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公开(公告)号：US08737189B2
公开(公告)日：2014-05-27
申请号：US11151772
申请日：2005-06-09
IPC分类号： H04J11/00
CPC分类号： H04B7/0667 , H04B7/02 , H04B7/024 , H04B7/028 , H04B7/0404 , H04B7/0413 , H04B7/0452 , H04B7/0486 , H04B7/0495 , H04B7/0669 , H04L5/0026 , H04L5/0048 , H04L5/005 , H04L5/0051 , H04L5/0053 , H04L25/0226 , H04L25/03929 , H04L27/2613 , H04L29/06102 , H04L29/0653 , H04L29/0863 , H04L67/147 , H04L69/161 , H04W52/0225 , H04W52/52 , H04W84/12 , Y02D70/142 , Y02D70/442
摘要： Aspects of the invention described herein may enable a greenfield access mode in IEEE 802.11n WLAN systems in comparison to an alternative approach that may not provide greenfield access. The utilization of greenfield access may reduce the portion of time required to transmit data due to overhead comprising preamble fields and header fields. This may enable higher data throughput rates to be achieved. This may further enable more robust transmission of data by enabling comparable data rates to be maintained while reducing the coding rate of encoded transmitted data. The reduction of the coding rate may enable comparable data rates to be maintained for transmission via RF channels characterized by lower SNR while still achieving desired target levels of packet error rates. In another aspect of the invention, mixed mode access may be achieved while reducing the portion of time required for transmitting data due to overhead.
摘要翻译： 与可能不提供绿地访问的替代方法相比，本文所述的本发明的方面可以实现IEEE 802.11n WLAN系统中的绿地接入模式。 绿地访问的利用可以减少由于包括前导字段和报头字段的开销而发送数据所需的时间部分。 这可以实现更高的数据吞吐率。 这可以通过在减少编码的发送数据的编码率的同时保持可比较的数据速率来进一步实现数据的更鲁棒的传输。 编码率的降低可以使得能够维持用于通过以较低SNR表征的RF信道的传输的可比数据速率，同时仍然实现期望的目标级别的分组错误率。 在本发明的另一方面，可以在减少由于开销而发送数据所需的时间的部分的同时实现混合模式访问。
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公开(公告)号：US08964895B2
公开(公告)日：2015-02-24
申请号：US13245362
申请日：2011-09-26
申请人： Christopher J. Hansen , Jason A. Trachewsky , Nambirajan Seshadri , Kelly Brian Cameron , Hau Thien Tran , Ba-Zhong Shen
发明人： Christopher J. Hansen , Jason A. Trachewsky , Nambirajan Seshadri , Kelly Brian Cameron , Hau Thien Tran , Ba-Zhong Shen
CPC分类号： H04W4/18 , H04L1/0057 , H04L1/0059 , H04L1/0065 , H04L1/0066 , H04L1/0068 , H04L1/0071 , H04L1/0618 , H04L25/03866 , H04L27/2601 , H04W84/12 , H04W88/10
摘要： A wireless local area network (WLAN) transmitter includes a baseband processing module and a plurality of radio frequency (RF) transmitters. The processing module selects one of a plurality of modes of operation based on a mode selection signal. The processing module determines a number of transmit streams based on the mode selection signal. The processing of the data further continues by converting encoded data into streams of symbols in accordance with the number of transmit streams and the mode selection signal. A number of the plurality of RF transmitters are enabled based on the mode selection signal to convert a corresponding one of the streams of symbols into a corresponding RF signal such that a corresponding number of RF signals is produced.
摘要翻译： 无线局域网（WLAN）发射机包括基带处理模块和多个射频（RF）发射机。 处理模块基于模式选择信号选择多种操作模式中的一种。 处理模块基于模式选择信号确定多个发送流。 根据发送流的数量和模式选择信号，将编码数据转换为符号流，继续处理数据。 基于模式选择信号启用多个RF发射机的数量，以将符号流中的相应一个码流转换为对应的RF信号，从而产生相应数量的RF信号。
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公开(公告)号：US08576695B2
公开(公告)日：2013-11-05
申请号：US13593745
申请日：2012-08-24
申请人： Christopher J. Hansen , Jason A. Trachewsky , Rajendra Tushar Moorti , Matthew James Fischer , Christopher Young
发明人： Christopher J. Hansen , Jason A. Trachewsky , Rajendra Tushar Moorti , Matthew James Fischer , Christopher Young
IPC分类号： H04J3/06
CPC分类号： H04B7/0667
摘要： A method for generating a preamble of a frame for a multiple input multiple output (MIMO) wireless communication begins by, for each transmit antenna, generating a carrier detect field. The method continues by, for a first grouping of the transmit antennas, generating a first guard interval, and at least one channel sounding field. Continuing, the method applies cyclical shift prior to transmission via the first grouping of the transmit antennas. When the MIMO wireless communication includes more than the first grouping of the transmit antennas, for another grouping of the transmit antennas. For the another grouping of the transmit antennas, generating at least one other channel sounding field. The method proceeds by generating the first guard interval prior to the at least one other channel sounding field, and applying another cyclical shift prior to transmission via the another grouping of the transmit antennas.
摘要翻译： 用于生成多输入多输出（MIMO）无线通信的帧的前同步码的方法由每个发射天线开始，生成载波检测场。 对于发射天线的第一组，产生第一保护间隔和至少一个信道探测场，继续该方法。 继续地，该方法在通过发射天线的第一组发射之前应用周期性移位。 当MIMO无线通信包括多于发射天线的第一组时，对于另一组发射天线。 对于发射天线的另一组，产生至少一个其它信道探测场。 该方法通过在至少一个其它信道探测场之前产生第一保护间隔，并且在经由另一组发射天线的传输之前应用另一个循环移位来进行。
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4.发明申请Feedback of Channel Information in a Closed Loop Beamforming Wireless Communication System 有权闭环波束形成无线通信系统中信道信息的反馈公开(公告)号：US20130129000A1
公开(公告)日：2013-05-23
申请号：US13729881
申请日：2012-12-28
IPC分类号： H04W80/00
CPC分类号： H04W80/00 , H04B7/0421 , H04B7/0617 , H04B7/0628 , H04B7/0634 , H04L1/0026 , H04L1/0045 , H04L1/0068 , H04L1/06 , H04L27/2601
摘要： A method for feeding back transmitter beamforming information from a receiving wireless communication device to a transmitting wireless communication device includes a receiving wireless communication device receiving a preamble sequence from the transmitting wireless device. The receiving wireless device estimates a channel response based upon the preamble sequence and then determines an estimated transmitter beamforming unitary matrix based upon the channel response and a receiver beamforming unitary matrix. The receiving wireless device then decomposes the estimated transmitter beamforming unitary matrix to produce the transmitter beamforming information and then wirelessly sends the transmitter beamforming information to the transmitting wireless device.
摘要翻译： 将发射机波束形成信息从接收无线通信设备反馈到发射无线通信设备的方法包括从发射无线设备接收前同步码序列的接收无线通信设备。 接收无线设备基于前导序列估计信道响应，然后基于信道响应和接收机波束成形单位矩阵来确定估计的发射机波束成形单位矩阵。 接收无线设备然后分解估计的发射机波束成形单位矩阵以产生发射机波束形成信息，然后将发射机波束成形信息无线发送到发射无线设备。
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公开(公告)号：US08351399B2
公开(公告)日：2013-01-08
申请号：US12828561
申请日：2010-07-01
申请人： Christopher J. Hansen , Jason A. Trachewsky , R. Tushar Moorti , Matthew J. Fischer , Christopher Young
发明人： Christopher J. Hansen , Jason A. Trachewsky , R. Tushar Moorti , Matthew J. Fischer , Christopher Young
IPC分类号： H04Q7/00
CPC分类号： H04W72/044 , H04L1/0001 , H04L1/0002 , H04L1/0003 , H04L1/06 , H04L1/1867 , H04L25/0226 , H04L25/0228 , H04L27/2613 , H04W84/12
摘要： A method for multiple input multiple output wireless communication begins by determining protocols of wireless communication devices within a proximal region. The method continues by determining whether the protocols of the wireless communication devices within the proximal region are of a like protocol. The method continues by determining the number of transmit antennas. The method continues, when the protocols of the wireless communication devices within the proximal region are of the like protocol, formatting a preamble of a frame of the wireless communication utilizing at least one of cyclic shifting of symbols, cyclic shifting of tones, sparse tone allocation, and sparse symbol allocation based on the number of transmit antennas.
摘要翻译： 多输入多输出无线通信的方法通过确定近端区域内的无线通信设备的协议来开始。 该方法通过确定近端区域内的无线通信设备的协议是否具有类似协议来继续。 该方法通过确定发射天线的数量继续。 该方法继续，当近端区域内的无线通信设备的协议类似协议时，利用符号的循环移位，音调的循环移位，稀疏音调配置中的至少一个来格式化无线通信的帧的前导码 ，以及基于发射天线数量的稀疏符号分配。
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公开(公告)号：US08284867B2
公开(公告)日：2012-10-09
申请号：US13239301
申请日：2011-09-21
IPC分类号： H04L27/00
CPC分类号： H04B7/0613
摘要： A preamble of a frame for a multiple input multiple output (MIMO) wireless communication for a first transmit antenna of the MIMO communication includes a legacy preamble portion in accordance with a legacy wireless communication protocol. The preamble of the frame for the MIMO wireless communication for the first transmit antenna also includes a current protocol preamble portion in accordance with a protocol of the MIMO wireless communication. The preamble of a frame for at least a second antenna of the MIMO communication includes a cyclically shifted legacy preamble portion for the frame. The preamble of the frame for the MIMO wireless communication for the second transmit antenna also includes a second current protocol preamble portion in accordance with a protocol of the MIMO wireless communication.
摘要翻译： 用于MIMO通信的第一发射天线的多输入多输出（MIMO）无线通信的帧的前导码包括根据传统无线通信协议的传统前导码部分。 用于第一发射天线的MIMO无线通信的帧的前导码还包括根据MIMO无线通信的协议的当前协议前同步码部分。 用于MIMO通信的至少第二天线的帧的前导码包括用于该帧的循环移位的传统前同步码部分。 用于第二发射天线的MIMO无线通信的帧的前导码还包括根据MIMO无线通信的协议的第二当前协议前同步码部分。
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公开(公告)号：US08144798B2
公开(公告)日：2012-03-27
申请号：US12493896
申请日：2009-06-29
IPC分类号： H04B7/02
CPC分类号： H04B7/0613
摘要： A method for configuring a multiple input multiple output (MIMO) wireless communication begins by generating a plurality of preambles for a plurality of transmit antennas. Each of the plurality of preambles includes a carrier detection sequence at a legacy transmit rate, a first channel sounding at the legacy transmit rate, a signal field at the legacy transmit rate, and Z−1 channel soundings at a MIMO transmit rate, where L corresponds to a number of channel soundings. The method continues by simultaneously transmitting the plurality of preambles via the plurality of transmit antennas.
摘要翻译： 一种用于配置多输入多输出（MIMO）无线通信的方法开始于为多个发射天线生成多个前同步码。 多个前导码中的每一个包括传统发送速率的载波检测序列，以传统发送速率发声的第一信道，传统发送速率的信号字段和MIMO发送速率的Z-1信道探测，其中L 对应于多个通道探测。 该方法通过经由多个发射天线同时发送多个前导码来继续。
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公开(公告)号：US20120014364A1
公开(公告)日：2012-01-19
申请号：US13245362
申请日：2011-09-26
申请人： Christopher J. Hansen , Jason A. Trachewsky , Nambirajan Seshadri , Kelly Brian Cameron , Hau Thien Tran , Ba-Zhong Shen
发明人： Christopher J. Hansen , Jason A. Trachewsky , Nambirajan Seshadri , Kelly Brian Cameron , Hau Thien Tran , Ba-Zhong Shen
IPC分类号： H04W92/00
CPC分类号： H04W4/18 , H04L1/0057 , H04L1/0059 , H04L1/0065 , H04L1/0066 , H04L1/0068 , H04L1/0071 , H04L1/0618 , H04L25/03866 , H04L27/2601 , H04W84/12 , H04W88/10
摘要： A wireless local area network (WLAN) transmitter includes a baseband processing module and a plurality of radio frequency (RF) transmitters. The processing module selects one of a plurality of modes of operation based on a mode selection signal. The processing module determines a number of transmit streams based on the mode selection signal. The processing of the data further continues by converting encoded data into streams of symbols in accordance with the number of transmit streams and the mode selection signal. A number of the plurality of RF transmitters are enabled based on the mode selection signal to convert a corresponding one of the streams of symbols into a corresponding RF signal such that a corresponding number of RF signals is produced.
摘要翻译： 无线局域网（WLAN）发射机包括基带处理模块和多个射频（RF）发射机。 处理模块基于模式选择信号选择多种操作模式中的一种。 处理模块基于模式选择信号确定多个发送流。 根据发送流的数量和模式选择信号，将编码数据转换为符号流，继续处理数据。 基于模式选择信号启用多个RF发射机的数量，以将符号流中的相应一个码流转换为对应的RF信号，从而产生相应数量的RF信号。
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公开(公告)号：US20120008610A1
公开(公告)日：2012-01-12
申请号：US13239301
申请日：2011-09-21
IPC分类号： H04W40/00
CPC分类号： H04B7/0613
摘要： A preamble of a frame for a multiple input multiple output (MIMO) wireless communication for a first transmit antenna of the MIMO communication includes a legacy preamble portion in accordance with a legacy wireless communication protocol. The preamble of the frame for the MIMO wireless communication for the first transmit antenna also includes a current protocol preamble portion in accordance with a protocol of the MIMO wireless communication. The preamble of a frame for at least a second antenna of the MIMO communication includes a cyclically shifted legacy preamble portion for the frame. The preamble of the frame for the MIMO wireless communication for the second transmit antenna also includes a second current protocol preamble portion in accordance with a protocol of the MIMO wireless communication.
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10.发明申请公开(公告)号：US20110292883A9
公开(公告)日：2011-12-01
申请号：US11825868
申请日：2007-07-10
IPC分类号： H04Q7/00
CPC分类号： H04W16/14 , H04L5/0023 , H04L5/0048 , H04L25/0226 , H04L27/2613 , H04W24/00 , H04W84/12 , H04W88/06
摘要： A method for generating a preamble of a frame for a wide-bandwidth channel wireless communication begins by generating a legacy carrier detect field. The method continues by generating a channel sounding field, wherein the channel sounding field includes a plurality of tones within the wide-bandwidth channel, wherein a first set of the plurality of tones corresponds to tones of a legacy channel sounding field. The method continues by generating a legacy signal field, wherein, in time, the legacy signal field follows the channel sounding field, which follows the legacy carrier detect field.
摘要翻译： 用于生成用于宽带宽信道无线通信的帧的前导码的方法开始于生成传统载波检测字段。 该方法通过产生信道探测字段继续，其中信道探测字段包括宽带宽信道内的多个音调，其中多个音调的第一组对应于传统信道探测字段的音调。 该方法通过生成遗留信号字段而继续，其中，在时间上，传统信号字段跟随在传统载波检测字段之后的信道探测字段。
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