公开(公告)号：US07895495B2

公开(公告)日：2011-02-22

申请号：US12422696

申请日：2009-04-13

申请人： Jan Boer ,  Wilhelmus Diepstraten ,  Joachim S. Hammerschmidt ,  Syed Aon Mujtaba

发明人： Jan Boer ,  Wilhelmus Diepstraten ,  Joachim S. Hammerschmidt ,  Syed Aon Mujtaba

IPC分类号： G08C25/02 ,  H04L1/18 ,  H03M13/00

CPC分类号： H04L1/1829

摘要： A station for a communications network. In one embodiment, the station includes a decoder, a check processor, and a transmitter. The decoder is adapted to decode a received encoded data unit. The check processor is adapted to determine whether the encoded data unit has been correctly received. The transmitter is adapted to initiate, prior to the check processor completing the determination whether the encoded data unit has been correctly received, the transmission of an acknowledgment message comprising a frame having a plurality of different fields of data. The transmitter is adapted to modify the transmission of the acknowledgment message if the check processor determines that the data unit has not been correctly received.

摘要翻译： 通信网站。 在一个实施例中，站包括解码器，检查处理器和发射器。 解码器适于对接收到的编码数据单元进行解码。 检查处理器适于确定编码数据单元是否已被正确接收。 所述发射机适于在所述检查处理器完成所述编码数据单元是否已被正确接收的确定之前发起包括具有多个不同数据场的帧的确认消息的发送。 如果检查处理器确定数据单元未被正确接收，则发射机适于修改确认消息的传输。

公开(公告)号：US20090202014A1

公开(公告)日：2009-08-13

申请号：US12186368

申请日：2008-08-05

申请人： Syed Aon Mujtaba ,  Xiaowen Wang

发明人： Syed Aon Mujtaba ,  Xiaowen Wang

IPC分类号： H04B7/02

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

摘要： 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.

摘要翻译： 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

申请人： Syed Aon Mujtaba ,  Xiaowen Wang

发明人： Syed Aon Mujtaba ,  Xiaowen Wang

IPC分类号： H04B7/02

CPC分类号： H04L25/0206 ,  H04B7/0613 ,  H04B7/12 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2628

摘要： 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.

摘要翻译： 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

申请人： Edward Campbell ,  Syed Aon Mujtaba

发明人： Edward Campbell ,  Syed Aon Mujtaba

IPC分类号： H04B1/26 ,  H04B15/00

CPC分类号： H04B1/30 ,  H04B1/1027 ,  H04B2001/1045

摘要： 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.

摘要翻译： 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

申请人： Navid DAMJI ,  Tarik Tabet ,  Johnson Sebeni ,  Syed Aon Mujtaba

发明人： Navid DAMJI ,  Tarik Tabet ,  Johnson Sebeni ,  Syed Aon Mujtaba

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

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

摘要： 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.

摘要翻译： 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

申请人： Syed Aon Mujtaba ,  Xiaowen Wang

发明人： Syed Aon Mujtaba ,  Xiaowen Wang

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

CPC分类号： H04B7/0417 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/068 ,  H04B7/0689 ,  H04L1/0016

摘要： 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.

摘要翻译： 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：US06456666B1

公开(公告)日：2002-09-24

申请号：US09363524

申请日：1999-07-29

申请人： Thaddeus John Gabara ,  Syed Aon Mujtaba

发明人： Thaddeus John Gabara ,  Syed Aon Mujtaba

IPC分类号： H04L2700

CPC分类号： H04L25/4904 ,  H04L5/02 ,  H04L25/4906

摘要： 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.

摘要翻译： 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：US08964522B2

公开(公告)日：2015-02-24

申请号：US11572450

申请日：2005-09-09

申请人： Syed Aon Mujtaba ,  Xiaowen Wang

发明人： Syed Aon Mujtaba ,  Xiaowen Wang

IPC分类号： H04W48/08 ,  H04B7/06 ,  H04B7/10 ,  H04L5/02 ,  H04L27/26 ,  H04W48/16 ,  H04W84/12

CPC分类号： H04B7/0669 ,  H04B7/0684 ,  H04B7/10 ,  H04L5/023 ,  H04L27/2602 ,  H04W48/08 ,  H04W48/16 ,  H04W84/12

摘要： Methods and apparatus are provided for communicating pseudo-orthogonal pilot tones in a multiple antenna communication system. Data is transmitted in a multiple antenna communication system having N transmit antennas by generating a number of pilot tones for each of the N transmit antennas, wherein the pilot tones for each of the N transmit antennas are pseudo-orthogonal with each other; and transmitting the data on each of the N transmit antennas. The pilot tones are generally embedded in the data. Data is received in a multiple antenna communication system having N transmit antennas by receiving the data on each of the N transmit antennas, wherein the data includes a number of pilot tones for each of the N transmit antennas, wherein the pilot tones for each of the N transmit antennas are pseudo-orthogonal with each other. The pilot tones can be orthogonal in the frequency domain, time domain, spatial domain, or all of them.

摘要翻译： 提供了用于在多天线通信系统中传送伪正交导频音调的方法和装置。 通过为N个发送天线中的每一个生成多个导频音，在具有N个发送天线的多天线通信系统中发送数据，其中，N个发射天线中的每一个的导频音调彼此伪正交; 并且在N个发射天线中的每一个上发送数据。 导频音通常嵌入在数据中。 在具有N个发射天线的多天线通信系统中，通过接收N个发射天线中的每一个上的数据来接收数据，其中数据包括用于N个发射天线中的每一个的导频音调，其中， N个发射天线彼此伪正交。 导频音可以在频域，时域，空域或全部正交。

公开(公告)号：US08144797B2

公开(公告)日：2012-03-27

申请号：US12249739

申请日：2008-10-10

申请人： Syed Aon Mujtaba ,  Xiaowen Wang

发明人： Syed Aon Mujtaba ,  Xiaowen Wang

IPC分类号： H04B7/02

CPC分类号： H04B7/0417 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/068 ,  H04B7/0689 ,  H04L1/0016

摘要： 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.

摘要翻译： 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相应子集存储在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：US07558328B2

公开(公告)日：2009-07-07

申请号：US11223757

申请日：2005-09-09

申请人： Syed Aon Mujtaba

发明人： Syed Aon Mujtaba

IPC分类号： H04L27/28 ,  H04B7/02

CPC分类号： H04B7/0669 ,  H04B7/0684 ,  H04B7/10 ,  H04L5/023 ,  H04L27/2602 ,  H04W48/08 ,  H04W48/16 ,  H04W84/12

摘要： Methods and apparatus are provided for increasing data throughput in a multiple antenna communication system using additional subcarriers. The multiple antenna communication system includes at least one legacy system employing an N1 point fast Fourier transform (FFT) within a bandwidth, BW1. Data is transmitted using an N2 point inverse FFT within the bandwidth, BW1, wherein N2 is greater than N1; and subcarriers associated with the N2 point inverse FFT are employed to transmit the data. Data can also be transmitted using an N2 point inverse FFT within a bandwidth, BW2, wherein N2 is greater than N1 and the bandwidth, BW2, is greater than the bandwidth, BW1; and subcarriers associated with the N2 point inverse FFT are employed to transmit the data, wherein the employed subcarriers includes one or more additional subcarriers at outer edges of the bandwidth, BW1, relative to the legacy system and one or more additional subcarriers near DC relative to the legacy system.

摘要翻译： 提供了用于增加使用附加子载波的多天线通信系统中的数据吞吐量的方法和装置。 多天线通信系统包括在带宽BW1内采用N1点快速傅里叶变换（FFT）的至少一个遗留系统。 数据使用带宽BW1内的N2点逆FFT传输，其中N2大于N1; 并且采用与N2点逆FFT相关联的子载波来发送数据。 数据也可以使用带宽BW2内的N2点逆FFT传输，其中N2大于N1，带宽BW2大于带宽BW1; 并且采用与N2点逆FFT相关联的子载波来发送数据，其中所采用的子载波相对于传统系统在带宽的外边缘BW1处包括一个或多个附加子载波，以及相对于相对于传统系统的DC附近的一个或多个附加子载波 遗留系统。