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    • 75. 发明申请
    • METHODS AND APPARATUS FOR INCREASING DIVERSITY IN DOWNLINK TRANSMISSIONS
    • 在下行链路传输中增加多样性的方法和设备
    • US20140269768A1
    • 2014-09-18
    • US13826014
    • 2013-03-14
    • QUALCOMM INCORPORATED
    • Sameer VermaniBin TianAlbert va Zelst
    • H04B7/06H04L29/06
    • H04L69/22H04B7/0669H04B7/0671H04B7/068H04B7/12
    • Certain aspects of the present disclosure provide methods and apparatus for obtaining second-order downlink spatial diversity within a wireless communication system in accordance with IEEE 802.11ah, for example. One example method generally includes generating a frame comprising a preamble having at least one field, replicating at least one bit of the at least one field to form a replica of the at least one bit, transmitting the at least one bit via a first antenna, and transmitting the replica of the at least one bit via a second antenna. Another example method generally includes generating at least two space-time streams; transmitting, via a first pair of antennas, the at least two space-time streams in a first frequency band; and transmitting, via a second pair of antennas, the at least two space-time streams in a second frequency band.
    • 本公开的某些方面提供了例如根据IEEE 802.11ah在无线通信系统内获得二阶下行链路空间分集的方法和装置。 一个示例性方法通常包括生成包括具有至少一个场的前同步码的帧,复制至少一个场的至少一个比特以形成至少一个比特的副本,经由第一天线发射该至少一个比特, 以及经由第二天线发送所述至少一个比特的副本。 另一示例性方法通常包括生成至少两个时空流; 经由第一对天线在第一频带中发送所述至少两个空时流; 以及经由第二对天线在所述第二频带中发送所述至少两个时空流。
    • 76. 发明申请
    • SYSTEMS AND METHODS FOR PHASE ROTATING DUPLICATE FRAMES IN WIRELESS LAN TRANSMISSION
    • 无线局域网传输中相位旋转双向帧的系统与方法
    • US20140153507A1
    • 2014-06-05
    • US14091052
    • 2013-11-26
    • Qualcomm Incorporated
    • Lin YangBin TianSameer Vermani
    • H04L27/26
    • H04L27/2621H04L27/2602H04L27/2613
    • Methods, devices, and computer program products for optimally phase rotating duplicate frames in wireless LAN transmissions are disclosed. In one aspect, phase rotation sequences may be chosen in order to minimize a peak-to-average power ratio (PAPR) of a frame or data unit, or of a portion of a frame or data unit, where the frame contains a plurality of identical frequency segments, such as a duplicate frame. The method involves selecting a frame bandwidth, and then selecting a phase rotation sequence based upon the frame bandwidth. The method further includes generating a frame including a number of identical 1 MHz frequency segments, and rotating some of those segments relative to other segments, based on the selected phase rotation sequence. The method further includes transmitting the frame.
    • 公开了用于无线LAN传输中的最佳相位旋转重复帧的方法,设备和计算机程序产品。 在一个方面,可以选择相位旋转序列,以便最小化帧或数据单元或帧或数据单元的一部分的峰均功率比(PAPR),其中帧包含多个 相同的频段,如重复帧。 该方法包括选择帧带宽,然后基于帧带宽选择相位旋转序列。 该方法还包括基于所选择的相位旋转序列生成包括多个相同的1MHz频率段的帧,以及相对于其他段旋转那些段中的一些段。 该方法还包括发送帧。