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    • 5. 发明申请
    • Method And Apparatus For Interference Suppression In Orthogonal Frequency Division Multiplexed (OFDM) Wireless Communication Systems
    • 用于正交频分复用(OFDM)无线通信系统中的干扰抑制的方法和装置
    • US20160181693A1
    • 2016-06-23
    • US14593262
    • 2015-01-09
    • Tellabs Operations, Inc.
    • Samir KapoorDaniel J. Marchok
    • H01Q3/26H01Q1/24H04B7/08
    • H01Q3/2611H01Q1/246H04B7/086H04L27/2626H04W16/24H04W88/08
    • A method and apparatus for interference suppression in wireless communication systems, especially Orthogonal Frequency Division Multiplexed (OFDM) systems, is presented. The array apparatus includes a two-tier adaptive array system, which provides for both spatial diversity and beamforming at the uplink and includes sub-arrays spaced at a distance sufficient to provide spatial diversity and support beamforming or scanning A Direction of Arrival (DOA) of signals impinging upon the array can be calculated by comparing signals from sub-array elements. Each sub-array can be filtered or beamformed to provide high gain to desired signals received from the DOA (which may be a multipath signal) while simultaneously dampening-out undesired signals, such as co-channel interference (CCI) in the frequency band of operation. The DOA is also used for allocating frequency bins for data signals, such as in an OFDM system, to provide weighted guidelines for bin allocation to maximize received signal power.
    • 提出了一种用于无线通信系统中的干扰抑制的方法和装置,特别是正交频分复用(OFDM)系统。 阵列装置包括两层自适应阵列系统,其在上行链路上提供空间分集和波束成形两者,并且包括在足以提供空间分集并支持波束成形或扫描的距离上间隔的子阵列(DOA) 可以通过比较来自子阵列元件的信号来计算入射到阵列上的信号。 可以对每个子阵列进行滤波或波束成形,以从DOA(其可以是多径信号)接收的期望信号提供高增益,同时衰减不期望的信号,例如在频带中的同频干扰(CCI) 操作。 DOA还用于分配数据信号的频率仓,例如在OFDM系统中,为bin分配提供加权指导以最大化接收信号功率。
    • 7. 发明申请
    • SYSTEM AND METHODS FOR SCALABLE PROCESSING OF RECEIVED RADIO FREQUENCY BEAMFORM SIGNAL
    • 接收无线电频率信号信号的可缩放处理系统与方法
    • US20150188622A1
    • 2015-07-02
    • US14585141
    • 2014-12-29
    • TRUEPATH TECHNOLOGIES, LLC
    • Michael A. Leabman
    • H04B7/185
    • H04B7/18506H01Q1/246H01Q3/2605H01Q3/2611H01Q3/267H04W84/06
    • A system and method for scalable processing of a received radio frequency beamform signal is provided. Such a system and methods is useful in conjunction with long range communication between an airborne platform and a surface base station. The scalable system includes a plurality of antenna elements for receiving a directional beam, including a multiplexed data stream, from a base station. A down converter and analog to digital (A-D) converter may then down convert and digitize the multiplexed data stream. A digital splitter may de-multiplex the multiplexed data stream into multiple data streams which are orthogonal to one another. The de-multiplexing may be performed using a fast Fourier transformation on the multiplexed data stream. In these embodiments, the digital splitter divides the multiplexed data stream into frequency groups to de-multiplexing the multiplexed data stream into multiple data streams. The system may also include more than one digital signal processors configured to process the multiple data streams. As the bandwidth of the original multiplexed signal increases, so too can the number of digital signal processors be increased.
    • 提供了一种用于接收的射频波束形式信号的可伸缩处理的系统和方法。 这样的系统和方法与机载平台和表面基站之间的远程通信相结合是有用的。 可扩展系统包括用于从基站接收包括复用数据流的定向波束的多个天线元件。 下变频器和模数(A-D)转换器然后可以下转换和数字化复用的数据流。 数字分路器可将多路复用的数据流解复用为彼此正交的多个数据流。 解复用可以使用复用数据流上的快速傅里叶变换来执行。 在这些实施例中,数字分组器将复用的数据流分成频率组,以将复用的数据流解复用为多个数据流。 该系统还可以包括被配置成处理多个数据流的多于一个的数字信号处理器。 随着原始复用信号的带宽的增加,数字信号处理器的数量也将增加。
    • 8. 发明授权
    • System and methods for media access control optimization for long range wireless communication
    • 用于远程无线通信的媒体访问控制优化的系统和方法
    • US08880059B2
    • 2014-11-04
    • US12830329
    • 2010-07-04
    • Michael A. Leabman
    • Michael A. Leabman
    • H04W4/00H01Q3/26H04B7/185H01Q1/24H04W84/06
    • H04B7/18506H01Q1/246H01Q3/2605H01Q3/2611H01Q3/267H04W84/06
    • A system and method for media access control optimization for long distance wireless communication between an airborne platform and a surface base station is provided. The system includes receiving an incoming beamform signal. The incoming beamform signal includes a data portion and a token. It is possible, in some embodiments, that the data portion and the token are independently modulated. The token identifies a subsequent transmitter by including any of: an identification of which transmitter is to transmit next, length of time the next transmitter should transmit for, and transmit timing data. The system may then transmit an outgoing beamform signal including a data portion and a token. After which the system may wait for a return transmission, or a timeout. The system may also be enabled, in some embodiments, to maintain a list of active transmitters. This list of active transmitters may be updated periodically by adding and removing particular transmitters according to successful response transmissions.
    • 提供了一种用于机载平台和表面基站之间的远距离无线通信的媒体访问控制优化的系统和方法。 该系统包括接收进入的波束形成信号。 输入波束形成信号包括数据部分和令牌。 在一些实施例中,可以独立地调制数据部分和令牌。 该令牌通过包括以下任何一个来标识随后的发射机:下一个发射机将要发射的哪个发射机的标识,下一个发射机应该发射的时间长度,以及发射定时数据。 然后,系统可以发送包括数据部分和令牌的输出波束形成信号。 之后系统可能会等待返回传输或超时。 在一些实施例中,还可以启用该系统以维护有源发射机的列表。 可以通过根据成功的响应传输添加和去除特定发射机来周期性地更新活动发射机的列表。
    • 9. 发明申请
    • AUTOMATIC HIGH-RESOLUTION ADAPTIVE BEAM-STEERING
    • 自动高分辨率自适应光束转向
    • US20140266894A1
    • 2014-09-18
    • US14217351
    • 2014-03-17
    • Irshad RasheedChristopher T. Schiller
    • Irshad RasheedChristopher T. Schiller
    • H01Q3/34
    • H01Q3/34G01S19/21H01Q3/22H01Q3/2611H01Q3/2647
    • A method includes pointing a receive beam of a retro-directive antenna array attracted to a jammer circuit instead of a remote transmitter away from the jammer circuit toward the remote transmitter by a first angle based on coarse manual means therefor implemented in electronic circuitry associated with the retro-directive antenna array. The electronic circuitry includes a number of mixers, each of which is configured to mix a Local Oscillator (LO) signal generated from a Voltage Controlled Oscillator (VCO) with a signal received at an antenna element of the retro-directive antenna array. The method also includes automatically fine pointing the receive beam toward the remote transmitter by a second angle following the coarse pointing thereof by the first angle such that the receive beam exactly points to, and tracks, the remote transmitter. The automatic fine pointing is effected through a secondary automatic servo loop implemented in the electronic circuitry.
    • 一种方法包括将基于粗略手动装置的反向指示性天线阵列的接收波束指向干扰电路而不是远离干扰电路远离干扰电路的远程发射机的接收波束以第一角度指示,该手动装置在与电子电路相关联的电子电路中实现 复古天线阵列。 电子电路包括多个混频器,每个混频器被配置为将从压控振荡器(VCO)产生的本地振荡器(LO)信号与在后向天线阵列的天线元件处接收的信号混合。 该方法还包括将接收波束自动精细地指向远程发射机,第二角度遵循其粗略指向第一角度,使得接收波束精确地指向并跟踪远程发射机。 通过在电子电路中实现的二次自动伺服回路实现自动精细定位。
    • 10. 发明申请
    • GNSS POSITIONING SYSTEM INCLUDING AN ANTI-JAMMING ANTENNA AND UTILIZING PHASE CENTER CORRECTED CARRIER
    • GNSS定位系统,包括防抱死天线和使用相位中心校正载波
    • US20130241768A1
    • 2013-09-19
    • US13618522
    • 2012-09-14
    • James L. Petersen
    • James L. Petersen
    • G01S19/44
    • G01S19/44G01S19/21G01S19/23G01S19/36G01S19/43G01S19/54H01Q3/2611
    • A carrier phase correction sub-system for use with a GNSS receiver that utilizes an active null and beam steering controlled radiation pattern antenna (CRPA) determines carrier phase corrections that compensate for antenna phase center movements in the carrier phase measurements taken from the CRPA filtered signal. The carrier phase sub-system utilizes measured radiation patterns, angles of incidence of the satellite signals at the CRPA, and the applied weights to determine carrier phase corrections to be applied to the CRPA filtered signals from which the carrier phase measurements are later taken or to the carrier phase measurements depending on the dynamics of the jamming signal. With the carrier phase corrected, the GNSS receiver may utilize known RTK techniques to resolve carrier cycle ambiguities.
    • 用于与GNSS接收器一起使用的载波相位校正子系统利用有源零和波束操纵控制辐射模式天线(CRPA)来确定载波相位校正,其补偿从CRPA滤波信号获得的载波相位测量中的天线相位中心移动 。 载波相位子系统利用测量的辐射方向图,在CRPA处的卫星信号的入射角度和所施加的权重,以确定载波相位校正,以应用于后来采用载波相位测量的CRPA滤波信号或 载波相位测量取决于干扰信号的动态。 在载波相位校正的情况下,GNSS接收机可以利用已知的RTK技术来解决载波周期模糊度。