicant: Ahmad Jalali ,  Kasra Jalali

    Inventor： Ahmad Jalali ,  Kasra Jalali

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

    Abstract: 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 of the uplink probe received 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 between each UE and the BS. 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.

    SYSTEMS AND METHODS FOR A WIRELESS BROADBAND ACCESS SYSTEM
    3.
    发明公开
    SYSTEMS AND METHODS FOR A WIRELESS BROADBAND ACCESS SYSTEM 审中-公开

    公开(公告)号：US20240236963A9

    公开(公告)日：2024-07-11

    申请号：US18383224

    申请日：2023-10-24

    Applicant: Ahmad Jalali

    Inventor： Ahmad Jalali

    IPC: H04W72/0453 ,  H04W72/541

    CPC classification number: H04W72/0453 ,  H04W72/541

    Abstract: A communications apparatus comprises of one or more Active Antenna Units (AAUs) collocated in the same sector, and a processor. The processor de-multiplexes a data packet stream into at least two sub-streams, each sub-stream is transmitted on a different medium path. Each medium path is comprised of frequency channels, antenna polarizations and AAUs. A scheduler assigns data packets to different medium paths. The apparatus transmits on at least one frequency band, each frequency band is divided into a set of one or more frequency channels, at least one frequency channel of a frequency band is assigned to at least one AAU. A frequency channel is assigned to only one or to both antenna polarizations of the same AAU. The apparatus determines if an extraneous signal is present on a frequency channel and stops transmitting on the entire or part of the frequency channel where extraneous signal is detected.

    SIGNALING AND PROCEDURES FOR FAST AND LOW OVERHEAD HANDOVER FOR MU MIMO SYSTEMS
    4.
    发明申请
    SIGNALING AND PROCEDURES FOR FAST AND LOW OVERHEAD HANDOVER FOR MU MIMO SYSTEMS 有权

    公开(公告)号：US20210392558A1

    公开(公告)日：2021-12-16

    申请号：US16900572

    申请日：2020-06-12

    Applicant: Ahmad Jalali

    Inventor： Ahmad Jalali

    IPC: H04W36/30 ,  H04L5/00 ,  H04W24/08 ,  H04L1/18

    Abstract: A User Equipment (UE) measures the signal quality of a dedicated downlink reference signal transmitted by a Base Station (BS) to the UE. If the signal quality is below a threshold, the UE initiates a measurement procedure to determine a target handover BS. The UE sequentially transmits an uplink reference signal on each of UE's beams. The BSs estimate the Angle of Arrival (AoA) of any received uplink reference signal, form a dedicated downlink beam pointed toward the AoA and transmit an acknowledgment to the UE on the corresponding beam. The UE estimates the signal quality of the received acknowledgements on the different UE beams, and transmits a handover message on the UE beam on which the acknowledgement with the highest signal quality is received. The uplink reference signal may comprise of a single preamble. The acknowledgement may comprise of a preamble, or a preamble followed by a small payload.

    Air interface protocols for broadband access to aerial platforms
    5.
    发明授权
    Air interface protocols for broadband access to aerial platforms 有权

    公开(公告)号：US10389431B2

    公开(公告)日：2019-08-20

    申请号：US16205641

    申请日：2018-11-30

    Applicant: Ahmad Jalali

    Inventor： Ahmad Jalali

    IPC: H04B7/212 ,  H04B7/185 ,  H04L27/36 ,  H04W72/04 ,  H04W72/08 ,  H04W16/28 ,  H04W84/00

    Abstract: An air interface for a terrestrial communications network for providing broadband internet access to aerial platforms is described. In some embodiments, systems and methods are described for efficient retransmission of data packets that are not received correctly. In other embodiments, systems and methods are described for determining the modulation constellation and error correction code rate used in transmitting a data packet to maximize data rates. In another set of embodiments, the retransmission scheme and modulation constellation and error correction code rate determination are jointly optimized to maximize data rates.

    Location based services provided via unmanned aerial vehicles (UAVs)
    6.
    发明授权
    Location based services provided via unmanned aerial vehicles (UAVs) 有权

    公开(公告)号：US09807569B2

    公开(公告)日：2017-10-31

    申请号：US14533756

    申请日：2014-11-05

    Applicant: Ahmad Jalali

    Inventor： Ahmad Jalali

    IPC: H04W24/00 ,  H04W4/04 ,  G01S5/02 ,  G06Q10/08 ,  G01S5/14 ,  G01S13/87 ,  H04B7/185 ,  H04W64/00

    CPC classification number: H04W4/046 ,  G01S5/02 ,  G01S5/14 ,  G01S13/876 ,  G06Q10/0833 ,  H04B7/18502 ,  H04W64/003

    Abstract: An automated method of determining a location of an aerial platform is described. The method includes: transmitting, from the aerial platform, a first pilot signal; receiving, at a set of ground devices, the first pilot signal; determining a first set of values based on measurements associated with the first pilot signal; and calculating a position of the aerial platform based at least partly on the first set of values. An automated method adapted to determine a location of a ground device includes: transmitting, from the ground device, a first pilot signal; receiving, at each aerial platform in a set of aerial platforms, the first pilot signal; determining a first set of values based on measurements associated with the first pilot signal; and calculating a position of the ground device based at least partly on the first set of values. A system adapted to provide location information is described.

    Provision of broadband access to airborne platforms
    8.
    发明授权
    Provision of broadband access to airborne platforms 有权
    提供宽带接入机载平台

    公开(公告)号：US09385803B2

    公开(公告)日：2016-07-05

    申请号：US14228640

    申请日：2014-03-28

    Applicant: Ahmad Jalali

    Inventor： Ahmad Jalali

    IPC: H04B7/185 ,  H04W40/22 ,  H04W84/06

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

    Abstract: 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.

    Abstract translation: 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。

    Unmanned Aerial Vehicle Communication Using Distributed Antenna Placement and Beam Pointing
    9.
    发明申请
    Unmanned Aerial Vehicle Communication Using Distributed Antenna Placement and Beam Pointing 审中-公开
    使用分布式天线放置和光束指向的无人飞行器通信

    公开(公告)号：US20150237569A1

    公开(公告)日：2015-08-20

    申请号：US14609207

    申请日：2015-01-29

    Applicant: Ahmad Jalali

    Inventor： Ahmad Jalali

    IPC: H04W48/16 ,  B64C39/02

    CPC classification number: H04B7/18504 ,  B64C39/024 ,  B64C2201/122 ,  H04B7/1555 ,  H04B7/18506 ,  H04B7/18528 ,  H04B7/18539 ,  H04B7/18541 ,  H04B7/18543 ,  H04B7/18554 ,  H04B7/18578 ,  H04W24/02 ,  H04W36/0005 ,  H04W36/0016 ,  H04W36/0083 ,  H04W36/12 ,  H04W36/30 ,  H04W36/36 ,  H04W48/16 ,  H04W84/005 ,  H04W84/06 ,  H04W88/16 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/164 ,  Y02D70/446

    Abstract: A communication system is described. The system includes: at least one gateway able to provide broadband connectivity, a set of ground terminals, and a set of aerial platforms, where at least one aerial platform is able to communicate with at least one gateway using radio frequencies, each aerial platform is able to communicate with ground terminals using radio frequencies, and each aerial platform is able to communicate with each other aerial platform using radio frequencies. An automated method for determining a beam direction for communication among UAVs includes: dividing a space around the UAV into multiple sub-regions, and, iteratively: selecting a sub-region from among the multiple sub-regions; pointing a signal toward the sub-region; and determining whether a signal is received from another UAV, until all sub-regions from among the multiple sub-regions have been selected.

    Abstract translation: 描述通信系统。 该系统包括：能够提供宽带连接的至少一个网关，一组接地终端和一组高空作业平台，其中至少一个空中平台能够使用无线电频率与至少一个网关通信，每个空中平台是 能够使用无线电频率与地面终端通信，并且每个空中平台能够使用无线电频率与彼此的空中平台通信。 用于确定UAV之间的通信的波束方向的自动化方法包括：将UAV周围的空间划分成多个子区域，并且迭代地：从多个子区域中选择子区域; 指向子区域的信号; 以及确定是否从另一UAV接收到信号，直到所述多个子区域中的所有子区域被选择为止。

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