公开(公告)号：US08600292B2

公开(公告)日：2013-12-03

申请号：US11555859

申请日：2006-11-02

申请人： Ahmad Jalali

发明人： Ahmad Jalali

IPC分类号： H04H20/74

CPC分类号： H04B7/2041 ,  H04B7/0408

摘要： A satellite communication system designed to communicate with wireless communication devices (WCDs) by use of a mosaic pattern of signal beams uses multiple beams to augment the communication with individual WCDs. In addition to communication with a WCD through a primary beam for that WCD, adjacent beams are used, but with signals utilizing circuit parameters assigned to the primary beam. The signals from a given WCD are relayed in a backhaul, either as an aggregate signal processed by the satellite, or as backhaul communication signals to be combined or separated on the ground.

摘要翻译： 设计为通过使用信号束的马赛克图案与无线通信设备（WCD）通信的卫星通信系统使用多个波束来增强与各个WCD的通信。 除了通过用于该WCD的主波束与WCD的通信之外，还使用相邻的波束，但是使用分配给主波束的电路参数的信号。 来自给定WCD的信号在作为由卫星处理的聚合信号的回程中进行中继，或作为在地面上组合或分离的回程通信信号。

公开(公告)号：US08559895B2

公开(公告)日：2013-10-15

申请号：US12567181

申请日：2009-09-25

申请人： Ivan Jesus Fernandez-Corbaton ,  Ahmad Jalali ,  Ernest T. Ozaki ,  Harris Smith Simon ,  Sherman A. Gregory

发明人： Ivan Jesus Fernandez-Corbaton ,  Ahmad Jalali ,  Ernest T. Ozaki ,  Harris Smith Simon ,  Sherman A. Gregory

IPC分类号： H04B1/04

CPC分类号： H01Q25/00

摘要： At least one feature provides a way to perform point-to-multipoint transmissions using adaptive or directional antennas while reducing antenna pattern distortion. Generally, rather than transmitting the same waveform to two or more receivers, an information-bearing signal is transformed into different decorrelated waveforms and each decorrelated waveform is transmitted to a different receiver. In one implementation, an information-bearing signal is transformed into two decorrelated signals such that their crosscorrelation, or autocorrelation of the information-bearing signal, is zero or very small. Such decorrelation may be achieved by sending a first signal to a first receiver while sending a second signal, having a radio frequency spectrum that is the spectrally inverted version of the first signal, to a second receiver. In another implementation, a first signal is transmitted to a first receiver and is also transmitted to a second receiver with a time delay.

公开(公告)号：US08325591B2

公开(公告)日：2012-12-04

申请号：US10788729

申请日：2004-02-26

申请人： Sumantra Chakravarty ,  Ahmad Jalali ,  Leonard Norman Schiff

发明人： Sumantra Chakravarty ,  Ahmad Jalali ,  Leonard Norman Schiff

IPC分类号： H04J11/00

CPC分类号： H04B7/216 ,  H04J13/0048 ,  H04J13/18

摘要： An OCDMA transmission arrangement involves encoding both first and second nominally orthogonal polarization signals with a same long code, and transmitting the long-encoded first and second nominally orthogonal polarization signals from respective first and second transmission sources to at least one destination. A corresponding OCDMA demodulating arrangement demodulates the first and second nominally orthogonal polarization signals that were transmitted from respective first and second transmission sources after having been encoded with the same long code. The demodulation arrangement involves receiving the encoded first and second nominally orthogonal polarization signals, and applying the same long code to the received encoded first and second nominally orthogonal polarization signals.

摘要翻译： OCDMA传输装置包括用相同的长码对第一和第二标称正交极化信号进行编码，以及将长编码的第一和第二标称正交极化信号从相应的第一和第二传输源发送到至少一个目的地。 相应的OCDMA解调装置在已经用相同的长码编码之后解调从相应的第一和第二传输源发送的第一和第二名义上正交的极化信号。 解调装置包括接收经编码的第一和第二标称正交极化信号，并将相同的长码应用于接收的编码的第一和第二标称正交极化信号。

公开(公告)号：US20100254353A1

公开(公告)日：2010-10-07

申请号：US12817883

申请日：2010-06-17

申请人： Ahmad Jalali

发明人： Ahmad Jalali

IPC分类号： H04W4/00

CPC分类号： H04B7/18504

摘要： Aeronautical broadband communication is enhanced by providing an apparatus having a first antenna configured to communicate using a signal orientation corresponding to a first polarization, and a second antenna configured to communicate using a signal orientation corresponding to a second polarization, where the second polarization has at least one characteristic difference from the first polarization. Additional antennas may be used, where multiple antennas share one polarization, and multiple other antennas share a different polarization, and signals from like-polarized antennas are combined for beam-formation.

摘要翻译： 通过提供具有第一天线的装置来增强航空宽带通信，所述第一天线被配置为使用与第一极化相对应的信号方向进行通信，以及第二天线，被配置为使用与第二极化对应的信号取向进行通信，其中第二极化具有至少 与第一极化有一个特征差异。 可以使用附加的天线，其中多个天线共享一个极化，并且多个其它天线共享不同的极化，并且组合来自相同极化天线的信号用于波束形成。

公开(公告)号：US07729444B2

公开(公告)日：2010-06-01

申请号：US11963016

申请日：2007-12-21

申请人： Ahmad Jalali ,  John Edward Smee ,  Mark S. Wallace

发明人： Ahmad Jalali ,  John Edward Smee ,  Mark S. Wallace

IPC分类号： H04K1/02

CPC分类号： H04L1/0032 ,  H04B7/0434 ,  H04B7/0626 ,  H04L1/0003 ,  H04L1/0013 ,  H04L1/0026 ,  H04L1/0034 ,  H04L1/06 ,  H04L5/0023 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/03343 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426

摘要： Techniques to process data for transmission in a time division duplexed (TDD) communication system. In one aspect, the frequency response of a forward link is estimated at a base station based on reverse link transmissions (e.g., pilots) from a terminal. Prior to a data transmission on the forward link, the base station determines a reverse transfer function based on the pilots transmitted by the terminal, “calibrates” the reverse transfer function with a calibration function to derive an estimate of a forward transfer function, and preconditions modulation symbols based on weights derived from the forward transfer function. In another aspect, the terminal estimates the “quality” of the forward link and provides this information to the base station. The base station then uses the information to properly code and modulate data prior to transmission such that the transmitted data can be received by the terminal at the desired level of performance.

摘要翻译： 在时分双工（TDD）通信系统中处理用于传输的数据的技术。 在一个方面，基于来自终端的反向链路传输（例如，导频）在基站处估计前向链路的频率响应。 在前向链路上的数据传输之前，基站基于终端发送的导频来确定反向传递函数，使用校准功能“校准”反向传递函数，以导出前向传递函数的估计，以及前提条件 基于从前向传递函数导出的权重的调制符号。 在另一方面，终端估计前向链路的“质量”，并将该信息提供给基站。 然后，基站使用该信息在发送之前对数据进行适当的编码和调制，使得所发送的数据能够以期望的性能水平由终端接收。

公开(公告)号：US07487362B2

公开(公告)日：2009-02-03

申请号：US10785313

申请日：2004-02-23

申请人： Jack Steenstra ,  Alexander Gantman ,  John W. Noerenberg, II ,  Ahmad Jalali ,  Gregory G. Rose

发明人： Jack Steenstra ,  Alexander Gantman ,  John W. Noerenberg, II ,  Ahmad Jalali ,  Gregory G. Rose

IPC分类号： H04L9/00

CPC分类号： G06Q20/341 ,  G06Q20/346 ,  G06Q20/4014 ,  G06Q20/40975 ,  G07F7/1008 ,  G07F7/1016 ,  G07F7/1025 ,  H04L9/3228 ,  H04L9/3297

摘要： Apparatus and method are disclosed for digital authentication and verification. In one embodiment, authentication involves storing a cryptographic key and a look up table (LUT), generating an access code using the cryptographic key; generating multiple parallel BPSK symbols based upon the access code; converting the BPSK symbols into multiple tones encoded with the access code using the LUT; and outputting the multiple tones encoded with the access code for authentication. In another embodiment, verification involves receiving multiple tones encoded with an access code; generating multiple parallel BPSK symbols from the multiple tones; converting the BPSK symbols into an encoded interleaved bit stream of the access code; de-interleaving the encoded interleaved bit stream; and recovering the access code from the encoded de-interleaved bit stream.

摘要翻译： 公开了用于数字认证和验证的装置和方法。 在一个实施例中，认证涉及存储加密密钥和查找表（LUT），使用密码密钥生成访问代码; 基于所述访问码生成多个并行BPSK符号; 使用LUT将BPSK符号转换为用访问码编码的多个音调; 并输出用访问码编码的多个音调进行认证。 在另一个实施例中，验证涉及接收用访问码编码的多个音调; 从多个音调生成多个并行BPSK符号; 将所述BPSK符号转换为所述接入码的编码交织比特流; 对编码的交错比特流进行解交织; 以及从编码的解交织比特流中恢复接入码。

公开(公告)号：US20080186230A1

公开(公告)日：2008-08-07

申请号：US12098323

申请日：2008-04-04

申请人： Michael James Wengler ,  Ahmad Jalali

发明人： Michael James Wengler ,  Ahmad Jalali

IPC分类号： G01S3/16 ,  G01S13/90

CPC分类号： G01S19/21 ,  G01S5/0215 ,  G01S19/36 ,  G01S2013/466 ,  H04B7/0854

摘要： A method for detecting a plurality of navigation beacon signals by using either two antennas or a synthetic aperture antenna for receiving a plurality of distinct measurements, and combining the plurality of distinct measurements using a plurality of antenna weight components to form an interference cancellation beam. In one embodiment, the plurality of antenna weight components is determined by eigenvalue processing. In another embodiment, the plurality of antenna weight components is determined by simplified processing. In another aspect, a single antenna is used for receiving an originally received measurement. A copy of the originally received measurement is made and processed to achieve the proper time delay to emulate spatial diversity. The originally received measurement and the processed copy are combined to form an interference cancellation beam.

摘要翻译： 一种用于通过使用两个天线或合成孔径天线来接收多个不同测量来检测多个导航信标信号的方法，以及使用多个天线权重分量组合所述多个不同测量以形成干扰消除波束。 在一个实施例中，多个天线权重分量由特征值处理确定。 在另一个实施例中，通过简化的处理来确定多个天线权重分量。 在另一方面，单个天线用于接收原始接收的测量。 进行原始接收的测量的副本并进行处理以实现适当的时间延迟来模拟空间分集。 原始接收的测量和处理的拷贝被组合以形成干扰消除波束。

公开(公告)号：US20080115007A1

公开(公告)日：2008-05-15

申请号：US11937746

申请日：2007-11-09

申请人： Ahmad Jalali

发明人： Ahmad Jalali

IPC分类号： G06F11/00

CPC分类号： H04L5/0007 ,  H04B7/18508 ,  H04B7/18536 ,  H04B7/2628 ,  H04B2201/709709 ,  H04H40/90 ,  H04L1/0045 ,  H04L1/007 ,  H04L1/0086 ,  H04L1/08 ,  H04L65/601 ,  H04L2001/0097 ,  H04N21/2343 ,  H04N21/2383 ,  H04N21/2662 ,  H04N21/6143 ,  H04N21/631

摘要： An original data stream is encoded into a high priority data stream and a low priority data stream. The high priority data stream is encoded so as to permit decoding of the high priority data steam independently of the low priority data stream. The high priority data stream is transmitted twice, while the low priority data claim 25. is transmitted in two portions, but only once. If both the first portion and the second portion of the low priority data stream are received, and at least one complete transmission of the high priority data stream is received, then the two data streams are combined to produce a signal output of high quality. However, if any portions of the low priority data stream is lost then the low priority data stream is not used, and only the high priority data stream is used to produce output. Overall throughput is greater than would be achieved if the original data stream were transmitted with complete redundancy.

摘要翻译： 原始数据流被编码为高优先级数据流和低优先级数据流。 对高优先级数据流进行编码，以便能够独立于低优先级数据流解码高优先级数据流。 高优先级数据流被发送两次，而低优先权数据要求25。 传输两部分，但只有一次。 如果接收到低优先级数据流的第一部分和第二部分，并且接收到高优先级数据流的至少一个完整传输，则两个数据流被组合以产生高质量的信号输出。 然而，如果低优先级数据流的任何部分丢失，则不使用低优先级数据流，并且仅使用高优先级数据流来产生输出。 如果原始数据流以完全冗余传输，则总吞吐量大于实现的吞吐量。

公开(公告)号：US20080025312A1

公开(公告)日：2008-01-31

申请号：US11829871

申请日：2007-07-27

申请人： Kalyan Kuppuswamy ,  June Namgoong ,  Srikant Jayaraman ,  Ahmad Jalali ,  Rohit Kapoor

发明人： Kalyan Kuppuswamy ,  June Namgoong ,  Srikant Jayaraman ,  Ahmad Jalali ,  Rohit Kapoor

IPC分类号： H04L12/56

CPC分类号： H04W28/06 ,  H04L69/04 ,  H04L69/22 ,  H04W84/06

摘要： A communication system is disclosed in which a mobile terminal having limited power is able to communicate with a land-based network via a low-rate satellite communication link. To achieve VoIP communications via a low-rate link, link-layer assisted zero-header header compression techniques are employed to reduce VoIP packet overheads. Additionally, overheads introduced by link layer protocol layers are eliminated or reduced. A transmitting device strips RTP/UDP/IP header information from a stream of VoIP packets. The transmitting device then sends an initial context message providing the RTP/UDP/IP header information. The stripped zero-header VoIP packets are then transmitted via a satellite relay. A receiving device uses the initial context information to reconstruct the headers for the zero-header VoIP packets.

摘要翻译： 公开了一种通信系统，其中具有有限功率的移动终端能够经由低速率卫星通信链路与陆基网络进行通信。 为了通过低速率链路实现VoIP通信，采用链路层辅助的零标题报头压缩技术来减少VoIP分组开销。 此外，消除或减少了由链路层协议层引入的开销。 发送设备从VoIP数据包流中剥离RTP / UDP / IP头信息。 然后，发送设备发送提供RTP / UDP / IP报头信息的初始上​​下文消息。 然后通过卫星中继传输剥离的零标题VoIP数据包。 接收设备使用初始上下文信息来重构零标题VoIP分组的报头。

公开(公告)号：US20070178927A1

公开(公告)日：2007-08-02

申请号：US11441651

申请日：2006-05-25

申请人： Ivan Fernandez-Corbaton ,  Ahmad Jalali ,  Jordi Pinos Pont

发明人： Ivan Fernandez-Corbaton ,  Ahmad Jalali ,  Jordi Pinos Pont

IPC分类号： H04B7/00 ,  H04Q7/20

CPC分类号： H04W52/343 ,  H04W52/367

摘要： A novel MAC algorithm is disclosed having various features for a modern CDMA interference-shared reverse link, including (a) link quality assurance, (b) individual congestion control, (c) variable data rate transition policy, and/or (d) reverse link partitioning. Link quality assurance is provided by monitoring transmission feedback information (ACK/NACK) to indirectly determine the quality of a communication link. Wireless devices are individually targeted to perform congestion control of the reverse link. Variable data transmission rates and discontinuous transmissions are achieved by individual wireless devices that autonomously adjust their transmission rate and transmit power. The reverse link can also be partitioned among the different wireless devices by individually controlling the transmit power of the wireless devices operating on the reverse link.

摘要翻译： 公开了一种新颖的MAC算法，其具有用于现代CDMA干扰共享反向链路的各种特征，包括（a）链路质量保证，（b）个体拥塞控制，（c）可变数据速率转换策略和/或（d）反向 链接分区。 通过监视传输反馈信息（ACK / NACK）来间接地确定通信链路的质量来提供链路质量保证。 无线设备被单独定向以执行反向链路的拥塞控制。 可变数据传输速率和不连续传输通过自主调整其传输速率和传输功率的各个无线设备实现。 也可以通过单独控制在反向链路上操作的无线设备的发射功率，在不同的无线设备之间对反向链路进行分区。