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公开(公告)号：US5956619A
公开(公告)日：1999-09-21
申请号：US764565
申请日：1996-12-12
Applicant: Vijaya K Gallagher , Paul A Monte , Robert A Wiedeman
Inventor： Vijaya K Gallagher , Paul A Monte , Robert A Wiedeman
CPC classification number: H04W52/40 , H04B7/18543
Abstract: A system and method for controlling the transmission power of a user terminal in a satellite communications system of a type that includes a ground segment, comprised of at least one user terminal and at least one terrestrial gateway, and a space segment, comprised of a plurality of satellites in a non-geosynchronous earth orbit. The method includes the steps of (a) transmitting an uplink signal from the user terminal simultaneously to at least two satellites of the space segment and (b) receiving the uplink signal with each of the at least two satellites. The method further includes the steps of (c) determining, in the space segment, a difference value representing a difference between a received signal strength indication and a desired received signal strength indication for each of the at least two satellites; (d) in response to the difference value, generating in the space segment at least one power control command for use by the user terminal; (e) transmitting the at least one generated power control command from the space segment to the user terminal; and (f) adjusting a transmitted power of the uplink signal in accordance with the at least one power control command.
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公开(公告)号：US5905943A
公开(公告)日：1999-05-18
申请号：US840370
申请日：1997-04-29
Applicant: Robert A Wiedeman , Vijaya K Gallagher , John A Serri
Inventor： Robert A Wiedeman , Vijaya K Gallagher , John A Serri
CPC classification number: H04B7/18532 , H04B7/18513 , Y02B60/50
Abstract: A method for defining a radio frequency map to be used to isolate negative effects of undesirable radio frequency emitters on radio device communications handheld and stationary. The method includes the steps of measuring C-band power corresponding to an L-band beam as part of an L-band footprint of a communication satellite, calculating various identifiable interference errors associated with the signal transmission path, and subtracting the interference errors from the original C-band power measurement resulting in a power value corresponding to undesirable radio frequency emitter interference at the location of the L-band beam. The resultant radio frequency map can then be used to reallocate frequency channels of operation used by radio devices, mobile phones for example, resulting in power savings in the radio device while maintaining a suitable signal-to-noise ratio.
Abstract translation: 一种用于定义用于分离无线电设备通信手持和固定的不需要的射频发射器的负面影响的射频图的方法。 该方法包括以下步骤：测量与L波段波束相对应的C波段功率，作为通信卫星的L波段覆盖区的一部分，计算与信号传输路径相关联的各种可识别的干扰误差，以及从 原始C波段功率测量导致在L波段波束位置处对应于不期望的射频发射机干扰的功率值。 然后，所得到的射频图可以用于重新分配由无线电设备，移动电话使用的操作频率信道，导致无线电设备中的功率节省，同时保持适当的信噪比。
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公开(公告)号：US6125260A
公开(公告)日：2000-09-26
申请号：US169407
申请日：1998-10-09
Applicant: Robert A Wiedeman , Vijaya K Gallagher , John A Serri
Inventor： Robert A Wiedeman , Vijaya K Gallagher , John A Serri
CPC classification number: H04B7/18532 , H04B7/18513 , Y02B60/50
Abstract: A method is for defining a radio frequency map to be used to isolate negative effects of undesirable radio frequency emitters on radio device communications, handheld and stationary. The method includes the steps of measuring C-band power corresponding to an L-band beam as part of an L-band footprint of a communication satellite, calculating various identifiable interference errors associated with the signal transmission path, and subtracting the interference errors from the original C-band power measurement resulting in a power value corresponding to undesirable radio frequency emitter interference at the location of the L-band beam. The resultant radio frequency map can then be used to reallocate frequency channels of operation used by radio devices, mobile phones for example, resulting in power savings in the radio device while maintaining a suitable signal-to-noise ratio.
Abstract translation: 一种方法是定义用于分离无线电设备通信，手持和静态的不期望的射频发射器的负面影响的射频图。 该方法包括以下步骤：测量与L波段波束相对应的C波段功率，作为通信卫星的L波段覆盖区的一部分，计算与信号传输路径相关联的各种可识别的干扰误差，以及从 原始C波段功率测量导致在L波段波束位置处对应于不期望的射频发射机干扰的功率值。 然后，所得到的射频图可以用于重新分配由无线电设备，移动电话使用的操作频率信道，导致无线电设备中的功率节省，同时保持适当的信噪比。
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4.发明授权
公开(公告)号：US6085067A
公开(公告)日：2000-07-04
申请号：US256038
申请日：1999-02-23
Applicant: Vijaya K Gallagher , Paul A Monte , Robert A Wiedeman
Inventor： Vijaya K Gallagher , Paul A Monte , Robert A Wiedeman
CPC classification number: H04W52/40 , H04B7/18543
Abstract: A system and method for controlling the transmission power of a user terminal in a satellite communications system of a type that includes a ground segment, comprised of at least one user terminal and at least one terrestrial gateway, and a space segment, comprised of a plurality of satellites in a non-geosynchronous earth orbit. The method includes the steps of (a) transmitting an uplink signal from the user terminal simultaneously to at least two satellites of the space segment and (b) receiving the uplink signal with each of the at least two satellites. The method further includes the steps of (c) determining, in the space segment, a difference value representing a difference between a received signal strength indication and a desired received signal strength indication for each of the at least two satellites; (d) in response to the difference value, generating in the space segment at least one power control command for use by the user terminal; (e) transmitting the at least one generated power control command from the space segment to the user terminal; and (f) adjusting a transmitted power of the uplink signal in accordance with the at least one power control command.
Abstract translation: 一种用于控制卫星通信系统中的用户终端的发射功率的系统和方法，所述卫星通信系统包括由至少一个用户终端和至少一个地面网关组成的接地段，以及由多个 的非地球同步地球轨道的卫星。 该方法包括以下步骤：（a）将来自用户终端的上行链路信号同时发送到空间段的至少两颗卫星;（b）用至少两颗卫星中的每一个接收上行链路信号。 该方法还包括以下步骤：（c）在空间段中确定表示所述至少两颗卫星中的每一个的接收信号强度指示和期望的接收信号强度指示之间的差的差值; （d）响应于所述差值，在所述空间段中生成至少一个用户终端使用的功率控制命令; （e）将所述至少一个生成的功率控制命令从所述空间段发送到所述用户终端; 以及（f）根据所述至少一个功率控制命令来调整所述上行链路信号的发射功率。
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公开(公告)号：US6023463A
公开(公告)日：2000-02-08
申请号：US197859
申请日：1998-11-23
Applicant: Robert A. Wiedeman , Paul A Monte , Vijaya K Gallagher
Inventor： Robert A. Wiedeman , Paul A Monte , Vijaya K Gallagher
CPC classification number: H04B7/18513
Abstract: A method is disclosed for operating a first satellite communications system of a type that operates co-frequency with at least one second transmission system, such as a second satellite communications system. The method includes steps, executed during the operation of the first satellite communications system, of measuring at a plurality of locations within a coverage area of the first system an amount of interference resulting at least in part from the at least one second transmission system, the amount of interference being measured over a band of frequencies allocated to the first system; (b) transmitting an indication of the measured interference from each location to a central site; and (c) in accordance with the transmitted indications, assigning at least one user terminal to a sub-band of frequencies within the band of frequencies so as to reduce an amount of interference experienced by the user terminal.
Abstract translation: 公开了一种用于操作与诸如第二卫星通信系统的至少一个第二传输系统进行同频操作的类型的第一卫星通信系统的方法。 该方法包括在第一卫星通信系统的操作期间执行的步骤，在第一系统的覆盖区域内的多个位置处测量至少部分地来自至少一个第二传输系统的干扰量， 在分配给第一系统的频带上测量的干扰量; （b）将所测量的干扰的指示从每个位置发送到中心站点; 以及（c）根据发送的指示，将至少一个用户终端分配给频带内的频率子带，以减少用户终端经历的干扰量。
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公开(公告)号：US5875180A
公开(公告)日：1999-02-23
申请号：US796226
申请日：1997-02-06
Applicant: Robert A. Wiedeman , Paul A Monte , Vijaya K Gallagher
Inventor： Robert A. Wiedeman , Paul A Monte , Vijaya K Gallagher
CPC classification number: H04B7/18513
Abstract: A method is disclosed for operating a first satellite communications system of a type that operates co-frequency with at least one second transmission system, such as a second satellite communications system. The method includes steps, executed during the operation of the first satellite communications system, of measuring at a plurality of locations within a coverage area of the first system an amount of interference resulting at least in part from the at least one second transmission system, the amount of interference being measured over a band of frequencies allocated to the first system; (b) transmitting an indication of the measured interference from each location to a central site; and (c) in accordance with the transmitted indications, assigning at least one user terminal to a sub-band of frequencies within the band of frequencies so as to reduce an amount of interference experienced by the user terminal.
