公开(公告)号：US20110103273A1

公开(公告)日：2011-05-05

申请号：US12720189

申请日：2010-03-09

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H04J1/00

CPC classification number: H04B7/0608 ,  H04B7/0604 ,  H04B7/0691 ,  H04B7/0871 ,  H04B7/0877

Abstract: A Frequency Division Duplex (FDD) wireless terminal includes spaced-apart antennas that are configured to transmit over a return link and to receive over a forward link that is spaced apart from the return link in frequency. The FDD wireless terminal is configured to selectively refrain from transmitting over the return link from at least one of the spaced-apart antennas of the FDD wireless terminal in response to differentials in forward link power that is received at the spaced-apart antennas of the FDD wireless terminal, that are caused, for example, by blocking appendages of a user of the wireless terminal. Related methods are also described.

Abstract translation: 频分双工（FDD）无线终端包括间隔开的天线，其被配置为通过返回链路进行发送，并且在频率上通过与返回链路间隔开的前向链路进行接收。 FDD无线终端被配置为响应于在FDD的间隔天线处接收到的前向链路功率的差异，选择性地避免通过返回链路从FDD无线终端的间隔开的天线中的至少一个发送 无线终端，例如通过阻止无线终端的用户的附加而引起。 还描述了相关方法。

公开(公告)号：US20100210262A1

公开(公告)日：2010-08-19

申请号：US12763552

申请日：2010-04-20

Applicant: Peter D. Karabinis ,  Boris Bogatin ,  Brian M. Deobald ,  Santanu Dutta

Inventor： Peter D. Karabinis ,  Boris Bogatin ,  Brian M. Deobald ,  Santanu Dutta

IPC: H04W40/02

CPC classification number: H04W52/42 ,  H04B7/026 ,  H04B7/0491 ,  H04B7/0837 ,  H04B7/0854 ,  H04B7/10 ,  H04B7/18584 ,  H04W52/38

Abstract: A radioterminal system includes a server that contains a listing of satellite spot beams and registration information for radioterminals. The listing of satellite spot beams includes an association of base stations with each satellite spot beam of the listing of satellite spot beams. Related methods are also provided.

Abstract translation: 无线电终端系统包括一个包含卫星射束列表和无线电终端注册信息的服务器。 卫星点波束的列表包括基站与卫星点波束列表中的每个卫星点波束的关联。 还提供了相关方法。

公开(公告)号：US20060075203A1

公开(公告)日：2006-04-06

申请号：US10538371

申请日：2003-12-09

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: G06F12/00

CPC classification number: G06F5/065 ,  G06F2205/066

Abstract: A buffer management system (100) partitions a total memory space (200) into a programmable number of substantianially uniform size buffers (220-223). An application communicates the desired number of buffers to the buffer management system (200), then allocates these buffers among the data-transfer paths used by the application. Optionally, multiple uniform-size buffers can be merged to form a single logical buffer. By effecting the partitioning of the total memory space (200) into uniform-size buffers (220-223), the overhead required to manage the multiple buffers is minimized. By providing a selected number of managed buffers to an application, the application is able to allocate buffers as required, without having to be concerned with the details of buffer management.

Abstract translation: 缓冲器管理系统（100）将总存储器空间（200）分割成可编程数量的基本上均匀的大小缓冲器（220-223）。 应用程序将期望数量的缓冲器传送到缓冲器管理系统（200），然后在应用程序使用的数据传送路径之间分配这些缓冲区。 可选地，可以将多个均匀大小的缓冲器合并以形成单个逻辑缓冲器。 通过将总存储器空间（200）划分为均匀大小的缓冲器（220-223），管理多个缓冲器所需的开销被最小化。 通过向应用程序提供所选数量的托管缓冲区，应用程序能够根据需要分配缓冲区，而无需关心缓冲区管理的细节。

公开(公告)号：US20060040613A1

公开(公告)日：2006-02-23

申请号：US11200609

申请日：2005-08-10

Applicant: Peter Karabinis ,  Santanu Dutta

Inventor： Peter Karabinis ,  Santanu Dutta

IPC: H04B7/185

CPC classification number: H04B7/18563 ,  H04B7/18513

Abstract: A first and/or a second communications system may provide communications service over a geographic area. A method of operating the first and/or the second communications systems may include generating a measure of aggregate interference reaching a satellite of the second communications system substantially from devices of the first communications system. The measure of aggregate interference reaching the satellite of the second communications system may be transmitted to an element of the first communications system.

Abstract translation: 第一和/或第二通信系统可以在地理区域上提供通信服务。 操作第一和/或第二通信系统的方法可以包括基本上从第一通信系统的设备生成到达第二通信系统的卫星的聚合干扰的度量。 到达第二通信系统的卫星的聚合干扰的测量可以被发送到第一通信系统的元件。

公开(公告)号：US20050260947A1

公开(公告)日：2005-11-24

申请号：US11126799

申请日：2005-05-11

Applicant: Peter Karabinis ,  Santanu Dutta ,  Gary Churan

Inventor： Peter Karabinis ,  Santanu Dutta ,  Gary Churan

IPC: H04B7/04 ,  H04B7/10 ,  H04B7/185

CPC classification number: H04B7/18515 ,  H04B7/0408 ,  H04B7/10 ,  H04B7/2041

Abstract: A processor for use in a satellite communications system includes a selector that is configured to select a subset of a plurality of spatially diverse satellite signals based upon a location of a radioterminal. The processor further includes a signal processor that is configured to detect a return-link transmission from the radioterminal responsive to the selected subset of the spatially diverse satellite signals. The respective spatially diverse satellite signals may include respective signals corresponding to respective antenna elements of a satellite. The selector and the signal processor may be ground based.

Abstract translation: 一种用于卫星通信系统的处理器包括一个选择器，其被配置为基于无线电终端的位置来选择多个空间多样的卫星信号的子集。 处理器还包括信号处理器，其被配置为响应于所选择的空间多样性卫星信号的子集，从无线电终端检测返回链路传输。 相应的空间多样的卫星信号可以包括对应于卫星的各个天线元件的相应信号。 选择器和信号处理器可以是基于地面的。

公开(公告)号：US06301232B1

公开(公告)日：2001-10-09

申请号：US09233179

申请日：1999-01-20

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H04B7212

CPC classification number: H04B7/18513

Abstract: A method configures at least one channel group of a communication system. The channel group includes at least one forward channel and at least one return channel. A central station transmits data over the forward channel to a plurality of terminals, and transmissions by each terminal to the central station occur on a return channel. The method configures at least one channel group to include each forward channel and a selected number of return channels, which configuration is responsive to message traffic projections of each return channel. The selected number of return channels is generally limited to a maximum number of return channels when capacity of each forward channel of the channel group becomes exhausted.

Abstract translation: 一种方法配置通信系统的至少一个信道组。 信道组包括至少一个前向信道和至少一个返回信道。 中心站通过前向信道发送数据到多个终端，并且每个终端向中心站的传输发生在返回信道上。 该方法配置至少一个信道组以包括每个前向信道和选择数量的返回信道，该配置响应每个返回信道的消息流量预测。 当信道组的每个前向信道的容量耗尽时，所选择的返回信道数通常被限制为最大返回信道数。

公开(公告)号：US5450447A

公开(公告)日：1995-09-12

申请号：US954640

申请日：1992-09-30

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H03J7/02 ,  H03L7/087 ,  H03L7/095 ,  H03L7/107 ,  H03L7/113 ,  H04L27/227 ,  H04L27/06

CPC classification number: H04L27/2273 ,  H03J7/02 ,  H03L7/107 ,  H03L7/113 ,  H03L7/087 ,  H03L7/095

Abstract: An apparatus and method for improving the performance of a satellite communications modem is disclosed. The invention is particularly applicable to mobile satellite receivers, and includes a variable-gain automatic frequency controlled (AFC) loop, the gain of which is controlled adaptively, based on the AFC lock status and the lock status of the modem's inner loop, in addition to other parameters determined by the invention.

Abstract translation: 公开了一种改善卫星通信调制解调器性能的装置和方法。 本发明特别适用于移动卫星接收机，并且包括基于AFC锁定状态和调制解调器的内部循环的锁定状态自适应地控制增益的可变增益自动频率控制（AFC）循环，另外 涉及本发明确定的其它参数。

公开(公告)号：US11894911B2

公开(公告)日：2024-02-06

申请号：US17300542

申请日：2021-08-10

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H04B7/185

CPC classification number: H04B7/18515 ,  H04B7/18513

Abstract: Methods and systems for low earth orbit satellite communications, utilizing fractionated satellites and constellations with large baselines. The latter, combined with spatial multiplexing protocols, provides access to user equipment on the ground with much greater spatial resolution than hitherto possible. Methods include overcoming the problem posed by the round-trip delay of satellite links when adaptive, downlink, beamforming is attempted in Frequency Division Duplex (FDD) systems. Methods include using of uplink and downlink pilot signals which eliminate the need for controlling the physical integrity of the fractionated satellite through an electromechanical servo-control system in space.

公开(公告)号：US08526941B2

公开(公告)日：2013-09-03

申请号：US11770063

申请日：2007-06-28

Applicant: Michael Tseytlin ,  Santanu Dutta

Inventor： Michael Tseytlin ,  Santanu Dutta

IPC: H04W4/00 ,  H04W40/00 ,  H04W36/00

CPC classification number: H04B7/18591

Abstract: Communications between a terminal and a terrestrial base station are established. The terrestrial base station receives a request to monitor a satellite base station from the terminal. The terrestrial base station grants the request and receives monitoring information for the satellite base station corresponding to the request. Granting of the request may include suspending transmission from the terrestrial base station to the terminal for a period of time sufficient to allow the terminal to request the monitoring information from the satellite base station and receiving monitoring information may include receiving the requested monitoring information at the terrestrial base station via a communications path not including the terminal. Suspending transmission from the terrestrial base station to the terminal may be followed by resuming transmission to the terminal before receiving the monitoring information at the terrestrial base station. The communications path not including the terminal may include a terrestrial Access Service Network Gateway serving the terrestrial base station and a satellite Access Service Network Gateway serving the satellite base station. Handover techniques are also described.

Abstract translation: 建立终端与地面基站之间的通信。 地面基站从终端接收到监视卫星基站的请求。 地面基站授予该请求，并接收对应于该请求的卫星基站的监视信息。 授予请求可以包括暂停从地面基站向终端的传输一段时间，以足以允许终端从卫星基站请求监视信息，并且接收监视信息可以包括在陆地接收请求的监视信息 基站通过不包括终端的通信路径。 在地面基站接收到监视信息之前，可以暂停从地面基站到终端的传输。 不包括终端的通信路径可以包括为地面基站服务的地面接入服务网络网关和为卫星基站服务的卫星接入服务网络网关。 还描述了切换技术。

公开(公告)号：US08433241B2

公开(公告)日：2013-04-30

申请号：US12536084

申请日：2009-08-05

Applicant: Santanu Dutta ,  Gary G. Churan ,  Dunmin Zheng ,  Serge Nguyen

Inventor： Santanu Dutta ,  Gary G. Churan ,  Dunmin Zheng ,  Serge Nguyen

IPC: H04B7/185

CPC classification number: H04B7/18513 ,  H04B7/18563 ,  H04B7/18591

Abstract: A communications system includes a space-based network (SBN) including a plurality of spotbeams using a first set of frequencies and an ancillary terrestrial network (ATN) including a plurality of base stations using a second set of radio frequencies. In a coverage zone of a given spot beam wherein the SBN and the ATN use at least one frequency from the first and second sets of frequencies in common, the SBN uses a narrower bandwidth than the ATN on both forward and return links, the ATN employs frequency spreading on at least its return link communications, the SBN employs spatial beam nulling directed toward at least one ancillary terrestrial component (ATC) of the ATN, the SBN employs forward link margin control, the ATN employs return link power control, the SBN employs return link power control and base stations of the ATN provide isolation in the direction of at least one satellite of the SBN. Using such a combination of measures, the ATN and the SBN may support completely or partially overlapping use of the first and second sets of radio frequencies.

Abstract translation: 通信系统包括基于空间的网络（SBN），其包括使用第一组频率的多个点波束和包括使用第二组射频的多个基站的辅助地面网络（ATN）。 在给定点波束的覆盖区域中，SBN和ATN使用来自第一和第二组频率的至少一个频率，SBN在前向链路和返回链路上使用比ATN更窄的带宽，ATN使用 SBN至少对其返回链路通信进行频率扩展，SBN采用针对ATN的至少一个辅助地面分量（ATC）的空间波束归零，SBN采用前向链路边缘控制，ATN采用返回链路功率控制，SBN采用 返回链路功率控制和ATN的基站在SBN的至少一个卫星的方向上提供隔离。 使用这种措施的组合，ATN和SBN可以支持第一和第二组无线电频率的完全或部分重叠的使用。