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    • 2. 发明申请
    • METHODS FOR PROVIDING PRECODING AND FEEDBACK AND BASE STATION
    • 提供预测和反馈和基站的方法
    • WO2012125931A1
    • 2012-09-20
    • PCT/US2012/029453
    • 2012-03-16
    • INTERDIGITAL PATENT HOLDINGS, INC.LI, Yingxue, K.SHENG, HongsanZHANG, GuodongOLESEN, Robert, L.LU, EnochLU, I-tai
    • LI, Yingxue, K.SHENG, HongsanZHANG, GuodongOLESEN, Robert, L.LU, EnochLU, I-tai
    • H04B7/06
    • H04B7/0626H04B7/0617H04B7/065
    • Beamforming, precoding, and feedback systems and methods are provided. For example, user equipment (UE) estimates an effective channel using a predetermined channel independent matrix or beamforming. Such an effective channel estimate along with other feedback information including a channel quality indicator (CQI) and a precoding matrix indicator (PMI) is fed back to an eNB. The eNB may precode data and may provide channel estimation at the eNB using a double codebook or double precoder. For example, the eNB may precode data based on the feedback information (e.g. using a channel dependent precoder) and the eNB may precode the data based on the channel independent matrix (e.g. using a channel independent precoder) that may be channel independent and/or preset (e.g. known to both eNB and UE), and may change each TTI. Such precoding along with scaling factors approximated from the PMI or CQI feedback may be used to enable the eNB to estimate a channel based covariance matrix and design the channel dependent precoder.
    • 提供波束形成,预编码和反馈系统和方法。 例如,用户设备(UE)使用预定的信道无关矩阵或波束形成来估计有效信道。 将这样的有效信道估计与包括信道质量指示符(CQI)和预编码矩阵指示符(PMI)的其他反馈信息一起反馈给eNB。 eNB可以预编码数据,并且可以使用双码本或双重预编码器在eNB处提供信道估计。 例如,eNB可以基于反馈信息(例如,使用信道相关预编码器)对数据进行预编码,并且eNB可以基于与信道无关的矩阵(例如,使用信道独立的预编码器)对数据进行预编码,该矩阵可以是信道独立的和/或 预置(例如,已知的eNB和UE),并且可以改变每个TTI。 这样的预编码以及从PMI或CQI反馈近似的缩放因子可以用于使得eNB能够估计基于信道的协方差矩阵并设计信道相关预编码器。
    • 5. 发明申请
    • WIRELESS LOCAL AREA NETWORK (WLAN) UPLINK TRANSCEIVER SYSTEMS AND METHODS
    • 无线局域网(WLAN)UPLINK收发器系统和方法
    • WO2016011333A1
    • 2016-01-21
    • PCT/US2015/040875
    • 2015-07-17
    • INTERDIGITAL PATENT HOLDINGS, INC.
    • LOU, HanqingXIA, PengfeiGHOSH, MonishaFANG, JuanOTERI, OghenekomeSHAH, Nirav, B.OLESEN, Robert, L.
    • H04W74/04H04W84/12H04B7/04
    • H04W72/1252H04B7/0452H04W52/18H04W74/04
    • Systems, methods, and instrumentalities are described to implement WLAN uplink multi-user multiple input multiple output (UL MU-MIMO) communication in an Institute of Electrical and Electronics Engineers (IEEE) 802.1 1 based system, using an IEEE 802.11 station (STA). The STA may receive a downlink poll frame from an IEEE 802.1 1 access point (AP) including one or more of a request for reporting of a transmit power, a request for a timestamp of a response frame, or a request for an estimated carrier frequency offset (CFO) value. The STA may send an uplink response frame. The uplink response frame may include one or more of transmit power parameters, timestamp parameters, or an estimated CFO value to an AP. The STA may receive a schedule frame, wherein the schedule frame may include indication to adjust one or more of a transmit power, a timing correction value, or a CFO correction value.
    • 描述了系统,方法和工具,以在使用IEEE 802.11站(STA)的电气和电子工程师协会(IEEE)基于802.11的系统中实现WLAN上行链路多用户多输入多输出(UL MU-MIMO)通信, 。 STA可以从IEEE 802.11接入点(AP)接收下行链路轮询帧,该帧包括发送功率的报告请求,响应帧的时间戳的请求或估计载波频率的请求中的一个或多个 偏移量(CFO)值。 STA可以发送上行响应帧。 上行链路响应帧可以包括发射功率参数,时间戳参数或估计的CFO值到AP的一个或多个。 STA可以接收调度帧,其中调度帧可以包括用于调整发射功率,定时校正值或CFO校正值中的一个或多个的指示。
    • 7. 发明申请
    • MULTI-BAND OPERATION FOR WIRELESS LAN SYSTEMS
    • 无线局域网系统的多条操作
    • WO2014151951A1
    • 2014-09-25
    • PCT/US2014/026720
    • 2014-03-13
    • INTERDIGITAL PATENT HOLDINGS, INC.
    • LOU, HanqingGHOSH, MonishaWANG, XiaofeiOLESEN, Robert, L.
    • H04W72/12
    • H04W74/0816H04B7/0617H04W72/1284H04W84/12H04W88/06H04W88/08
    • Systems, methods, and instrumentalities are provided to implement transmission scheduling. A multiband device may send a request via a first frequency band. The request may include a multiband Request to Send (MRTS) transmission. The request may be associated with a second frequency band and/or a heamforming training schedule. The first frequency band may be associated with a quasi-omni transmission and the second frequency band may be associated wiih a directional transmission. The first frequency band may be a 5 GHz band and the second frequency band may be a 60 GHz band. The multiband device may receive a multiband Clear to Send (MCTS) transmission via the first frequency band confirming the request. The multiband device may be configured to send a beamforming signal in accordance with the request, for example, via the second frequency band. The beamforming signal may be sent in accordance with a beamforming training schedule.
    • 提供系统,方法和手段来实现传输调度。 多频带设备可以经由第一频带发送请求。 该请求可以包括多频带请求发送(MRTS)传输。 该请求可以与第二频带和/或血红蛋白形成训练计划相关联。 第一频带可以与准全向传输相关联,并且第二频带可以与定向传输相关联。 第一频带可以是5GHz频带,第二频带可以是60GHz频带。 多频带设备可经由确认该请求的第一频带接收多频段清除发送(MCTS)传输。 多频带设备可以被配置为例如经由第二频带根据请求发送波束成形信号。 波束成形信号可以根据波束成形训练计划发送。