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公开(公告)号：US07173972B2
公开(公告)日：2007-02-06
申请号：US09816810
申请日：2001-03-23
申请人： John S. Thomson , Paul J. Hustad , Ardavan M. Tehrani , Jeffrey M. Gilbert , William J. McFarland , Lars E. Thon , Yi-Hsiu Wang
发明人： John S. Thomson , Paul J. Hustad , Ardavan M. Tehrani , Jeffrey M. Gilbert , William J. McFarland , Lars E. Thon , Yi-Hsiu Wang
CPC分类号： H04L25/067 , H03M13/25 , H03M13/3961 , H03M13/41 , H03M13/6325 , H03M13/6362 , H04K3/228 , H04L1/005 , H04L1/0054 , H04L27/38
摘要： A Viterbi decoding system interprets bits in received QAM constellations as many-valued parameters rather than binary valued parameters. It performs the Viterbi algorithm using these many-valued parameters to provide results superior to hard decision decoding. Rather than applying a hard 0-1 function to the QAM data, the system uses a non-stepped linear or curved transfer function to assign values to the bits. In another aspect, a system differentiates between data bits based on their estimated reliability, giving more emphasis to decoding reliable bits than unreliable bits using any of a variety of techniques. By differentiating between god and bad bits and de-emphasizing or ignoring unreliable bits, the system can provide a significant reduction in uncorrectable errors and packet loss.
摘要翻译： 维特比解码系统将接收的QAM星座中的比特解释为多值参数，而不是二进制值参数。 它使用这些多值参数来执行维特比算法，以提供优于硬判决解码的结果。 系统使用非阶梯线性或弯曲传递函数来向位指定值，而不是将硬0-1函数应用于QAM数据。 在另一方面，一种系统基于其估计的可靠性来区分数据比特，更多地强调使用各种技术中的任何一种来解码可靠比特比不可靠比特。 通过区分神和坏位，并且不强调或忽略不可靠比特，系统可以显着减少不可校正的错误和分组丢失。
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公开(公告)号：US07129884B1
公开(公告)日：2006-10-31
申请号：US10884785
申请日：2004-07-01
摘要： A radar detection technique in a WLAN device can include a short pulse detection technique and a long pulse detection technique that can be performed using multiple receive chains. Short pulse detection is particularly effective when the incoming signal includes one or a limited number of main pulses and some residual pulses. In contrast, long pulse detection is particularly effective when the incoming signal is longer, thereby allowing various characteristics of the incoming signal to be accurately measured.
摘要翻译： WLAN设备中的雷达检测技术可以包括可以使用多个接收链执行的短脉冲检测技术和长脉冲检测技术。 当输入信号包括一个或有限数量的主脉冲和一些残留脉冲时，短脉冲检测特别有效。 相比之下，当输入信号较长时，长脉冲检测特别有效，从而允许准确地测量输入信号的各种特性。
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公开(公告)号：US08588193B1
公开(公告)日：2013-11-19
申请号：US12699758
申请日：2010-02-03
IPC分类号： H04W4/00
CPC分类号： H01Q3/30 , H04B7/0617 , H04B7/0619
摘要： Enhanced wireless speeds are obtained using multiple transmission beams. In one example a transmitter sends data packets through an antenna array using multiple spatial beams and a plurality of analog converters. A receiver receives feedback from a remote station, the feedback including a quality measure of data packets received from the transmitter. A processor to controls transmission parameters of the transmitter using the feedback, the processor having a plurality of states, in a first channel analysis state, the processor determining a beam-forming vector for the antenna array, in a second beam search and training state, the processor determining pre-coding coefficients for the data packets, and in a third high rate transmission state, the processor providing pre-coded data packets to the transmitter for transmission, wherein the processor transitions from the third state to the first state upon receiving a reduced quality measure from the remote station.
摘要翻译： 使用多个发射波束获得增强的无线速度。 在一个示例中，发射机通过使用多个空间波束和多个模拟转换器的天线阵列发送数据分组。 接收机从远程站接收反馈，反馈包括从发射机接收的数据分组的质量测量。 一种处理器，用于使用所述反馈来控制所述发射机的传输参数，所述处理器在第一信道分析状态下具有多个状态，所述处理器以第二波束搜索和训练状态确定所述天线阵列的波束形成向量， 所述处理器确定所述数据分组的预编码系数，并且在第三高速率传输状态中，所述处理器向所述发射机提供预编码的数据分组以进行传输，其中所述处理器在接收到所述第一状态时从所述第三状态转换到所述第一状态 从远程站降低质量测量。
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公开(公告)号：US20120121046A1
公开(公告)日：2012-05-17
申请号：US13356580
申请日：2012-01-23
申请人： Won-Joon Choi , Qinfang Sun , Jeffrey M. Gilbert
发明人： Won-Joon Choi , Qinfang Sun , Jeffrey M. Gilbert
CPC分类号： H04L1/08 , H04L1/0071
摘要： A system and method are disclosed for transmitting data over a wireless channel. In some embodiments, transmitting data includes receiving convolutionally encoded data and enhancing the transmission of the data by further repetition encoding the data.
摘要翻译： 公开了一种通过无线信道发送数据的系统和方法。 在一些实施例中，发送数据包括接收卷积编码的数据，并通过进一步重复编码数据来增强数据的传输。
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公开(公告)号：US07948961B2
公开(公告)日：2011-05-24
申请号：US12011404
申请日：2008-01-25
申请人： Kumar Mahesh , Karthik Krishnaswami , Karen Wang , Jeffrey M. Gilbert , Chuen-Shen (Bernard) Shung , Chih-Yuan Hsieh , Kyeong Ryu , Prakash Kamath
发明人： Kumar Mahesh , Karthik Krishnaswami , Karen Wang , Jeffrey M. Gilbert , Chuen-Shen (Bernard) Shung , Chih-Yuan Hsieh , Kyeong Ryu , Prakash Kamath
IPC分类号： H04J3/00
CPC分类号： H04L63/08 , H04L43/0864 , H04L43/50 , H04L63/0492 , H04L63/10
摘要： A wireless content protection system includes a coordinator, a source device, and a sink device. The coordinator includes a scheduler. The source and sink devices each have a content protection manager. One of the content protection manager allocates and releases bandwidth via the coordinator for a test message and a response message for a round-trip time computation. The test message is transmitted in a source-to-sink channel time block. The response message is transmitted in a sink-to-source channel time block. The round-trip time is the period between the end of the source-to-sink channel time block and the beginning of the sink-to-source channel time block.
摘要翻译： 无线内容保护系统包括协调器，源设备和宿设备。 协调器包括一个调度程序。 源和宿设备各具有内容保护管理器。 内容保护管理器之一通过协调器分配和释放用于测试消息的带宽和用于往返时间计算的响应消息。 测试消息在源到信道信道时间块中传输。 响应消息在宿到源信道时间块中发送。 往返时间是源到信道信道时间块的结束与信宿到源信道时间块的开始之间的周期。
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公开(公告)号：US20100316175A1
公开(公告)日：2010-12-16
申请号：US12800815
申请日：2010-05-21
IPC分类号： H04L7/02
CPC分类号： H04L27/0014 , H04L7/042 , H04L25/0226 , H04L2027/003
摘要： Techniques are disclosed for detecting a packet. One technique includes sampling a received signal to produce a sequence of samples wherein the sequence of samples includes a plurality of subsequences of samples; cross correlating the subsequences of samples with a known form of the subsequence to produce cross correlations; self correlating the cross correlations to produce a plurality of self correlations; summing the self correlations; and processing the sum of the self correlations.
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27.发明授权公开(公告)号：US07853216B1
公开(公告)日：2010-12-14
申请号：US11613977
申请日：2006-12-20
申请人： Donald Breslin , Jeffrey M. Gilbert
发明人： Donald Breslin , Jeffrey M. Gilbert
摘要： A method and system of optimizing transmit beam forming in a multiple radio wireless system is provided. A stimulus signal can be provided to an analog receive input of a device under test (DUT), wherein the DUT includes multiple radios. A receive phase and amplitude can be measured at baseband using the stimulus signal for each radio. At this point, a receive weight and its conjugate can be determined using the receive phases and amplitudes. A calibration vector and its conjugate can also be determined, wherein a product of the receive weight conjugate and the calibration vector conjugate generate a transmit weight. This transmit weight can be applied to transmit signals during the transmit beam forming using the multiple radios.
摘要翻译： 提供了一种在多无线电无线系统中优化发射波束形成的方法和系统。 激励信号可以被提供给待测器件（DUT）的模拟接收输入，其中DUT包括多个无线电。 可以使用每个无线电的激励信号在基带处测量接收相位和幅度。 在这一点上，可以使用接收相位和振幅来确定接收权重及其共轭。 还可以确定校准向量及其共轭，其中接收权重共轭和校准向量共轭的乘积产生传输权重。 该发送权重可以应用于在使用多个无线电的发射波束形成期间发射信号。
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公开(公告)号：US20100014504A1
公开(公告)日：2010-01-21
申请号：US12569852
申请日：2009-09-29
CPC分类号： H04B7/0421 , H04B7/0413 , H04B7/0613 , H04B7/0684 , H04L1/0041 , H04L1/0054 , H04L1/0061 , H04L1/06 , H04L1/0656 , H04L1/1819 , H04L1/1829 , H04L5/0048 , H04L25/0204 , H04L25/0226 , H04L27/0014 , H04L2025/03426
摘要： A multiple-input multiple-output (MIMO) system can transmit on multiple antennas simultaneously and receive on multiple antennas simultaneously. Unfortunately, because a legacy 802.11a/g device is not able to decode multiple data streams, such a legacy device may “stomp” on a MIMO packet by transmitting before the transmission of the MIMO packet is complete. Therefore, MIMO systems and methods are provided herein to allow legacy devices to decode the length of a MIMO packet and to restrain from transmitting during that period. These MIMO systems and methods are optimized for efficient transmission of MIMO packets.
摘要翻译： 多输入多输出（MIMO）系统可以同时在多个天线上进行发射并同时在多个天线上进行接收。 不幸的是，由于遗留802.11a / g设备不能解码多个数据流，所以这样的传统设备可能在完成MIMO分组的传输之前通过发送来“踩踏”MIMO分组。 因此，本文提供MIMO系统和方法，以允许传统设备对MIMO分组的长度进行解码并且在该时间段内抑制发射。 这些MIMO系统和方法被优化用于MIMO分组的有效传输。
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公开(公告)号：US07636400B2
公开(公告)日：2009-12-22
申请号：US11621940
申请日：2007-01-10
申请人： John S. Thomson , Paul J. Husted , Ardavan Maleki Tehrani , Jeffrey M. Gilbert , William J. McFarland , Lars E. Thon , Yi-Hsiu Wang
发明人： John S. Thomson , Paul J. Husted , Ardavan Maleki Tehrani , Jeffrey M. Gilbert , William J. McFarland , Lars E. Thon , Yi-Hsiu Wang
CPC分类号： H04L25/067 , H03M13/25 , H03M13/3961 , H03M13/41 , H03M13/6325 , H03M13/6362 , H04K3/228 , H04L1/005 , H04L1/0054 , H04L27/38
摘要： A Viterbi decoding system interprets bits in received QAM constellations as many-valued parameters rather than binary valued parameters. It performs the Viterbi algorithm using these many-valued parameters to provide results superior to hard decision decoding. Rather than applying a hard 0-1 function to the QAM data, the system uses a non-stepped linear or curved transfer function to assign values to the bits. In another aspect, a system differentiates between data bits based on their estimated reliability, giving more emphasis to decoding reliable bits than unreliable bits using any of a variety of techniques. By differentiating between god and bad bits and de-emphasizing or ignoring unreliable bits, the system can provide a significant reduction in uncorrectable errors and packet loss.
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公开(公告)号：US20090010365A1
公开(公告)日：2009-01-08
申请号：US12217300
申请日：2008-07-01
申请人： Won-Joon Choi , Qinfang Sun , Jeffrey M. Gilbert
发明人： Won-Joon Choi , Qinfang Sun , Jeffrey M. Gilbert
IPC分类号： H04L27/06
CPC分类号： H04L1/08 , H04L1/0071
摘要： A system and method are disclosed for transmitting data over a wireless channel. In some embodiments, transmitting data includes receiving convolutionally encoded data and enhancing the transmission of the data by further repetition encoding the data.
摘要翻译： 公开了一种通过无线信道发送数据的系统和方法。 在一些实施例中，发送数据包括接收卷积编码的数据，并通过进一步重复编码数据来增强数据的传输。
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