Joint time/frequency domain maximum ratio combining architectures for multi input multi output wireless receivers
    11.
    发明授权
    Joint time/frequency domain maximum ratio combining architectures for multi input multi output wireless receivers 有权
    多输入多输出无线接收器的联合时间/频域最大比组合架构

    公开(公告)号:US07486751B1

    公开(公告)日:2009-02-03

    申请号:US11048075

    申请日:2005-01-31

    Abstract: A multi input multi output (MIMO) receiver for receiving signals having a synchronization (SYNC) module being responsive to a plurality of received baseband signals for processing the same to generate maximum ratio combining (MRC) parameters, complementary code keying (CCK) modulated signals and orthogonal frequency division multiplexing (OFDM) modulated signals, said SYNC module for using said MRC parameters to process said OFDM modulated signals to generate a plurality of aligned OFDM signals in time domain, said MIMO receiver for processing said plurality of aligned OFDM signals to generate a plurality of subcarriers, in accordance with an embodiment of the present invention. The MIMO receiver further including a time domain CCK MRC module being responsive to said MRC parameters for processing said CCK modulated signals in time domain to generate aligned signals, said aligned signals being combined to generate an adjusted signal for demodulation. The MIMO receiver further including a frequency domain OFDM MRC module being responsive to said plurality of said subcarriers for combining the same in the frequency domain to generate an equalized response for demodulation, wherein said MIMO receiver for processing said CCK modulated signals in the time domain and said OFDM modulated signals in the frequency domain to improve the reception of said plurality of received baseband signals.

    Abstract translation: 一种多输入多输出(MIMO)接收机,用于接收具有同步(SYNC)模块的信号,该同步(SYNC)模块响应于多个接收的基带信号进行处理,以产生最大比率组合(MRC)参数,互补码键控(CCK)调制信号 和正交频分复用(OFDM)调制信号,所述SYNC模块用于使用所述MRC参数来处理所述OFDM调制信号以在时域中产生多个对准的OFDM信号,所述MIMO接收机用于处理所述多个对准的OFDM信号以产生 多个子载波,根据本发明的实施例。 所述MIMO接收机还包括响应于所述MRC参数的时域CCK MRC模块,用于在时域中处理所述CCK调制信号以生成对准的信号,所述对准的信号被组合以产生用于解调的经调整的信号。 MIMO接收机还包括响应于所述多个所述子载波的频域OFDM MRC模块,用于在频域中组合它们以产生用于解调的均衡响应,其中所述MIMO接收机用于在时域中处理所述CCK调制信号,以及 所述OFDM调制信号在频域中以改善所述多个接收的基带信号的接收。

    Efficient subcarrier equalization to enhance receiver performance
    12.
    发明授权
    Efficient subcarrier equalization to enhance receiver performance 有权
    高效的副载波均衡以增强接收机性能

    公开(公告)号:US07369626B1

    公开(公告)日:2008-05-06

    申请号:US10782351

    申请日:2004-02-18

    Abstract: A modem system for receiving and transmitting signals having a frequency domain equalizer (FEQ) block being responsive to a frequency channel response for processing the same to generate one or more initial FEQ coefficients (FEQ1), the modem system is responsive to an input signal for processing the same to generate frequency channel response, the input signal being generated from a transmitted signal, FEQ block using FEQ1 to generate an equalized Signal, modem system demodulating equalized Signal to generate a demodulated Signal symbol, in accordance with an embodiment of the present invention.

    Abstract translation: 一种调制解调器系统,用于接收和发送具有频域均衡器(FEQ)块的信号,所述频域均衡器(FEQ)块响应于频率响应来处理该频率响应以产生一个或多个初始FEQ系数(FEQ 1),所述调制解调器系统响应于输入信号 为了处理它以产生频道信号响应,根据传输信号产生的输入信号,使用FEQ1的FEQ块,以产生均衡的信号,调制解调器系统解调均衡信号以产生解调的信号符号,根据 本发明。

    Efficient method for multi-path resistant carrier and timing frequency offset detection
    13.
    发明授权
    Efficient method for multi-path resistant carrier and timing frequency offset detection 有权
    多路抗电荷载波和定时频偏检测的有效方法

    公开(公告)号:US07245677B1

    公开(公告)日:2007-07-17

    申请号:US10797299

    申请日:2004-03-09

    Abstract: A modem receiver for receiving signals having a frequency domain equalizer training module (FTM) being responsive to a frequency channel response for processing the same to generate one or more frequency domain equalizer (FEQ) coefficients, said modem receiver being responsive to an input signal for processing the same to generate said frequency channel response, said input signal being generated from transmission of a transmitted signal, said frequency channel response for including one or more pilot tones, said FEQ coefficients for including one or more pilot tone FEQ coefficients, in accordance with an embodiment of the present invention. The modem receiver further includes an offset weight determination (OWD) module being responsive to said pilot tone FEQ coefficients for processing the same to generate one or more carrier weights, said modem receiver for using said carrier weights to generate a carrier offset, said OWD module for using said pilot tone FEQ coefficients to generate one or more timing weights, said modem receiver for using said timing weights to generate a timing offset, said modem receiver for reducing the effects of faded pilot tones on determination of said timing offset and said carrier offset between said transmitted signal and said input signal.

    Abstract translation: 一种调制解调器接收机,用于接收具有频域均衡器训练模块(FTM)的信号,所述频域均衡器训练模块(FTM)响应于频道响应来处理该频域响应以产生一个或多个频域均衡器(FEQ)系数,所述调制解调器接收机响应于输入信号 对其进行处理以产生所述频道响应,所述输入信号是从发射信号的传输产生的,所述频道响应用于包括一个或多个导频音,所述FEQ系数用于包括一个或多个导频音FEQ系数,根据 本发明的一个实施例。 所述调制解调器接收机还包括偏移权重确定(OWD)模块,响应于所述导频音FEQ系数用于处理它们以产生一个或多个载波权重,所述调制解调器接收机用于使用所述载波权重来产生载波偏移量,所述OWD模块 用于使用所述导频音FEQ系数来产生一个或多个定时权重,所述调制解调器接收机用于使用所述定时权重来产生定时偏移量,所述调制解调器接收机用于在确定所述定时偏移和所述载波偏移时减少褪色导频音的影响 在所述发送信号和所述输入信号之间。

    Method and apparatus for calibration of an implicit beamforming wireless system
    14.
    发明授权
    Method and apparatus for calibration of an implicit beamforming wireless system 有权
    用于校准隐式波束形成无线系统的方法和装置

    公开(公告)号:US08797948B2

    公开(公告)日:2014-08-05

    申请号:US12692356

    申请日:2010-01-22

    CPC classification number: H04B7/0626 H04B7/0632 H04B17/12 H04W16/28

    Abstract: A first embodiment is a method of calibrating an implicit beamforming wireless system wherein the implicit wireless system comprises a beamformer and a beamformee. The method comprises associating the beamformer with the beamformee, sending a sounding packet from the beamformer to the beamformee, receiving a sounding response at the beamformer wherein the sounding response contains explicit channel state information as estimated by beamformee, computing implicit channel state information at the beamformer based on transmissions from the beamformee, passing explicit and implicit channel state information into the beamformer, computing a set of compensation parameters and loading the set of compensation parameters into the beamformer thereby enabling the beamformer to implicitly beamform to a device that does not support explicit beamforming.

    Abstract translation: 第一实施例是校准隐式波束成形无线系统的方法,其中隐式无线系统包括波束形成器和波束形成器。 该方法包括将波束形成器与波束形成器相关联,将波束形成器的探测分组发送到波束成形器,在波束形成器处接收探测响应,其中探测响应包含由波束形成器估计的显式信道状态信息,在波束形成器处计算隐式信道状态信息 基于来自波束形成器的传输,将显式和隐式信道状态信息传递到波束形成器中,计算一组补偿参数并将该组补偿参数加载到波束形成器中,从而使波束形成器能够隐式地波束形成不支持显式波束成形的设备 。

    Method and apparatus to allow coexistence between wireless devices
    15.
    发明授权
    Method and apparatus to allow coexistence between wireless devices 有权
    允许无线设备之间共存的方法和装置

    公开(公告)号:US08081615B2

    公开(公告)日:2011-12-20

    申请号:US12471187

    申请日:2009-05-22

    CPC classification number: H04W4/20

    Abstract: The present invention relates generally to wireless transceivers, and more particularly but not exclusively to non 802.11 detection and avoidance methodologies for wireless devices including transceivers. In one or more implementations, a method for detecting non 802.11 operating in the unlicensed 5.25-5.35 and 5.47-10.725 GHz radio bands, using wireless devices, such as AP, are provided. An AP is used to automatically detect the presence of non 802.11 on all channels in these bands, alert all of its clients, and move to another channel that is known to be devoid of non 802.11 using one or more implementations.

    Abstract translation: 本发明一般涉及无线收发器,更具体地但非排他地涉及用于包括收发器的无线设备的非802.11检测和回避方法。 在一个或多个实现中,提供了一种使用诸如AP之类的无线设备来检测未经授权的5.25-5.35和5.47-10.725GHz无线电频段中的非802.11操作的方法。 AP用于自动检测这些频带中所有信道上非802.11的存在,提醒其所有客户端,并使用一个或多个实现移动到已知无802.11的另一个信道。

    Nested preamble for multi input multi output orthogonal frequency division multiplexing
    16.
    发明授权
    Nested preamble for multi input multi output orthogonal frequency division multiplexing 有权
    多输入多输出正交频分复用的嵌套前导码

    公开(公告)号:US07856068B1

    公开(公告)日:2010-12-21

    申请号:US11475606

    申请日:2006-06-26

    Abstract: A multi input multi output (MIMO) system for transmitting and receiving packets having a nested preamble format included in said packets and having poly-carrier long training sequence (LTS) and signal field (SIG) for training receivers, in accordance with an embodiment of the present invention. Said packets being transmitted using the modulation scheme of a wireless local area network (WLAN) standard, said nested preamble format for allowing said receivers to use one or more receiver antennas to interpret said LTS and said SIG to increase the efficiency of said MIMO system.

    Abstract translation: 一种多输入多输出(MIMO)系统,用于发送和接收包括在所述分组中的具有嵌套前导码格式的分组,并且具有用于训练接收机的多载波长训练序列(LTS)和信号字段(SIG) 本发明。 所述分组使用无线局域网(WLAN)标准的调制方案发送,所述嵌套前导码格式允许所述接收机使用一个或多个接收机天线来解释所述LTS和所述SIG,以提高所述MIMO系统的效率。

    Method and apparatus for closed loop beamforming in wireless communication systems
    17.
    发明授权
    Method and apparatus for closed loop beamforming in wireless communication systems 有权
    无线通信系统中闭环波束成形的方法和装置

    公开(公告)号:US08687717B2

    公开(公告)日:2014-04-01

    申请号:US12500154

    申请日:2009-07-09

    CPC classification number: H04B7/0617 H04B7/0632

    Abstract: Varying embodiments of the present invention describe a closed loop system for processing the beamforming information, qualifying the expected performance, activating and deactivating the beamforming system. A first embodiment is a method for closed loop beamforming in a wireless communication system, the system comprising a transmitter and a receiver, the method comprising initiating beamforming on a communication channel between the transmitter and the receiver, monitoring the communication channel, periodically determining a condition of the communication channel and controlling beamforming based on the condition of the communication channel.

    Abstract translation: 本发明的不同实施例描述了一种用于处理波束形成信息的闭环系统,限定预期的性能,启动和停用波束形成系统。 第一实施例是在无线通信系统中闭环波束成形的方法,该系统包括发射机和接收机,该方法包括在发射机与接收机之间的通信信道上发起波束成形,监视通信信道,周期性地确定条件 的通信信道,并且基于通信信道的条件来控制波束成形。

    Carrier recovery architectures for multi input multi output orthogonal frequency division multiplexing receivers
    18.
    发明授权
    Carrier recovery architectures for multi input multi output orthogonal frequency division multiplexing receivers 失效
    多输入多输出正交频分复用接收机的载波恢复架构

    公开(公告)号:US07545891B1

    公开(公告)日:2009-06-09

    申请号:US11074921

    申请日:2005-03-07

    Abstract: A modem system for transmitting and receiving signals having a frequency domain equalizer (FEQ) being responsive to a plurality of received data symbols for processing the same to generate one or more equalized data symbols, said modem system being responsive to a plurality of received baseband signals for processing the same to generate said plurality of received data symbols, said plurality of received data symbols for including one or more sets of pilot tones, said FEQ for processing said sets of pilot tones to generate one or more sets of equalized sets of pilot tones, in accordance with an embodiment of the present invention. The modem system further includes a frequency offset detection module being responsive to said sets of equalized pilot tones to generate one or more instantaneous carrier offsets, said modem system for processing said instantaneous carrier offsets to generate one or more frequency corrections for applying the same to said plurality of received baseband signals to remove carrier offsets therefrom, wherein the flexible architecture of said modem system allows for removal of said carrier offsets to improve reception of said plurality of received baseband signals.

    Abstract translation: 一种用于发送和接收具有频域均衡器(FEQ)的信号的调制解调器系统,该频域均衡器响应于多个接收的数据符号进行处理以产生一个或多个均衡的数据符号,所述调制解调器系统响应于多个接收的基带信号 用于处理它们以产生所述多个接收数据符号,所述多个接收数据符号用于包括一组或多组导频音,所述FEQ用于处理所述导频音组以产生一组或多组均衡的导频音集 ,根据本发明的实施例。 调制解调器系统还包括频率偏移检测模块,响应于所述均衡导频音调集合以产生一个或多个瞬时载波偏移,所述调制解调器系统用于处理所述瞬时载波偏移以产生一个或多个频率校正,以将其应用于所述 多个接收的基带信号以从其中去除载波偏移,其中所述调制解调器系统的灵活架构允许去除所述载波偏移以改善所述多个接收的基带信号的接收。

    Symbol-based decision feedback equalizer (DFE) optimal equalization method and apparatus with maximum likelihood sequence estimation for wireless receivers under multipath channels
    19.
    发明授权
    Symbol-based decision feedback equalizer (DFE) optimal equalization method and apparatus with maximum likelihood sequence estimation for wireless receivers under multipath channels 有权
    基于符号的决策反馈均衡器(DFE)最优均衡方法和在多径信道下的无线接收机的最大似然序列估计的装置

    公开(公告)号:US07266146B2

    公开(公告)日:2007-09-04

    申请号:US10402710

    申请日:2003-03-28

    Abstract: A maximum likelihood sequence estimator (MLSE) equalizer device being included in an MLSE sub-receiver includes a feedforward circuit responsive to input data for processing the same to generate feedforward circuit output, said input data being generated from transmitted data being transmitted by wireless transmission, in accordance with an embodiment of the present invention. The MLSE equalizer device further includes a feedback circuit responsive to said input data for processing the same to generate feedback circuit output. The MLSE equalizer device further includes an equalizer training module responsive to said feedforward circuit output and said feedback circuit output for training said MLSE equalizer device by minimizing the difference between said feedforward circuit output and said feedback circuit output, said MLSE equalizer device being trained to generate equalized data, said MLSE sub-receiver for decoding said equalized data to generate decoded transmitted data by mitigating the effects of multi-path communication channel due to wireless transmission of said transmitted data.

    Abstract translation: 包括在MLSE子接收机中的最大似然序列估计器(MLSE)均衡器装置包括响应于输入数据进行处理以产生前馈电路输出的前馈电路,所述输入数据是通过无线传输发送的传输数据产生的, 根据本发明的实施例。 MLSE均衡器装置还包括响应于所述输入数据的反馈电路,用于对其进行处理以产生反馈电路输出。 MLSE均衡器装置还包括响应于所述前馈电路输出的均衡器训练模块和所述反馈电路输出,用于通过最小化所述前馈电路输出和所述反馈电路输出之间的差来训练所述MLSE均衡器装置,所述MLSE均衡器装置经过训练以产生 所述MLSE子接收机用于解码所述均衡数据以通过减轻由于所述传输数据的无线传输而导致的多径通信信道的影响来生成解码的发送数据。

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