会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明申请
    • ROBUST PREAMBLE FOR COMMUNICATION OVER NOISY MEDIA
    • 可靠的前缀,用于通信噪声媒体
    • WO2012025234A1
    • 2012-03-01
    • PCT/EP2011/004262
    • 2011-08-25
    • LANTIQ DEUTSCHLAND GMBHOKSMAN, VladimirKIM, Joon BaeSANDBERG, Stuart
    • OKSMAN, VladimirKIM, Joon BaeSANDBERG, Stuart
    • H04L27/26
    • H04L27/2613H04L27/2656H04L27/2657H04L27/2692H04L69/22
    • Described herein are techniques related to data communications using a data packet having at least one frame with a preamble for use over media having a high degree of non-stationary noise (e.g., impulsive noise). The described techniques employ a preamble with a structure having multiple transitions between the preamble sections. Each transition indicates the start of the upcoming frame. With the techniques described herein, if noise damages the transitions between such sections beyond recognition, the receiver can still determine the frame start time from the one or more of the undamaged transitions. Thus, the robustness of communications via the noisy media is significantly increased. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
    • 这里描述了与使用具有至少一个帧的数据分组的数据分组相关的数据通信的技术,前导码用于具有高度非平稳噪声(例如脉冲噪声)的介质。 所描述的技术采用具有在前导码部分之间具有多个转换的结构的前同步码。 每个转换指示即将到来的帧的开始。 利用本文描述的技术,如果噪声破坏了这些部分之间的转换超过识别,则接收机仍然可以从一个或多个未损坏的转变确定帧开始时间。 因此,通过噪声介质的通信的鲁棒性显着增加。 提交本摘要的理解是,它不会用于解释或限制权利要求的范围或含义。
    • 4. 发明申请
    • TRANSMIT PSD CEILING IN PACKET-BASED OFDM SYSTEMS
    • 在基于分组的OFDM系统中发送PSD天花板
    • WO2010027768A3
    • 2010-10-14
    • PCT/US2009054849
    • 2009-08-25
    • AWARE INCKIM JOON BAETZANNES MARCOS THELLER PETER NIELSSANDBERG STUART
    • KIM JOON BAETZANNES MARCOS THELLER PETER NIELSSANDBERG STUART
    • H04L5/00
    • H04L5/0091H04L5/0007H04L5/0037H04L5/006
    • Adjusted maximum transmit PSD levels have an effect on the SNR. If the ADC noise is assumed to be the limiting factor, then there can be a benefit for reducing the maximum transmit PSD level. For example, by lowering the maximum transmit PSD level from -50 dBm/Hz to -70 dBm/Hz results in an increase in SNR for subcarriers above 30 M Hz. The SNR for su bcarriers above 30 MHz can increase from 30db (-80-(-11O)) to 50db (-80-(-13O)). Therefore, by changing the maximum transmit PSD level, applying a ceiling on PSD mask, the aggregate sum of the available SNR's over the available subcarriers is increased, therefore increasing the obtainable OFDM data rate. In other words, a maximum transmit PSD mask can be used to lower the transmit PSD value of at least one subcarrier which results in an increase in SNR for at least one subcarrier.
    • 调整后的最大发射PSD电平对SNR有影响。 如果ADC噪声被认为是限制因素,那么降低最大传输PSD电平可能会有好处。 例如,通过将最大发射PSD电平从-50 dBm / Hz降至-70 dBm / Hz,会导致30 M Hz以上子载波的SNR增加。 30MHz以上的载波的SNR可以从30db(-80 - ( - 110))增加到50db(-80 - ( - 130))。 因此,通过改变最大传输PSD电平,对PSD掩模应用上限,增加可用子载波上可用SNR的总和,从而增加可获得的OFDM数据速率。 换句话说,可以使用最大传输PSD掩模来降低至少一个副载波的传输PSD值,这导致至少一个副载波的SNR增加。