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：US20240396610A1

公开(公告)日：2024-11-28

申请号：US18831046

申请日：2024-05-16

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H04B7/06 ,  H04B7/0413 ,  H04L5/00

Abstract: A wireless communication system using a fractionated LEO satellite, wherein a combination of MIMO and geographic beamforming are used for radio access, and wherein the channel coefficient vectors are adaptively extrapolated in time and frequency to reduce the pilot signal density.

公开(公告)号：US20240187088A1

公开(公告)日：2024-06-06

申请号：US18445635

申请日：2023-12-01

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：US10110288B2

公开(公告)日：2018-10-23

申请号：US12720189

申请日：2010-03-09

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H04B7/06 ,  H04B7/08

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.

公开(公告)号：US09123034B2

公开(公告)日：2015-09-01

申请号：US13862619

申请日：2013-04-15

Applicant: Nils Rydbeck ,  Santanu Dutta

Inventor： Nils Rydbeck ,  Santanu Dutta

IPC: G07B15/00 ,  G07B15/02 ,  G06Q20/14 ,  G08G1/00 ,  G07F17/24 ,  G06Q20/32

CPC classification number: G06Q20/145 ,  G06Q20/3224 ,  G07B15/02 ,  G07F17/246 ,  G08G1/00

Abstract: A method/system of wireless payment of parking fees for a vehicle, applicable to both open street and closed garage parking, wherein the user and checker experiences are enhanced relative to the prior art by a number of means, including: autonomous sensing of the user's/vehicle's location and allowing the user to correct the indicated location if required; enabling a handset to automatically sense the ID of the vehicle in which it is located; enabling rapid and facile enforcement by providing the Checker with information about the location, parking session status and other attributes of parked vehicles and displaying the information on a portable terminal in a manner facilitating rapid validation; and further facilitating the identification of vehicles with expired sessions by a method/system of RF interrogation involving RF tags located in/on the vehicles and the checking terminal querying the RF tags.

Abstract translation: 一种无线支付车辆停车费用的方法/系统，适用于开放式街道和封闭式车库停车场，其中用户和检验员体验相对于现有技术通过多种方式得到增强，包括：自动感测用户的 /车辆的位置，并允许用户在需要时更正指示的位置; 使手机能够自动感测其所在的车辆的ID; 通过向Checker提供关于停放车辆的位置，停车状态和其他属性的信息并以便于快速验证的方式在便携式终端上显示信息，从而实现快速和轻松的执行; 并且通过RF查询的方法/系统进一步促进车辆识别，该方法/系统涉及位于车辆中/车辆上的RF标签和查询RF标签的检查终端。

公开(公告)号：US08761538B2

公开(公告)日：2014-06-24

申请号：US12332240

申请日：2008-12-10

Applicant: Rochelle Pereira ,  Santanu Dutta

Inventor： Rochelle Pereira ,  Santanu Dutta

IPC: G06K9/40 ,  H04N1/32 ,  H04N1/41

CPC classification number: H04N19/117 ,  G06T5/002 ,  G06T5/20 ,  G06T2207/10016 ,  G06T2207/20021 ,  H04N19/14 ,  H04N19/17 ,  H04N19/176 ,  H04N19/182 ,  H04N19/61 ,  H04N19/86

Abstract: In a deblocking operation, pixel values within a first block of pixels are compared, and pixel values in the first block are also compared to pixel values in a second block of pixels that is adjacent to the first block. Based on the results of the comparisons, a digital deblocking filter and a region of interest can be selected, where the region of interest identifies a number of pixels in the first block and a number of pixels in the second block to which the selected filter is to be applied.

Abstract translation: 在解块操作中，比较第一像素块内的像素值，并将第一块中的像素值与与第一块相邻的第二像素块中的像素值进行比较。 基于比较的结果，可以选择数字去块滤波器和感兴趣区域，其中感兴趣区域标识第一块中的像素数目和所选滤波器的第二块中的像素数量 应用。

公开(公告)号：US08670705B2

公开(公告)日：2014-03-11

申请号：US11036637

申请日：2005-01-14

Applicant: Peter D. Karabinis ,  Santanu Dutta ,  Gary G. Churan ,  Dunmin Zheng

Inventor： Peter D. Karabinis ,  Santanu Dutta ,  Gary G. Churan ,  Dunmin Zheng

IPC: H04B7/185

CPC classification number: H04B7/1851

Abstract: First radio signals are received by a first satellite, the received first radio signals including a desired satellite uplink signal transmitted from a first source using a frequency assigned to the first source and an interfering signal transmitted from a second source using the frequency assigned to the first source. The first radio signals are combined based on a first performance criterion to generate a first output signal. Second radio signals are received by a second satellite, the received second radio signals including a measure of the desired signal. The second radio signals are combined based on a second performance criterion to produce a second output signal. The first and second output signals are combined to generate an estimate of the desired satellite uplink signal.

Abstract translation: 第一无线电信号由第一卫星接收，所接收的第一无线电信号包括使用分配给第一源的频率从第一源发送的期望的卫星上行链路信号和使用分配给第一源的频率从第二源发送的干扰信号 资源。 基于第一性能标准来组合第一无线电信号以产生第一输出信号。 第二无线电信号由第二卫星接收，所接收的第二无线电信号包括所需信号的度量。 基于第二性能标准来组合第二无线电信号以产生第二输出信号。 第一和第二输出信号被组合以产生所需卫星上行链路信号的估计。

公开(公告)号：US08520561B2

公开(公告)日：2013-08-27

申请号：US12699466

申请日：2010-02-03

Applicant: Serge Nguyen ,  Santanu Dutta

Inventor： Serge Nguyen ,  Santanu Dutta

IPC: H04J1/00

CPC classification number: H04B7/18539 ,  H04L5/06 ,  H04W72/02 ,  H04W72/0453 ,  H04W84/06

Abstract: In some embodiments, a satellite communications network dynamically regulates carrier assignment for bidirectional communications between a satellite and radioterminals. The satellite communications network includes a resource manager that regulates the carrier assignments by selecting among a plurality of FDD return subcarriers, with potentially different subcarrier bandwidths and supporting different radio access technologies, within at least one FDD return carrier grouping for coupling to a selected one of a plurality of FDD forward carriers, and by controlling the satellite network to receive communications from the radioterminal on the selected FDD return subcarrier and to transmit communications to the radioterminal on the selected FDD forward carrier.

Abstract translation: 在一些实施例中，卫星通信网络动态地调节用于卫星和无线电终端之间的双向通信的载波分配。 卫星通信网络包括资源管理器，该资源管理器通过在多个FDD返回子载波之间选择具有潜在不同子载波带宽并支持不同无线电接入技术的方式来调整载波分配，所述至少一个FDD返回载波分组用于耦合到所选择的一个 多个FDD前向载波，并且通过控制卫星网络从所选择的FDD返回子载波上的无线电终端接收通信，并将通信发送到所选择的FDD前向载波上的无线电终端。

公开(公告)号：US08265549B2

公开(公告)日：2012-09-11

申请号：US11126799

申请日：2005-05-11

Applicant: Peter D. Karabinis ,  Santanu Dutta ,  Gary G. Churan

Inventor： Peter D. Karabinis ,  Santanu Dutta ,  Gary G. Churan

IPC: 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。