公开(公告)号：US20090202014A1

公开(公告)日：2009-08-13

申请号：US12186368

申请日：2008-08-05

Applicant: Syed Aon Mujtaba ,  Xiaowen Wang

Inventor： Syed Aon Mujtaba ,  Xiaowen Wang

IPC: H04B7/02

CPC classification number: H04B7/0413 ,  H04B7/0417 ,  H04B7/0669 ,  H04B7/068 ,  H04B7/0888 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/0054 ,  H04L1/0625

Abstract: A method of the multiple input multiple output feedback is disclosed. In accordance with an embodiment of the invention, the multiple input multiple output feedback method includes a receiver receiving a reference signal from a base station and calculating a signal to interference and noise ratio from the received reference signal. The method further includes determining a modulation and coding scheme based on the signal to interference and noise ratio and a receiver type.

Abstract translation: 公开了一种多输入多输出反馈的方法。 根据本发明的实施例，多输入多输出反馈方法包括接收来自基站的参考信号的接收机，并根据接收到的参考信号计算信噪比。 该方法还包括基于信号与干扰和噪声比确定调制和编码方案以及接收机类型。

公开(公告)号：US07366250B2

公开(公告)日：2008-04-29

申请号：US11122147

申请日：2005-05-04

Applicant: Syed Aon Mujtaba ,  Xiaowen Wang

Inventor： Syed Aon Mujtaba ,  Xiaowen Wang

IPC: H04B7/02

CPC classification number: H04L25/0206 ,  H04B7/0613 ,  H04B7/12 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2628

Abstract: Methods and apparatus are provided for improved efficiency in an extended multiple antenna communication system. A multiplier is employed on the number of points in the FFT that is greater than the multiplier on the frequency (bandwidth) of the legacy 802.11 a/g system. In one exemplary implementation, a 256 point FFT is employed in 40 MHz (with a 4N multiplier on the number of possible tones and a 2N multiplier on the frequency). While the efficiency for the OFDM symbol is improved, additional overhead is required in the preamble training (the length of the preamble is proportional to the number of tones in the FFT). Thus, a number of preamble constructs are provided that couple the improved efficiency with shorter preambles. In addition, an improved tone design provides additional efficiency gains.

Abstract translation: 提供了用于在扩展的多天线通信系统中提高效率的方法和装置。 FFT中的点数大于传统802.11 a / g系统的频率（带宽）乘数的乘数。 在一个示例性实现中，在40MHz中采用256点FFT（对于可能音调的数量具有4N乘法器，并且在频率上具有2N乘法器）。 虽然改进了OFDM符号的效率，但在前同步码训练中需要额外的开销（前导码的长度与FFT中的音调数成正比）。 因此，提供了许多前导码结构，其将改进的效率与较短的前导码相结合。 此外，改进的音调设计提供了额外的效率增益。

公开(公告)号：US20060141974A1

公开(公告)日：2006-06-29

申请号：US11022317

申请日：2004-12-23

Applicant: Edward Campbell ,  Syed Aon Mujtaba

Inventor： Edward Campbell ,  Syed Aon Mujtaba

IPC: H04B1/26 ,  H04B15/00

CPC classification number: H04B1/30 ,  H04B1/1027 ,  H04B2001/1045

Abstract: A low IF mixer and method for down-converting a signal at a desired frequency are disclosed with improved selectivity performance. The energy of sidebands on each side of the desired frequency is evaluated; and a local oscillator frequency is selected based on the evaluation of the energy. Generally, the local oscillator frequency associated with the sideband having a lower energy is selected. The desired frequency may have a frequency of RF and the sidebands have a frequency of the desired frequency plus or minus an offset frequency (RF+IF or RF−IF). The signal at the desired frequency may be multiplied by the selected local oscillator frequency to down-convert the signal.

Abstract translation: 具有改进的选择性性能的低IF混频器和用于以期望频率下变频的方法被公开。 对期望频率的每一侧的边带的能量进行评估; 并且基于能量的评估来选择本地振荡器频率。 通常，选择与具有较低能量的边带相关联的本地振荡器频率。 期望的频率可以具有RF的频率，并且边带具有所需频率的频率加或减偏移频率（RF + IF或RF-IF）。 以所需频率的信号可以乘以所选择的本地振荡器频率以对信号进行下变频。

公开(公告)号：US20150085688A1

公开(公告)日：2015-03-26

申请号：US14496969

申请日：2014-09-25

Applicant: Navid DAMJI ,  Tarik Tabet ,  Johnson Sebeni ,  Syed Aon Mujtaba

Inventor： Navid DAMJI ,  Tarik Tabet ,  Johnson Sebeni ,  Syed Aon Mujtaba

IPC: H04L25/02 ,  H04W52/02 ,  H04L5/00

CPC classification number: H04L25/0228 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/024 ,  H04W52/0229 ,  H04W52/0245 ,  Y02D70/1262 ,  Y02D70/23

Abstract: A station performing a method to toggle a channel estimation setting between a full channel estimation that includes estimating the channel based upon a predetermined number of received reference symbols prior to a current subframe and a partial channel estimation that includes estimating the channel based upon a subset of the predetermined number of received reference symbols. The method includes changing the setting from full to partial when a predetermined number of consecutive subframes immediately prior to the current subframe had no downlink allocated and a reliability value indicates that control signals are capable of being reliably received. The method also includes changing the setting from partial to full when the current subframe had a downlink allocated thereto or the reliability value indicates that the control signals are incapable of being received to estimate the channel using the partial channel estimation.

Abstract translation: 一种执行在全信道估计之间切换信道估计设置的方法，该全信道估计包括基于在当前子帧之前的预定数目的接收参考符号来估计信道，以及包括基于子信道估计的子信道估计信道 接收到的参考符号的预定数量。 该方法包括当紧接当前子帧之前的预定数量的连续子帧没有下行链路被分配并且可靠性值指示控制信号能够被可靠地接收时，将设置从全部改变为部分。 该方法还包括当当前子帧具有下行链路分配时将设置从部分改变为全部，或者可靠性值指示控制信号不能被接收以使用部分信道估计来估计信道。

公开(公告)号：US20120182899A1

公开(公告)日：2012-07-19

申请号：US13428784

申请日：2012-03-23

Applicant: Syed Aon Mujtaba ,  Xiaowen Wang

Inventor： Syed Aon Mujtaba ,  Xiaowen Wang

IPC: H04B17/00 ,  H04W88/10 ,  H04W24/00

CPC classification number: H04B7/0417 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/068 ,  H04B7/0689 ,  H04L1/0016

Abstract: A Channel Quality Indicator table for wireless multiple input multiple output (MIMO) networks is disclosed. In one embodiment, a method of generating a table for channel quality indicator (CQI) for an open loop MIMO transmission includes calculating performance of a link between a transmitter and a user end unit for each MIMO transmission mode over a range of average signal-to-noise ratio, and selecting the MIMO transmission mode that maximizes performance for each subset of the range of average signal-to-noise ratio. The method further includes storing the selected MIMO transmission mode and the corresponding subset of the range of average signal-to-noise ratio in a CQI table, the CQI table being stored in an user end unit and a base transceiver station of the open loop MIMO network.

Abstract translation: 公开了一种用于无线多输入多输出（MIMO）网络的信道质量指标表。 在一个实施例中，生成用于开环MIMO传输的信道质量指示符（CQI）的表的方法包括：在平均信号到平均信号的范围内，针对每个MIMO传输模式来计算发射机和用户端单元之间的链路的性能 并且选择使平均信噪比范围的每个子集的性能最大化的MIMO传输模式。 该方法还包括将所选择的MIMO传输模式和平均信噪比范围的对应子集存储在CQI表中，该CQI表被存储在开环MIMO的用户端单元和基站中 网络。

公开(公告)号：US06539067B1

公开(公告)日：2003-03-25

申请号：US09300495

申请日：1999-04-28

Applicant: Carlo Luschi ,  Syed Aon Mujtaba ,  Magnus Sandell ,  Paul Edward Strauch ,  Ran-Hong Yan ,  Stephan ten Brink

Inventor： Carlo Luschi ,  Syed Aon Mujtaba ,  Magnus Sandell ,  Paul Edward Strauch ,  Ran-Hong Yan ,  Stephan ten Brink

IPC: H04L2706

CPC classification number: H04L25/0202

Abstract: A method of estimating channel impulse response in a signal transmitted over a channel in a communication system is described. The channel estimator obtains a priori knowledge about the transmitted signal, and then uses the transmitted signal and the a priori knowledge to choose an estimate of channel impulse response which minimizes the expected distance between the transmitted signal and a reconstructed signal. The expected distance that is minimized is a cost function, represented by E{∥r−Bh∥2r}. By using soft decision feedback, the invention minimizes erroneous decision feedback which can cause error propagation. The decisions are usually in the form of log likelihood ratios (LLR).

Abstract translation: 描述了在通信系统中通过信道发送的信号中估计信道脉冲响应的方法。 信道估计器获得关于发射信号的先验知识，然后使用发射信号和先验知识来选择信道脉冲响应的估计，其使发射信号和重构信号之间的预期距离最小化。 最小化的预期距离是由E {‖r-Bh‖2r}表示的成本函数。 通过使用软判决反馈，本发明使可能导致错误传播的错误判定反馈最小化。 决策通常是对数似然比（LLR）的形式。

公开(公告)号：US06456666B1

公开(公告)日：2002-09-24

申请号：US09363524

申请日：1999-07-29

Applicant: Thaddeus John Gabara ,  Syed Aon Mujtaba

Inventor： Thaddeus John Gabara ,  Syed Aon Mujtaba

IPC: H04L2700

CPC classification number: H04L25/4904 ,  H04L5/02 ,  H04L25/4906

Abstract: Two or more digital signals are encoded using two or more respective line codes. The line codes are chosen in conjunction with the data rates of the digital signals such that the encoded signals are substantially orthogonal to each other in the frequency domain. As such, the two or more encoded signals may be combined and transmitted via a single physical medium with little or no interference. A transmitter for encoding and transmitting the digital signals contains line coders for encoding the digital signals and a combiner for combining the encoded signals for transmission via a single physical medium.

Abstract translation: 使用两个或多个相应的行代码对两个或多个数字信号进行编码。 结合数字信号的数据速率选择线路代码，使得编码信号在频域中基本上彼此正交。 这样，两个或多个编码信号可以通过具有很少或没有干扰的单个物理介质进行组合和发送。 用于编码和发送数字信号的发射机包含用于对数字信号进行编码的编码器和用于组合经编码的信号以进行经由单个物理介质传输的组合器。

公开(公告)号：US06271772B1

公开(公告)日：2001-08-07

申请号：US09235049

申请日：1999-01-21

Applicant: Carlo Luschi ,  Syed Aon Mujtaba ,  Magnus Sandell ,  Paul Edward Strauch ,  Ran-Hong Yan ,  Stephan ten Brink

Inventor： Carlo Luschi ,  Syed Aon Mujtaba ,  Magnus Sandell ,  Paul Edward Strauch ,  Ran-Hong Yan ,  Stephan ten Brink

IPC: H03M734

CPC classification number: H03M13/2948 ,  H03M13/29

Abstract: Apparatus and method for iteratively decoding a signal are provided. The apparatus includes a central pool of resources for iteratively decoding signals. The central pool may run a plurality of iterative decoding processes, each process being allocated to a signal processing unit upon request and depending upon resource availability.

Abstract translation: 提供了用于迭代地解码信号的装置和方法。 该装置包括用于迭代地解码信号的中央资源库。 中央池可以运行多个迭代解码过程，每个进程根据请求分配给信号处理单元，并且取决于资源可用性。

公开(公告)号：US20150092711A1

公开(公告)日：2015-04-02

申请号：US14500481

申请日：2014-09-29

Applicant: Tarik TABET ,  Vinay MAJJIGI ,  Syed Aon MUJTABA

Inventor： Tarik TABET ,  Vinay MAJJIGI ,  Syed Aon MUJTABA

IPC: H04W72/04 ,  H04L5/00 ,  H04L1/00

CPC classification number: H04L5/0053 ,  H04L1/0042 ,  H04L1/0045 ,  H04L1/0061 ,  H04L1/0072

Abstract: A method performed at a network component for indicating a number of grants in a transmission and a corresponding method performed at a station to limit a search for the grants to the number indicated in the transmission. In one embodiment, the transmission includes physical downlink control channel (PDCCH) information and modified cyclic redundancy check (CRC) information, the modified CRC information being generated from CRC information for the PDCCH information and a modifier representing a number of grants. The station determines the number of grants from the modified CRC information, performs a search for a first grant within the PDCCH information and terminates the search upon identifying the first grant, when the number of grants is the first number.

Abstract translation: 一种在网络组件处执行的用于指示传输中的许可数量的方法以及在站点执行的对应方法，以限制对所述传输中指示的号码的授权的搜索。 在一个实施例中，传输包括物理下行链路控制信道（PDCCH）信息和修改的循环冗余校验（CRC）信息，所述修改的CRC信息是从用于PDCCH信息的CRC信息和表示许可数量的修改符生成的。 该站根据修改后的CRC信息确定授权数量，执行在PDCCH信息中的第一授权的搜索，并且当授权数是第一个数时，在识别第一授权时终止搜索。

公开(公告)号：US08619907B2

公开(公告)日：2013-12-31

申请号：US11043025

申请日：2005-01-24

Applicant: Syed Aon Mujtaba ,  Xiaowen Wang

Inventor： Syed Aon Mujtaba ,  Xiaowen Wang

IPC: H04L27/00

CPC classification number: H04B7/0667 ,  H04B7/0684

Abstract: Methods and apparatus are provided for communicating data in a multiple antenna communication system having N transmit antennas. According to one aspect of the invention, a header format includes a legacy preamble having at least one legacy long training field and an extended portion having at least N additional long training fields on each of the N transmit antennas. The N additional long training fields may be tone interleaved across the N transmit antennas and are used for MIMO channel estimation. The extended portion may include a short training field for power estimation. The short training field may be tone interleaved across the N transmit antennas and have an extended duration to support beam steering.

Abstract translation: 提供了用于在具有N个发射天线的多天线通信系统中传送数据的方法和装置。 根据本发明的一个方面，报头格式包括具有至少一个传统长训练场的传统前导码和在N个发射天线中的每一个上具有至少N个附加的长训练场的扩展部分。 N个附加的长训练场可以在N个发射天线之间进行音调交织，并用于MIMO信道估计。 扩展部分可以包括用于功率估计的短训练场。 短训练场可以在N个发射天线之间进行音调交织，并具有延长的持续时间以支持波束转向。