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    Peak-to-average power ratio management for multi-carrier modulation in wireless communication systems
    2.
    发明授权
    Peak-to-average power ratio management for multi-carrier modulation in wireless communication systems 有权
    无线通信系统中多载波调制的峰均功率比管理

    公开(公告)号：US09544897B2

    公开(公告)日：2017-01-10

    申请号：US13863256

    申请日：2013-04-15

    Applicant: QUALCOMM Incorporated

    Inventor： Rajiv Vijayan ,  Avneesh Agrawal ,  Sanjay Jha

    IPC: H04B7/00 ,  H04W72/04 ,  H04L5/00 ,  H04L27/26 ,  H04W52/34 ,  H04W52/36

    CPC classification number: H04W72/0453 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0066 ,  H04L27/2614 ,  H04W52/343 ,  H04W52/367

    Abstract: Techniques for managing peak-to-average power ratio (PAPR) for multi-carrier modulation in wireless communication systems. Different terminals in a multiple-access system may have different required transmit powers. The number of carriers to allocate to each terminal is made dependent on its required transmit power. Terminals with higher required transmit powers may be allocated fewer carriers (associated with smaller PAPR) to allow the power amplifier to operate at higher power levels. Terminals with lower required transmit powers may be allocated more carriers (associated with higher PAPR) since the power amplifier is operated at lower power levels. The specific carriers to assign to the terminals may also be determined by their transmit power levels to reduce out-of-band emissions. Terminals with higher required transmit powers may be assigned with carriers near the middle of the operating band, and terminals with lower required transmit powers may be assigned with carriers near the band edges.

    Abstract translation: 用于管理无线通信系统中多载波调制的峰均功率比（PAPR）的技术。 多址系统中的不同终端可能具有不同的所需传输功率。 分配给每个终端的载波数量取决于其所需的发射功率。 具有更高所需发射功率的终端可以被分配较少的载波（与较小的PAPR相关联），以允许功率放大器在较高的功率电平下工作。 由于功率放大器在较低的功率电平下工作，所以具有较低所需发射功率的终端可以分配更多的载波（与更高的PAPR相关联）。 分配给终端的特定载波也可以由其发射功率电平来确定，以减少带外发射。 具有更高要求的发射功率的终端可以被分配到靠近工作频带中间的载波，并且具有较低所需发射功率的终端可以被分配给带边缘附近的载波。

    Uplink pilot and signaling transmission in wireless communication systems
    4.
    发明授权
    Uplink pilot and signaling transmission in wireless communication systems 有权
    无线通信系统中的上行链路导频和信令传输

    公开(公告)号：US09155106B2

    公开(公告)日：2015-10-06

    申请号：US14162127

    申请日：2014-01-23

    Applicant: QUALCOMM Incorporated

    Inventor： Ranganathan Krishnan ,  Rajiv Vijayan ,  Tamer Adel Kadous

    IPC: H04L5/00 ,  H04W74/00 ,  H04W52/32 ,  H04L25/02 ,  H04W72/04

    CPC classification number: H04W74/004 ,  H04L5/0023 ,  H04L5/0041 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0226 ,  H04L25/0232 ,  H04L25/0248 ,  H04W52/325 ,  H04W72/0413

    Abstract: Techniques to more efficiently transmit pilot and signaling on the uplink in an OFDM system. With subband multiplexing, M usable subbands in the system are partitioned into Q disjoint groups of subbands. Each subband group may be assigned to a different terminal for uplink pilot transmission. Multiple terminals may transmit simultaneously on their assigned subbands. The transmit power for the pilot may be scaled higher to attain the same total pilot energy even though S instead of M subbands are used for pilot transmission by each terminal. Pilot transmissions from the terminals are received, and a channel estimate is derived for each terminal based on the pilot received on the assigned subbands. The channel estimate comprises a response for additional subbands not included in the assigned group. Subband multiplexing may also be used for uplink signaling transmission.

    Abstract translation: 在OFDM系统中在上行链路上更有效地发送导频和信令的技术。 通过子带复用，系统中的M个可用子带被划分成Q个不相关的子带组。 每个子带组可被分配给用于上行链路导频传输的不同终端。 多个终端可以在其分配的子带上同时发送。 即使S代替M个子带用于每个终端的导频传输，导频的发射功率也可以按比例更高以获得相同的总导频能量。 接收来自终端的导频传输，并且基于在所分配的子带上接收到的导频，为每个终端导出信道估计。 信道估计包括对未分配组中的附加子带的响应。 子带复用也可以用于上行链路信令传输。

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