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公开(公告)号：US5191462A
公开(公告)日：1993-03-02
申请号：US534623
申请日：1990-05-11
CPC分类号： H04L25/061 , H03K5/088 , H04L25/066
摘要： Signal distortion in fiber optic systems is compensated for by forming decisions as to the transmitted information as a joint function of the received signal and of a feedback signal. The latter, in turn, is a function of decisions made for at least one signal transmitted over the fiber. The feedback signal determines the value of a threshold to which the received signal is compared in order to generate the decisions.
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2.发明授权
公开(公告)号：US5388088A
公开(公告)日：1995-02-07
申请号：US862398
申请日：1992-04-02
IPC分类号： G02B6/293 , G02B27/28 , H04B10/02 , H04B10/158 , H04J14/00 , H04J14/04 , H04J14/06 , H04B10/00
CPC分类号： H04J14/06 , H04B10/697
摘要： Transmission capacity of an optical fiber is increased by transmitting two optical signals of orthogonal polarizations through the fiber and distinguishing the signals from one another at the receiver by appropriately weighting polarization components representative of the transmitted signals. The weighted polarization components are summed to provide two output electrical signals that are proportional in magnitude to the two transmitted optical signals. Appropriate weighting of the signals eliminates cross-channel interference and maximizes the signal to noise ratio. Signals of arbitrary received polarizations are detected and separated from one another.
摘要翻译： 通过传输两个通过光纤的正交偏振光信号来增加光纤的传输容量，并通过适当地加权表示发射信号的偏振分量来区分接收机处的信号。 将加权偏振分量相加以提供两个输出电信号，其幅度与两个发送的光信号成比例。 信号的适当加权消除了跨信道干扰并使信噪比最大化。 任意接收极化的信号被检测并彼此分离。
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公开(公告)号：US5299047A
公开(公告)日：1994-03-29
申请号：US862389
申请日：1992-04-02
申请人： Sanjay Kasturia , Jack H. Winters
发明人： Sanjay Kasturia , Jack H. Winters
IPC分类号： G02B6/00 , H04B10/135 , H04B10/18 , H04J14/00 , H04J14/04 , H04J14/06 , H04B10/04 , H04B10/06
CPC分类号： H04B10/25 , H04B10/2569
摘要： Higher information rates are achieved in lightwave communication systems by using optical signals of different polarizations to represent data as ternary digits. Each ternary digit assumes a value, for example, of either zero, logic 1 (e.g., an amplitude of one unit) on a first polarization, or logic 1 on a second polarization. The ternary digits are transmitted to a receiver through a single optical fiber by modulating the optical signals in time with one of these two polarizations or zero. The receiver determines the value of each ternary digit by determining that the received optical signal has a value of either zero or logic one on a particular one of the two polarizations.
摘要翻译： 在光波通信系统中通过使用不同极化的光信号来表示数据作为三进制数字，实现更高的信息速率。 每个三进制数字假定在第一偏振上为零，逻辑1（例如，一个单位的振幅）或第二极化处的逻辑1的值。 通过单个光纤将三进制数字传输到接收机，通过以这两个极化之一或零来及时调制光信号。 接收机通过确定接收到的光信号在两个极化中的特定一个上具有零或逻辑1的值来确定每个三进制数的值。
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4.发明申请公开(公告)号：US20070165734A1
公开(公告)日：2007-07-19
申请号：US11702348
申请日：2007-02-05
申请人： Jose Tellado , Sanjay Kasturia , Eran Cohen
发明人： Jose Tellado , Sanjay Kasturia , Eran Cohen
IPC分类号： H04K1/10
CPC分类号： H04B3/32 , H04L25/03006
摘要： A method and apparatus of joint processing a plurality of digital signal streams is disclosed. The method includes transforming a plurality of the digital signal streams from an original domain to a lower complexity processing domain. The transformed plurality of digital signal streams are joint processed, wherein the joint processing includes multiplying samples of the plurality of transformed digital signal streams by a processing matrix. The joint processed signal streams are inverse transformed back to the original domain. Diagonal elements of the processing matrix are adaptively selected to cancel transmission echo signals of the plurality digital signal streams introduced during transmission of the plurality digital signal streams depending upon signal coupling of the plurality of digital signal streams.
摘要翻译： 公开了一种联合处理多个数字信号流的方法和装置。 该方法包括将多个数字信号流从原始域转换为较低复杂度的处理域。 经变换的多个数字信号流被联合处理，其中联合处理包括通过处理矩阵将多个经变换的数字信号流的采样相乘。 联合处理的信号流被反向变换回原始域。 根据多个数字信号流的信号耦合，自适应地选择处理矩阵的对角元件以消除在多个数字信号流的传输期间引入的多个数字信号流的传输回波信号。
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5.发明授权公开(公告)号：US06963619B1
公开(公告)日：2005-11-08
申请号：US09621119
申请日：2000-07-21
申请人： David J. Gesbert , Peroor K. Sebastian , Vinko Erceg , Victor Shtrom , Sanjay Kasturia , Arogyaswami J. Paulraj
发明人： David J. Gesbert , Peroor K. Sebastian , Vinko Erceg , Victor Shtrom , Sanjay Kasturia , Arogyaswami J. Paulraj
CPC分类号： H04B7/10
摘要： The present invention includes a wireless communication system. The wireless communication system includes a plurality of transceiver antennae. Each transceiver is spatially separate from at least one other transceiver antenna. Each transceiver antenna includes a transceiver antenna polarization. At least one transceiver antenna has a polarization that is different than at least one other transceiver antenna. Each transceiver antenna transmits a corresponding data stream. The wireless communication system further includes a plurality of receiver antennae. The receiver antennae receive at least one data stream. The transceiver antenna polarization of each transceiver antenna is pre-set to optimize separability of the received data streams. A transmission channel between the transceiver antennae and the receiver antennae can be estimated with a channel matrix. The pre-set transceiver antenna polarization of each transceiver antenna can be determined by minimizing a singular value spread of the channel matrix. A pre-set receiver antenna polarization of each receiver antenna can also be determined by minimizing a singular value spread of the channel matrix.
摘要翻译： 本发明包括无线通信系统。 无线通信系统包括多个收发器天线。 每个收发器在空间上与至少一个其他收发器天线分离。 每个收发天线包括收发天线极化。 至少一个收发天线具有与至少一个其它收发器天线不同的极化。 每个收发天线发送相应的数据流。 无线通信系统还包括多个接收机天线。 接收器天线接收至少一个数据流。 每个收发天线的收发天线极化被预先设定，以优化接收数据流的可分离性。 可以用信道矩阵来估计收发天线和接收机天线之间的传输信道。 可以通过最小化信道矩阵的奇异值扩展来确定每个收发天线的预设收发天线极化。 也可以通过最小化信道矩阵的奇异值扩展来确定每个接收机天线的预设接收机天线极化。
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公开(公告)号：US20050094583A1
公开(公告)日：2005-05-05
申请号：US10699761
申请日：2003-11-03
申请人： Sandeep Gupta , Sanjay Kasturia , Jose Tellado
发明人： Sandeep Gupta , Sanjay Kasturia , Jose Tellado
CPC分类号： H04L25/14 , H04L5/1423
摘要： The invention includes a full duplex transceiver for transmitting and receiving communication signals. The transceiver includes 1 to N sample and hold circuits. Each sample and hold circuit receives a first signal that includes a far-end signal, and in some cases an echo signal, and in some cases alternatively or additionally cross-talk signals. The transceiver additionally includes a plurality of subtraction circuits. Each subtraction circuit receives an output of at least one of the sample and hold circuits. Each subtraction circuit subtracts at least a fraction of a replica signal from at least a fraction of the output of the at least one of the sample and hold circuits. The subtraction circuits generate an output that represent the far-end signal with substantially reduced echo and/or cross-talk interference, and is available for additional receiver processing.
摘要翻译： 本发明包括用于发送和接收通信信号的全双工收发器。 收发器包括1到N个采样和保持电路。 每个采样和保持电路接收包括远端信号的第一信号，并且在某些情况下接收回波信号，并且在一些情况下接收或附加的串扰信号。 收发器还包括多个减法电路。 每个减法电路接收至少一个采样和保持电路的输出。 每个减法电路从至少一个采样和保持电路的输出的至少一部分中减去副本信号的至少一部分。 减法电路产生表示具有显着减少的回声和/或串扰干扰的远端信号的输出，并且可用于额外的接收机处理。
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公开(公告)号：US5914946A
公开(公告)日：1999-06-22
申请号：US745392
申请日：1996-11-08
申请人： Dan Avidor , Sanjay Kasturia , Theodore Sizer, II , Reinaldo A. Valenzuela , Gregory Alan Wright
发明人： Dan Avidor , Sanjay Kasturia , Theodore Sizer, II , Reinaldo A. Valenzuela , Gregory Alan Wright
摘要： A time-division-multiplexed fixed wireless loop system and methods therefor are disclosed. The system comprises a plurality of cells each having a base station and a plurality of terminals. The base station includes a steerable and adjustable multibeam antenna for communicating with each of the terminals, which have fixed antennas. A cell controller associated with each base station allocates communication time slots so as to minimize mutual interference between base station/terminal links sharing the same time slot. Slot assignment is based on regional, periodically updated interference measurements that are stored in data bases.
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公开(公告)号：US5394116A
公开(公告)日：1995-02-28
申请号：US175073
申请日：1993-12-29
申请人： Sanjay Kasturia
发明人： Sanjay Kasturia
CPC分类号： H03B27/00 , H03L7/081 , H03L7/0996 , H03L7/183
摘要： A ring oscillator has a plurality of oscillator outputs, each of which carries an oscillating signal of a given frequency and thus repetition period but with a phase shift of a predetermined fraction of the repetition period from any one of the oscillator outputs to a next oscillator output in a predetermined repetitive sequence. The inputs of a selector are each connected to a respective one of the oscillator outputs. The selector includes a number of individually actuatable selector switches that are so actuated as to establish a connection between the selector output and only any selected one of the selector inputs at any time. The actuation is accomplished in a first mode, in which the selector switches maintain the connection, or in a second mode in which the selector switches intermittently index the connection in the predetermined repetitive sequence among the selector inputs.
摘要翻译： 环形振荡器具有多个振荡器输出，每个振荡器输出具有给定频率和因此重复周期的振荡信号，但是具有从任何一个振荡器输出到下一个振荡器输出的重复周期的预定分数的相移 以预定的重复序列。 选择器的输入端各自连接到相应的振荡器输出端。 选择器包括多个单独致动的选择器开关，其被致动以在任何时间在选择器输出和仅选择的输入之一建立连接。 在第一模式中完成启动，其中选择器开关保持连接，或者在第二模式中，选择器开关以选择器输入之间的预定重复序列间断地对连接进行索引。
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9.发明授权System and method for synchronizing data transmission from multiple wireless base transceiver stations to a subscriber unit 有权用于使从多个无线基站收发台到用户单元的数据传输同步的系统和方法公开(公告)号：US07397804B2
公开(公告)日：2008-07-08
申请号：US10989909
申请日：2004-11-16
IPC分类号： H04L12/28
CPC分类号： H04W56/006 , H04B7/022
摘要： The invention includes an apparatus and a method for transmitting sub-protocol data units from a plurality of base transceiver stations to a subscriber unit. The method includes estimating time delays required for transferring the sub-protocol data units between a scheduler unit and each of the base transceiver stations. The method further includes the scheduler unit generating a schedule of time slots and frequency blocks in which the sub-protocol data units are to be transmitted from the base transceiver stations to the subscriber unit. The time delays are used to generate the schedule. The time delays can be used to generate a look ahead schedule that compensates for the timing delays of the sub-protocol data units from the scheduler unit to the base transceiver stations. The sub-protocol data units are wirelessly transmitted from the base transceiver stations to the subscriber unit according to the schedule. The time delays can be estimated by time-stamping sub-protocol data units before sub-protocol data units are transferred from the scheduler unit to the base transceiver stations, and estimating the time delays by comparing the times the sub-protocol data units are actually received by the base transceiver stations with the time-stamping.
摘要翻译： 本发明包括一种用于将子协议数据单元从多个基站收发台发送到用户单元的装置和方法。 该方法包括估计在调度器单元和每个基站收发台之间传送子协议数据单元所需的时间延迟。 该方法还包括调度器单元，其生成将从基站收发台向用户单元发送子协议数据单元的时隙和频率块的调度。 时间延迟用于生成时间表。 可以使用时间延迟来产生向前调度表，该调度补偿子协议数据单元从调度器单元到基站收发台的定时延迟。 子协议数据单元根据时间表从基站收发台无线发送到用户单元。 时间延迟可以在子协议数据单元从调度器单元传送到基站收发台之前通过时间戳子协议数据单元来估计，并且通过比较子协议数据单元实际上的时间来估计时间延迟 由基地收发台接收时间戳。
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公开(公告)号：US07333448B2
公开(公告)日：2008-02-19
申请号：US10699761
申请日：2003-11-03
IPC分类号： H04B3/20
CPC分类号： H04L25/14 , H04L5/1423
摘要： The invention includes a full duplex transceiver for transmitting and receiving communication signals. The transceiver includes 1 to N sample and hold circuits. Each sample and hold circuit receives a first signal that includes a far-end signal, and in some cases an echo signal, and in some cases alternatively or additionally cross-talk signals. The transceiver additionally includes a plurality of subtraction circuits. Each subtraction circuit receives an output of at least one of the sample and hold circuits. Each subtraction circuit subtracts at least a fraction of a replica signal from at least a fraction of the output of the at least one of the sample and hold circuits. The subtraction circuits generate an output that represent the far-end signal with substantially reduced echo and/or cross-talk interference, and is available for additional receiver processing.
摘要翻译： 本发明包括用于发送和接收通信信号的全双工收发器。 收发器包括1到N个采样和保持电路。 每个采样和保持电路接收包括远端信号的第一信号，并且在某些情况下接收回波信号，并且在一些情况下接收或附加的串扰信号。 收发器还包括多个减法电路。 每个减法电路接收至少一个采样和保持电路的输出。 每个减法电路从至少一个采样和保持电路的输出的至少一部分中减去副本信号的至少一部分。 减法电路产生表示具有显着减少的回声和/或串扰干扰的远端信号的输出，并且可用于额外的接收机处理。
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