公开(公告)号：US20070192805A1

公开(公告)日：2007-08-16

申请号：US11669481

申请日：2007-01-31

Applicant: Santanu Dutta ,  Peter D. Karabinis

Inventor： Santanu Dutta ,  Peter D. Karabinis

IPC: H04N7/20 ,  H04N7/16 ,  H04N7/173

CPC classification number: H04H20/22 ,  H04B7/18563 ,  H04H20/74 ,  H04H40/18

Abstract: Satellite broadcasting methods include providing a cellular satellite communications system configured to transmit information separately to a plurality of different geographic locations defined by a respective plurality of cellular satellite spotbeams, and concurrently transmitting a program signal on a plurality of different spotbeams. The plurality of different spotbeams may include less than a total number of spotbeams of the cellular satellite communications system. The plurality of different spotbeams may be selected adaptively from an available pool of spotbeams based on locations of users requesting the broadcast program signal. Corresponding satellite gateways, broadcast controllers and wireless user terminals are also provided.

Abstract translation: 卫星广播方法包括提供蜂窝式卫星通信系统，其被配置为将信息分别发送到由相应的多个蜂窝卫星点波束定义的多个不同的地理位置，并且同时在多个不同的光束上传送节目信号。 多个不同的光束可以包括少于蜂窝卫星通信系统的光束的总数。 基于请求广播节目信号的用户的位置，可以从可用的光束池自适应地选择多个不同的光束。 还提供对应的卫星网关，广播控制器和无线用户终端。

公开(公告)号：US07203490B2

公开(公告)日：2007-04-10

申请号：US10795620

申请日：2004-03-08

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

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

IPC: H04Q7/20 ,  H04B7/185 ,  H04M1/00

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

Abstract: A satellite is used to route push-to-send messages among terrestrial base stations. Reduced push-to-send delays thereby may be provided, when a source push-to-send radioterminal is widely separated from a destination push-to-send radioterminal. Satellite routing only may be used when the source push-to-send radioterminal and the destination push-to-send radioterminal are not communicating with a single terrestrial base station or with a group of terrestrial base stations that are proximate one another. A destination base station that is communicating with the destination push-to-send radioterminal may be determined at the satellite, at a satellite gateway and/or at a central server.

Abstract translation: 卫星用于在地面基站之间路由推送发送消息。 当源头发送无线电终端与目的地推送无线电终端广泛地分离时，可以提供减少的推送发送延迟。 仅当源推送无线电终端和目的地推送发送无线电终端不与单个地面基站或彼此接近的一组地面基站通信时，才能使用卫星路由。 正在与目的地推送无线电终端进行通信的目的地基站可以在卫星，卫星网关和/或中央服务器处确定。

公开(公告)号：US20050041619A1

公开(公告)日：2005-02-24

申请号：US10914515

申请日：2004-08-09

Applicant: Peter Karabinis ,  Santanu Dutta

Inventor： Peter Karabinis ,  Santanu Dutta

IPC: H04B7/208 ,  H04L5/02 ,  H04L5/14 ,  H04L12/28 ,  H04Q7/00

CPC classification number: H04B7/208 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0064 ,  H04L5/143

Abstract: Wireless Orthogonal Frequency Division Multiplexing and/or Orthogonal Frequency Division Multiple Access (OFDM/OFDMA) and/or Time-Frequency Division Multiplexing and/or Time-Frequency Division Multiple Access (T-FDM/T-FDMA) systems and methods include forward and return link carriers comprising numbers of sub-band carrier groupings that are not identical. A return link carrier may consist of fewer sub-band carriers than a forward link carrier and the return link carrier also may consist of a single sub-band carrier.

Abstract translation: 无线正交频分复用和/或正交频分多址（OFDM / OFDMA）和/或时分多路复用和/或时频分多址（T-FDM / T-FDMA）系统和方法包括前向和 包括不相同的子带载波分组的数目的返回链路载波。 返回链路载波可以包括比前向链路载波更少的子带载波，并且返回链路载波也可以由单个子带载波组成。

公开(公告)号：US06639898B1

公开(公告)日：2003-10-28

申请号：US09318266

申请日：1999-05-25

Applicant: Santanu Dutta ,  David W. Best ,  Dennis W. Sutherland ,  Thomas A. Trebs

Inventor： Santanu Dutta ,  David W. Best ,  Dennis W. Sutherland ,  Thomas A. Trebs

IPC: H04J106

CPC classification number: H04W40/22 ,  H04W40/02 ,  H04W92/10

Abstract: A packet switched multi-mode mobile communication network and fixed and mobile devices for use therewith are disclosed. Each of the mobile vehicle equipment and a base station packet switch are coupled to respective data terminal equipment which generates packet data messages. The packet data messages have message characteristics associated therewith. Each of the mobile vehicle equipment and the base station packet switch have an intelligent switching node incorporated therein for selecting which of a plurality of radio frequency transmission paths to use in transmitting the packet data message to the other of the mobile vehicle equipment and the base station packet switch. Each of the plurality of radio frequency transmission paths has transmission path characteristics associated therewith. The intelligent switching nodes select the radio frequency transmission path as a function of the message characteristics of the packet data message and as a function of the transmission path characteristics of the plurality of radio frequency transmission paths.

Abstract translation: 公开了分组交换多模移动通信网络以及与其一起使用的固定和移动设备。 移动车辆设备和基站分组交换机中的每一个耦合到产生分组数据消息的相应数据终端设备。 分组数据消息具有与其相关联的消息特征。 移动车辆设备和基站分组交换机中的每一个都具有并入其中的智能交换节点，用于选择用于将分组数据消息发送到移动车辆设备和基站中的另一个的多个射频传输路径中的哪一个 分组交换机 多个射频传输路径中的每一个具有与其相关联的传输路径特性。 智能交换节点根据分组数据消息的消息特性和多个射频传输路径的传输路径特性的函数选择射频传输路径。

公开(公告)号：US06587443B1

公开(公告)日：2003-07-01

申请号：US09300422

申请日：1999-04-28

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H04B7212

CPC classification number: H04B7/18532 ,  H04B7/212

Abstract: Data transfer efficiencies of a frequency division and/or time division multiple access (FDMA/TDMA) communication systems are improved over prior art systems by distributing signalling and messaging activities over all return channels of a channel group, by varying forward to return channel data rate ratios, and by reducing message transport delays with respect to prior art communication systems, based on message traffic over such channel group. Return channels of a defined channel group are time division controlled and are generic to operate either in a signalling mode or in a messaging mode. Data rates for the forward channel and the return channels may be selected from predefined combinations of forward and return channel data rates. Message transport delays are reduced over prior art delay periods by reducing the frame lengths of data frames transmitted at a specified frame rate over the forward channel and by transmitting network management data other than time-critical data reception results and time slot allocations periodically at a superframe rate which is less than the frame rate.

Abstract translation: 通过在信道组的所有返回信道上分配信令和消息传送活动，通过改变前向返回信道数据速率来改进频分和/或时分多址（FDMA / TDMA）通信系统的数据传输效率 并且通过基于在这种信道组上的消息流量减少关于现有技术通信系统的消息传输延迟。 定义的通道组的返回通道被时分控制，并且通用以在信令模式或消息传送模式下操作。 可以从前向和返回信道数据速率的预定义组合中选择正向信道和返回信道的数据速率。 通过减少在前向信道上以指定帧速率发送的数据帧的帧长度，并且通过在超帧周期性地周期性地发送除时间关键数据接收结果和时隙分配之外的网络管理数据，从而减少了现有技术延迟周期的消息传输延迟 速率小于帧速率。

公开(公告)号：US06515976B1

公开(公告)日：2003-02-04

申请号：US09055491

申请日：1998-04-06

Applicant: Paul W. Dent ,  Santanu Dutta

Inventor： Paul W. Dent ,  Santanu Dutta

IPC: H04J300

CPC classification number: H04B7/2125 ,  H04J3/0605 ,  H04L7/0004 ,  H04L2007/047

Abstract: A method and apparatus for demodulating a communication signal transmitted at a first rate is provided, wherein the communication signal includes a plurality of addresses and corresponding data packets. The demodulating method includes the steps of receiving the communication signal at a user terminal, identifying which of the plurality of data packets are destined to the receiving user terminal, and demodulating, at a second rate less than the first rate, only the data packets identified as being destined to the receiving user terminal.

Abstract translation: 提供一种用于解调以第一速率发送的通信信号的方法和装置，其中通信信号包括多个地址和对应的数据分组。 解调方法包括以下步骤：在用户终端处接收通信信号，识别多个数据分组中的哪个数据分组去往接收用户终端，并以小于第一速率的第二速率解调仅标识的数据分组 作为注定到接收用户终端。

公开(公告)号：US06420904B1

公开(公告)日：2002-07-16

申请号：US09769075

申请日：2001-01-25

Applicant: Santanu Dutta ,  Deepak Singh

Inventor： Santanu Dutta ,  Deepak Singh

IPC: H03L19096

CPC classification number: H03K19/0966 ,  H03K19/0963

Abstract: The precharge of a domino logic stage is controlled based on the precharge delay of a prior domino logic stage. The precharge of the logic stage does not occur until the output of the prior logic stage corresponds to the precharge logic state. Because the precharge logic state output of a preceding stage is an inactive state of a subsequent logic stage, the logic function of the subsequent logic stage is in a non-conducting state when the output of the prior logic stage is in the precharge logic state. By providing the precharge to a subsequent stage-only after the output of the prior stage is in the precharge state, there can be no DC current flow during the precharge of the subsequent stage, and the need for an evaluation transistor to block the DC current flow during precharge is eliminated. The elimination of the evaluation transistor eliminates the delay introduced by the evaluation transistor in a precharge logic stage, reduces the circuit area for the logic stage, reduces the load on the clock circuit, and reduces the power consumption of each logic stage.

Abstract translation: 多米诺骨牌逻辑阶段的预充电是基于先前的多米诺骨牌阶段的预充电延迟来控制的。 直到逻辑级的输出对应于预充电逻辑状态才会发生逻辑级的预充电。 由于前一级的预充电逻辑状态输出是后续逻辑级的无效状态，所以当现有逻辑级的输出处于预充电逻辑状态时，后续逻辑级的逻辑功能处于非导通状态。 通过向后续阶段提供预充电，仅在前级的输出处于预充电状态之后，在后续级的预充电期间不会有直流电流流动，并且需要评估晶体管来阻断直流电流 预充电期间的流量被消除。 评估晶体管的消除消除了在预充电逻辑级中由评估晶体管引入的延迟，减小了逻辑级的电路面积，减少了时钟电路上的负载，并且降低了每个逻辑级的功耗。

公开(公告)号：US5923648A

公开(公告)日：1999-07-13

申请号：US724116

申请日：1996-09-30

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H04B7/185 ,  H04B7/212

CPC classification number: H04B7/18513

Abstract: Data transfer efficiencies of a frequency division and/or time division multiple access (FDMA/TDMA) communication systems are improved over prior art systems by distributing signalling and messaging activities over all return channels of a channel group, by varying forward to return channel data rate ratios, and by reducing message transport delays with respect to prior art communication systems, based on message traffic over such channel group. Return channels of a defined channel group are time division controlled and are generic to operate either in a signalling mode or in a messaging mode. Data rates for the forward channel and the return channels may by selected from predefined combinations of forward and return channel data rates. Message transport delays are reduced over prior art delay periods by reducing the frame lengths of data frames transmitted at a specified frame rate over the forward channel and by transmitting network management data other than time-critical data reception results and time slot allocations periodically at a superframe rate which is less than the frame rate.

Abstract translation: 通过在信道组的所有返回信道上分配信令和消息传送活动，通过改变前向返回信道数据速率来改进频分和/或时分多址（FDMA / TDMA）通信系统的数据传输效率 并且通过基于在这种信道组上的消息流量减少关于现有技术通信系统的消息传输延迟。 定义的通道组的返回通道被时分控制，并且通用以在信令模式或消息传送模式下操作。 前向信道和返回信道的数据速率可以从前向和返回信道数据速率的预定义组合中选择。 通过减少在前向信道上以指定帧速率发送的数据帧的帧长度，并且通过在超帧周期性地周期性地发送除时间关键数据接收结果和时隙分配之外的网络管理数据，从而减少了现有技术延迟周期的消息传输延迟 速率小于帧速率。

公开(公告)号：US5454007A

公开(公告)日：1995-09-26

申请号：US126847

申请日：1993-09-24

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H03D3/00 ,  H03K9/06

CPC classification number: H03D3/007 ,  H03D2200/005 ,  H03D2200/006

Abstract: An arrangement for generating a digital, downconverted complex baseband signal from a bandpass signal comprises a signal source for providing first and second clock signals at first and second clocking rates, respectively. The first clocking rate is at four times the expected center frequency of the bandpass signal, and the second clocking rate is at an exact subharmonic frequency of the bandpass frequency. The bandpass signal is sampled by a composite sampling event of two sampling pulses which occur once during each period of the second clocking signals and which are time-spaced from each other by the inverse of the first clocking rate. The complex baseband samples are ready as an A/D converter output, with no requirement for DSP processing to complete the downconversion to zero-IF.

Abstract translation: 用于从带通信号产生数字，下变频的复基带信号的装置包括用于分别以第一和第二时钟速率提供第一和第二时钟信号的信号源。 第一时钟速率是带通信号的预期中心频率的四倍，并且第二时钟速率处于带通频率的精确次谐波频率。 通过在第二时钟信号的每个周期期间出现一次的两个采样脉冲的复合采样事件对带通信号进行采样，并且它们通过与第一时钟速率相反的时间间隔。 复杂的基带采样作为A / D转换器输出准备就绪，不需要DSP处理来完成下变频至零中频。