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    • 1. 发明申请
    • AUTONOMOUS MAXIMUM POWER SETTING BASED ON CHANNEL FINGERPRINT
    • 基于通道指纹的自动最大功率设置
    • US20130039194A1
    • 2013-02-14
    • US13384854
    • 2011-12-28
    • Iana SiominaMuhammad KazmiGary Boudreau
    • Iana SiominaMuhammad KazmiGary Boudreau
    • H04W52/04H04W24/00
    • H04W52/244
    • A home base station (HBS) (104, 801) performs radio channel measurements to detect one or more user equipments (UEs) (107) not served by the HBS which may be in a potentially interfering environment caused at least in part by the HBS. A database (812) of historical channel data (channel fingerprinting) of the HBS coverage area is used to predict the channel conditions and expected interference signal power seen by the detected UE(s). Based on a combination of the radio measurements (813) and historical channel data, the HBS can accurately and adaptively reduce its transmit power to a level that reduces or eliminates interference with the detected UE(s), while also not significantly degrading communication quality between other UEs served by the HBS.
    • 家庭基站(HBS)(104,801)执行无线电信道测量以检测不由HBS服务的一个或多个用户设备(107),所述HBS可能至少部分地由HBS引起潜在的干扰环境 。 使用HBS覆盖区域的历史信道数据(信道指纹)的数据库(812)来预测检测到的UE看到的信道状况和预期的干扰信号功率。 基于无线电测量(813)和历史信道数据的组合,HBS可以将其发射功率精确和自适应地降低到降低或消除对所检测到的UE的干扰的水平,同时也不会显着降低 由HBS服务的其他UE。
    • 6. 发明授权
    • Multi-OFDM-protocol beacon operation
    • US10862723B2
    • 2020-12-08
    • US16318625
    • 2016-08-30
    • Gary BoudreauHassan HalabianRoland Smith
    • Gary BoudreauHassan HalabianRoland Smith
    • H04L27/26H04L5/00H04L27/00H04W16/14
    • Methods and systems for multi-protocol beacon operation in shared spectrum (unlicensed band) are disclosed where an OFDM transmitter is configured to generate transmissions associated with one OFDM technology or protocol using subcarriers of another OFDM technology. In one application, an LTE transmitter (LTE-U) uses LTE subcarriers to generate an interpolated 802.11 (e.g. Wi-Fi) beacon transmission that can be understood by Wi-Fi receivers, for example to reserve the channel for a subsequent LTE transmission. For instance a W-LAN preamble is generated where STF and LTF fields consist in respectively 12 and 52 subcarriers mapped at their respective frequency locations among the 2048 LTE subcarriers with the remaining subcarriers set to 0. In some implementations, the use of beacons can be useful in implementations where it is desirable to gain prioritized access to reserve the channel. Examples of suitable LTE transmissions that would benefit from prioritized channel access include delay or time-sensitive LTE transmissions or transmissions that must occur within a certain time window and/or with a certain periodicity such as LTE control data or signals (e.g. PDCCH), and/or synchronization or reference signals such as the Discovery Reference Signal (DRS) for LAA-LTE). An LTE transmitter can exploit the 802.11 channel access to gain prioritized channel access for transmitting 802.11 Wi-Fi beacons generated using its LTE subcarriers to ensure LTE transmissions take priority over other types of LTE and/or Wi-Fi traffic.
    • 10. 发明授权
    • Reduced complexity channel estimation for uplink receiver
    • 减少上行链路接收机的复杂度信道估计
    • US08861569B2
    • 2014-10-14
    • US13620736
    • 2012-09-15
    • John P. PanickerGary BoudreauMichael PetrasEd Illidge
    • John P. PanickerGary BoudreauMichael PetrasEd Illidge
    • H04L25/02
    • H04L25/0256H04L25/0204H04L25/022H04L25/0232
    • The present invention proposes an LTE eNodeB receiver channel estimation technique that is referred to as reduced complexity minimum mean squared error (MMSE) technique for channel estimation. From the invention's assumptions, estimations and modified calculations, the present invention generates precise channel estimates of RS using the reduced complexity MMSE matrix and previously computed LS channel estimates HLS is as follows: (Formula I) which generates precise channel estimates of RS using the reduced complexity MMSE matrix and previously computed LS channel estimates. As a second aspect of the present invention, it is desired that the SNR be estimated within −3 dB of the actual channel SNR. As a third aspect of the invention, an adaptive method of data channel interpolation from RS channel is being proposed in this invention.
    • 本发明提出了LTE eNodeB接收机信道估计技术,其被称为降低复杂度的最小均方误差(MMSE)技术用于信道估计。 根据本发明的假设,估计和修改的计算,本发明使用降低的复杂度MMSE矩阵生成RS的精确信道估计,并且先前计算的LS信道估计HLS如下:(式I),其使用缩减的 复杂MMSE矩阵和先前计算的LS信道估计。 作为本发明的第二方面,期望将SNR估计在实际信道SNR的-3dB内。 作为本发明的第三方面,在本发明中提出了一种来自RS信道的数据信道插值的自适应方法。