Link adaptation for OFDM systems
    2.
    发明授权
    Link adaptation for OFDM systems 有权
    OFDM系统的链路适配

    公开(公告)号:US08300716B1

    公开(公告)日:2012-10-30

    申请号:US12328443

    申请日:2008-12-04

    IPC分类号: H04L27/28

    摘要: A method of adaptively selecting a modulation and coding scheme (MCS) of a communication link includes obtaining a first parameter corresponding to a Quality of Service (QoS) requirement of the communication link, obtaining a second parameter indicative of a physical condition of the communication link, selecting an MCS based on at least the first parameter and the second parameter.

    摘要翻译: 自适应地选择通信链路的调制和编码方案(MCS)的方法包括:获得与通信链路的服务质量(QoS)要求对应的第一参数,获得指示通信链路的物理状况的第二参数 至少基于第一参数和第二参数选择MCS。

    Generalized co-phasing for multiple transmitting and receiving antennas
    4.
    发明授权
    Generalized co-phasing for multiple transmitting and receiving antennas 有权
    用于多个发射和接收天线的广义同相

    公开(公告)号:US08867635B1

    公开(公告)日:2014-10-21

    申请号:US13323781

    申请日:2011-12-12

    IPC分类号: H04K1/10 H04L27/28

    摘要: A method for determining a phase of each of a plurality of transmitting antennas in a multiple input and multiple output (MIMO) communication system includes: calculating, for first and second ones of the plurality of transmitting antennas, a value based on first and second groups of channel gains, the first group including channel gains between the first transmitting antenna and each of a plurality of receiving antennas, the second group including channel gains between the second transmitting antenna and each of the plurality of receiving antennas; and determining the phase of each of the plurality of transmitting antennas based on at least the value.

    摘要翻译: 一种用于确定多输入多输出(MIMO)通信系统中的多个发射天线中的每一个的相位的方法,包括:针对所述多个发射天线中的第一和第二发射天线的第一和第二发射天线,基于第一和第二组 所述第一组包括所述第一发射天线与所述多个接收天线中的每一个之间的信道增益,所述第二组包括所述第二发射天线与所述多个接收天线中的每一个之间的信道增益; 以及至少基于所述值确定所述多个发射天线中的每一个的相位。

    Link adaptation for OFDM systems
    6.
    发明授权
    Link adaptation for OFDM systems 有权
    OFDM系统的链路适配

    公开(公告)号:US08681888B1

    公开(公告)日:2014-03-25

    申请号:US13619523

    申请日:2012-09-14

    IPC分类号: H04L27/28

    摘要: A method includes determining one or more metrics indicative of at least one of (i) interference on a communication link, (ii) noise on the communication link, and (iii) performance of a receiver receiving packets via the communication link, selecting a modulation and coding scheme as a function of (i) the determined one or more metrics, and (ii) one or more Quality of Service requirements for the communication link, and correcting the selected modulation and coding scheme using a current value of a correction factor. The corrected modulation and coding scheme is to be used to generate one or more packets. The method also includes determining an error rate corresponding to packets previously transmitted over the communication link, and adjusting the correction factor based on the determined error rate. Adjusting the correction factor includes incrementing or decrementing the correction factor.

    摘要翻译: 一种方法包括确定一个或多个度量,其指示以下中的至少一个:(i)通信链路上的干扰,(ii)通信链路上的噪声,以及(iii)经由通信链路接收分组的接收机的性能,选择调制 以及作为(i)确定的一个或多个度量的函数的编码方案,以及(ii)通信链路的一个或多个服务质量要求,以及使用校正因子的当前值来校正所选择的调制和编码方案。 校正的调制和编码方案将用于生成一个或多个分组。 该方法还包括确定对应于先前通过通信链路发送的分组的错误率,以及基于所确定的错误率来调整校正因子。 调整校正因子包括增加或减少校正因子。

    Generalized co-phasing for multiple transmitting and receiving antennas
    7.
    发明授权
    Generalized co-phasing for multiple transmitting and receiving antennas 有权
    用于多个发射和接收天线的广义同相

    公开(公告)号:US08077785B1

    公开(公告)日:2011-12-13

    申请号:US12098924

    申请日:2008-04-07

    IPC分类号: H04K1/10 H04L27/28

    摘要: A method for determining a phase of each of a plurality of transmitting antennas in a multiple input and multiple output (MIMO) communication system includes: calculating, for first and second ones of the plurality of transmitting antennas, a value based on first and second groups of channel gains, the first group including channel gains between the first transmitting antenna and each of a plurality of receiving antennas, the second group including channel gains between the second transmitting antenna and each of the plurality of receiving antennas; and determining the phase of each of the plurality of transmitting antennas based on at least the value.

    摘要翻译: 一种用于确定多输入多输出(MIMO)通信系统中的多个发射天线中的每一个的相位的方法,包括:针对所述多个发射天线中的第一和第二发射天线的第一和第二发射天线,基于第一和第二组 所述第一组包括所述第一发射天线与所述多个接收天线中的每一个之间的信道增益,所述第二组包括所述第二发射天线与所述多个接收天线中的每一个之间的信道增益; 以及至少基于所述值确定所述多个发射天线中的每一个的相位。

    Methods and apparatus for antenna spoofing
    8.
    发明授权
    Methods and apparatus for antenna spoofing 有权
    天线欺骗的方法和装置

    公开(公告)号:US08472381B1

    公开(公告)日:2013-06-25

    申请号:US12856421

    申请日:2010-08-13

    IPC分类号: H04W4/00

    摘要: In a method for utilizing beamforming in a wireless communication system, reference signals corresponding to a first communication channel from a first communication device to a second communication device are received, and an estimate of the first communication channel is generated using the received reference signals. One or more transmit beamforming vectors are calculated using the estimate of the first communication channel, and the one or more transmit beamforming vectors are utilized to transmit signals via a second communication channel from the second communication device to the first communication device while the first communication device assumes that the first second communication device is not utilizing beamforming.

    摘要翻译: 在无线通信系统中利用波束形成的方法中,接收对应于从第一通信设备到第二通信设备的第一通信信道的参考信号,并且使用所接收的参考信号来生成第一通信信道的估计。 使用第一通信信道的估计来计算一个或多个发射波束形成向量,并且利用一个或多个发射波束成形向量将信号经由第二通信信道从第二通信设备传输到第一通信设备,同时第一通信设备 假设第一第二通信设备不使用波束形成。

    Joint estimation of channel and preamble sequence for orthogonal frequency division multiplexing systems
    9.
    发明授权
    Joint estimation of channel and preamble sequence for orthogonal frequency division multiplexing systems 有权
    正交频分复用系统的信道和前导序列的联合估计

    公开(公告)号:US08411805B1

    公开(公告)日:2013-04-02

    申请号:US12169986

    申请日:2008-07-09

    IPC分类号: H04L27/06

    摘要: A mobile station (MS) includes an estimation module, a filter module, and a filter selection module. The estimation module receives an input signal having subcarriers and generates first channel estimates based on the input signal. The subcarriers are selectively used by a base station (BS) to transmit preamble sequences when communicating with the MS. The filter module includes first and second filters. One of the first and second filters selectively filters the first channel estimates and generates second channel estimates. The filter selection module selects the one of the first and second filters based on a number of the subcarriers used to transmit the preamble sequences.

    摘要翻译: 移动台(MS)包括估计模块,滤波器模块和滤波器选择模块。 估计模块接收具有子载波的输入信号,并且基于输入信号产生第一信道估计。 当与MS通信时,子载波由基站(BS)选择性地使用来发送前导码序列。 过滤器模块包括第一和第二过滤器。 第一和第二滤波器之一选择性地滤波第一信道估计并产生第二信道估计。 滤波器选择模块基于用于发送前导码序列的子载波的数量来选择第一和第二滤波器中的一个。

    Synchronization of control signal transmissions for a multicast service
    10.
    发明授权
    Synchronization of control signal transmissions for a multicast service 有权
    多播服务的控制信号传输同步

    公开(公告)号:US09124944B1

    公开(公告)日:2015-09-01

    申请号:US13292720

    申请日:2011-11-09

    摘要: In a method for transmitting control signals in a multicast communication system, wherein the multicast communication system broadcasts one or more multicast channels, one or more occurrences of a first control signal are transmitted. The first control signal includes at least control information corresponding to the one or more multicast channels. Additionally, one or more occurrences of a second control signal are transmitted for each of the one or more multicast channels. The second control signal includes at least control information corresponding to the respective multicast channel. At least one transmission of an occurrence of the second control signal is synchronized with at least one transmission of an occurrence of the first control signal.

    摘要翻译: 在多播通信系统中发送控制信号的方法中,其中多播通信系统广播一个或多个多播信道,发送一个或多个出现的第一控制信号。 第一控制信号至少包括与一个或多个多播信道相对应的控制信息。 另外,针对一个或多个多播信道中的每一个发送一个或多个出现的第二控制信号。 第二控制信号至少包括对应于各个多播信道的控制信息。 第二控制信号的发生的至少一次发送与第一控制信号的发生的至少一次发送同步。