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22 条记录 (耗时 0.01 秒)

    CHANNEL ADAPTATION USING VARIABLE SOUNDING SIGNAL RATES
    4.
    发明公开
    CHANNEL ADAPTATION USING VARIABLE SOUNDING SIGNAL RATES 有权
    使用信道测量的基准信号与可变速率的信道适配

    公开(公告)号：EP1719315A1

    公开(公告)日：2006-11-08

    申请号：EP05726380.8

    申请日：2005-01-14

    申请人： Intel Corporation

    发明人： JACOBSEN, Eric ,  AZIZI, Shahrnaz

    IPC分类号： H04L27/26

    CPC分类号： H04L1/20 ,  H04L1/0001 ,  H04L25/0216 ,  H04L25/0226 ,  H04L27/2613

    摘要： Systems, devices and methods for updating link adaptations in multi-carrier modulated signals between an access point (AP) and a wireless local area network (WLAN) station (STA) include (are configured for) periodically transmitting a channel sounding signal from the AP. The STA receives each unsolicited channel sounding signal and evaluates the current channel conditions between the AP and STA. The AP adjusts a rate of transmission of the channel sounding signals in accordance with the channel coherence time so that the channel estimates performed by the STA will be valid within the time varying characteristics of the channel. Depending on the length of the coherence time for network environment, the channel sounding signals may be AP beacons, low overhead signal fragments with no payload, or a combination of both.

    PILOT AIDED CLOCK SYNCHRONIZATION FOR OFDM SIGNALS
    6.
    发明公开
    PILOT AIDED CLOCK SYNCHRONIZATION FOR OFDM SIGNALS 有权
    导频辅助时钟同步FOR OFDM信号

    公开(公告)号：EP1421756A2

    公开(公告)日：2004-05-26

    申请号：EP02750393.7

    申请日：2002-08-02

    申请人： INTEL CORPORATION

    发明人： JACOBSEN, Eric

    IPC分类号： H04L27/26

    CPC分类号： H04L27/2662 ,  H04L27/2607 ,  H04L27/2626 ,  H04L27/265 ,  H04L27/2672 ,  H04L27/2679

    摘要： A technique includes receiving a signal that indicates a modulated symbol (52) during a given time slice of the signal. Sliding window frequency transformations of the signal are performed, and each sliding window (60) transformation is associated with a different time interval of the signal. One of the time intervals is selected to correspond to the time slice. The result of the frequency transformation associated with the selected time interval is used to obtain an indication of the demodulated symbol.

    FORWARD ERROR CORRECTION CODING IN COMMUNICATION NETWORKS
    9.
    发明公开
    FORWARD ERROR CORRECTION CODING IN COMMUNICATION NETWORKS 审中-公开
    通信网络中前向纠错编码

    公开(公告)号：EP1692803A2

    公开(公告)日：2006-08-23

    申请号：EP04820018.2

    申请日：2004-11-10

    申请人： INTEL CORPORATION

    发明人： JACOBSEN, Eric ,  SADOWSKY, John

    IPC分类号： H04L1/00 ,  H04L27/26 ,  H04L1/18

    CPC分类号： H04L1/005 ,  H04L1/0041 ,  H04L1/0057 ,  H04L27/2602

    摘要： Methods, apparatus and systems are disclosed for block encoding/decoding information wireless networks having narrow decoding latency restrictions. A method includes identifying a length of information to be sent in a block code and encoding the information to be sent in the block code into one or more codewords, where the number of codewords and the amount of information encoded within each codeword is adjusted based on the identified length and to achieve a similar codeword error probability for each codeword considering available decoding time for decoding a last codeword is less than available decoding time for decoding a first codeword. In certain implementations low density parity check (LDPC) encoding may be used in combination with OFDM to provide reliable communications in a high throughput WLAN.