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    • 85. 发明授权
    • Peak-to-average power ratio management for multi-carrier modulation in wireless communication systems
    • 无线通信系统中多载波调制的峰均功率比管理
    • US08811973B2
    • 2014-08-19
    • US12170560
    • 2008-07-10
    • Rajiv VijayanAvneesh AgrawalSanjay Jha
    • Rajiv VijayanAvneesh AgrawalSanjay Jha
    • H04W4/00
    • H04W72/0453H04L5/0007H04L5/0037H04L5/0066H04L27/2614H04W52/343H04W52/367
    • 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.
    • 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。
    • 88. 发明授权
    • Multi-hop wireless mesh network medium access control protocol
    • 多跳无线网状网络介质访问控制协议
    • US08576872B2
    • 2013-11-05
    • US11548561
    • 2006-10-11
    • Avneesh AgrawalDavid Jonathan JulianNikhil Jain
    • Avneesh AgrawalDavid Jonathan JulianNikhil Jain
    • H04L12/413
    • H04W74/0816H04W52/325H04W72/0406H04W74/0808H04W84/18
    • Systems and methodologies are described that facilitate mitigating a hidden node condition in a wireless mesh network wherein nodes utilize a request-to-send/clear-to-send (RTS/CTS) protocol in conjunction with an asynchronous hybrid automatic repeat request protocol. For instance, a node may contend for a set of subcarriers by sending an RTS signal over the desired subcarriers, and may receive a CTS signal over the contended subcarriers, wherein the CTS signal indicates which subcarriers the node may transmit data over. If another node has won the contention for a particular subcarrier, requesting node may adjust a power level at which it transmits an RTS or a data packet in order to permit the requesting node to utilize the subcarrier without interfering with the winning node.
    • 描述了有助于减轻无线网状网络中的隐藏节点条件的系统和方法,其中节点结合异步混合自动重复请求协议利用请求发送/清除发送(RTS / CTS)协议。 例如,节点可以通过在期望的子载波上发送RTS信号来竞争一组子载波,并且可以在竞争的子载波上接收CTS信号,其中CTS信号指示节点可以传送数据的哪些子载波。 如果另一个节点已经赢得了特定子载波的争用,则请求节点可以调整其发送RTS或数据分组的功率电平,以便允许请求节点利用子载波而不干扰获胜节点。