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    • 4. 发明申请
    • METHOD AND APPARATUS FOR ORTHOGONAL PILOT TONE MAPPING IN MULTIPLE-IN AND MULTIPLE-OUT (MINO) AND SPATIAL DIVISION MULTIPLE ACCESS ( SDMA) SYSTEMS
    • 用于多路和多路(MINO)和空间多路访问(SDMA)系统中的正交导频色调映射的方法和装置
    • WO2010093897A2
    • 2010-08-19
    • PCT/US2010/024067
    • 2010-02-12
    • QUALCOMM INCORPORATEDVAN ZELST, AlbertVAN NEE, Didier, Johannes Richard
    • VAN ZELST, AlbertVAN NEE, Didier, Johannes Richard
    • H04L5/00
    • H04B7/0447H04B7/0689H04L5/0048
    • Methods and apparatus for orthogonal pilot tone mapping in Multiple-In and Multiple-Out (MIMO) and Spatial Division Multiple Access (SDMA) systems are disclosed. An aspect of the method includes identifying a plurality of symbol periods within which symbols representing encoded data are to be transmitted in a plurality of spatial streams over a communication channel; identifying a plurality of pilot tone values for a plurality of pilot tones in the plurality of symbol periods to create a pilot tone mapping, wherein the identified pilot tone values are such that a receiver, when receiving at least some of the plurality of pilot tones, is provided with signals enabling the receiver to characterize and mitigate any communication impairments, and potentially obtain transmit spatial stream diversity benefits, wherein at least two of the pilot tone values in the pilot tone mapping are orthogonal when the symbols are combined over at least one dimension; and transmitting the symbols and the plurality of pilot tones over the plurality of spatial streams for the plurality of symbol periods.
    • 公开了多输入多输出(MIMO)和空分多址(SDMA)系统中的正交导频音调映射的方法和装置。 该方法的一个方面包括识别多个符号周期,在多个符号周期内,通过通信信道在多个空间流中发送表示编码数据的符号; 识别多个符号周期中的多个导频音调的多个导频音调值,以创建导频音调映射,其中所识别的导频音调值使得接收机在接收到多个导频音调中的至少一些时, 被提供有使得接收机能够表征和减轻任何通信损伤并且潜在地获得发射空间流分集益处的信号,其中当符号在至少一维上被组合时,导频色调映射中的至少两个导频音值是正交的 ; 以及在多个符号周期的多个空间流上发送符号和多个导频音调。
    • 8. 发明申请
    • REMOTE STATION PROTECTION
    • 远程站保护
    • WO2015167823A1
    • 2015-11-05
    • PCT/US2015/026352
    • 2015-04-17
    • QUALCOMM INCORPORATED
    • WENTINK, Maarten, MenzoVAN ZELST, Albert
    • H04W74/08H04W84/12
    • H04L63/20H04L5/0007H04L5/0073H04W74/0816H04W84/12
    • Methods, systems, and devices are described for selectively enabling legacy protection in a WLAN. A method may include receiving, by an access point, a DSSS signal from a station, and activating legacy protection within a WI_AN of the access point based at least in part on the received DSSS signal. For instance when a station cannot be initially detected, the access point may transmit an OFDM signal indicating a NAV period associated with a remote station initial access period. The access point may then receive a DSSS transmission from a remote station during the remote station initial access period. A method may include receiving, at a wireless station, an indication of a NAV period associated with remote station initial access, monitoring for radio transmissions during the NAV period, and transmitting a DSSS signal during the NAV period based on the monitoring.
    • 描述了用于选择性地实现WLAN中的传统保护的方法,系统和设备。 方法可以包括由接入点接收来自站的DSSS信号,以及至少部分地基于所接收的DSSS信号来激活接入点的WI_AN内的传统保护。 例如,当不能最初检测到站时,接入点可以发送指示与远程站初始访问周期相关联的NAV周期的OFDM信号。 接入点然后可以在远程站初始访问期间从远程站接收DSSS传输。 一种方法可以包括在无线站处接收与远程站初始接入相关联的NAV周期的指示,在NAV周期期间监视无线电传输,以及基于监视在NAV周期期间发送DSSS信号。