公开(公告)号：US07664193B2

公开(公告)日：2010-02-16

申请号：US11297244

申请日：2005-12-07

申请人： Ahmad Jalali ,  Jay R. Walton ,  Mark Wallace

发明人： Ahmad Jalali ,  Jay R. Walton ,  Mark Wallace

IPC分类号： H04B7/02

CPC分类号： H04L5/023

摘要： For certain embodiments of the present disclosure, a method and apparatus for generating pilots in a wireless multiple-input multiple output (MIMO) communication system is provided. The method comprises obtaining at least one pilot symbol for each antenna of a plurality of antennas, obtaining an orthogonal sequence for each antenna in the plurality of antennas, and covering the at least one pilot symbol for each antenna with the orthogonal sequence to obtain a sequence of covered pilot symbols for each antenna to obtain at least one covered pilot symbols for each of the plurality of antennas.

摘要翻译： 对于本公开的某些实施例，提供了一种用于在无线多输入多输出（MIMO）通信系统中生成导频的方法和装置。 该方法包括获得多个天线中的每个天线的至少一个导频符号，为多个天线中的每个天线获得正交序列，并用正交序列覆盖每个天线的至少一个导频符号，以获得序列 的每个天线的覆盖的导频符号，以获得用于多个天线中的每一个的至少一个被覆盖的导频符号。

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。

公开(公告)号：US20070083803A1

公开(公告)日：2007-04-12

申请号：US11249293

申请日：2005-10-12

申请人： Pei Chen ,  Ahmad Jalali

发明人： Pei Chen ,  Ahmad Jalali

IPC分类号： H03M13/00

CPC分类号： H03M13/2789 ,  H03M13/271 ,  H03M13/276 ,  H03M13/2771 ,  H03M13/2957

摘要： At least one aspect of the invention provides a turbo encoder having parallel first and second constituent encoders and an interleaver coupled as an input to the second constituent encoder to provide a permutated version of the binary data input to the first constituent encoder to achieve a low frame error rate. The interleaver is configured to parse the binary data input into an input block, determine a permutation vector, and rearrange the order of the binary data in the input block according to a set of predetermined permutation equations. The rearranged binary data in the information block is then passed to the second constituent encoder to improve the distance spectrum of the transmitted redundant data.

摘要翻译： 本发明的至少一个方面提供了一种具有并行的第一和第二组成编码器的turbo编码器和作为第二组成编码器的输入的交织器，以提供输入到第一组成编码器的二进制数据的置换版本以实现低帧 错误率。 交织器被配置为将输入的二进制数据解析成输入块，确定置换向量，并且根据一组预定的置换方程重新排列输入块中的二进制数据的顺序。 然后将信息块中的重新排列的二进制数据传递给第二组成编码器，以改进发送的冗余数据的距离谱。

公开(公告)号：US07127654B2

公开(公告)日：2006-10-24

申请号：US10712582

申请日：2003-11-12

申请人： Ahmad Jalali ,  Eduardo A. S. Esteves ,  Nagabhushana T. Sindhushayana ,  Peter J. Black ,  Rashid A. Attar

发明人： Ahmad Jalali ,  Eduardo A. S. Esteves ,  Nagabhushana T. Sindhushayana ,  Peter J. Black ,  Rashid A. Attar

IPC分类号： G08C25/02 ,  H04J3/24 ,  H04L7/00

CPC分类号： H04L1/1887 ,  H04L1/1692 ,  H04L1/1809 ,  H04L1/1848 ,  H04L1/1877 ,  H04L1/188

摘要： A method and an apparatus for quick retransmission of signals in a communication system are disclosed. A transmitting terminal, e.g., a base station, transmits signals in a form of packets to a receiving terminal, e.g., a subscriber station. The receiving terminal determines if the packet was intended for the receiving terminal, and if so, the receiving terminal demodulates the packet. The receiving terminal then computes a quality metric of the packet, and compares the computed quality metric with a quality metric contained in the packet. If the quality metrics match, the packet is declared correctly received, and is forwarded for further processing. If the quality metrics fail to match, the receiving terminal sends a request for retransmission of the packet. The transmitting terminal determines which packet needs to be retransmitted based on the request for retransmission. The transmitting terminal then schedules the packet for retransmission.

公开(公告)号：US20060109926A1

公开(公告)日：2006-05-25

申请号：US11328807

申请日：2006-01-09

申请人： Ahmad Jalali ,  John Smee ,  Mark Wallace

发明人： Ahmad Jalali ,  John Smee ,  Mark Wallace

IPC分类号： H04K1/10 ,  H04B7/212 ,  H04L1/02

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.

公开(公告)号：US07027523B2

公开(公告)日：2006-04-11

申请号：US09887225

申请日：2001-06-22

申请人： Ahmad Jalali ,  John E. Smee ,  Mark Wallace

发明人： Ahmad Jalali ,  John E. Smee ,  Mark Wallace

IPC分类号： H04L25/03

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.