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公开(公告)号：US10993242B1
公开(公告)日：2021-04-27
申请号：US16538316
申请日：2019-08-12
Applicant: Sprint Communications Company L.P.
Inventor： Yun Sung Kim , Jason Sigg , Sanghoon Sung , Pinal Tailor
Abstract: Methods and systems are provided for dynamic performance of antenna calibration. To ensure channel reciprocity of downlink and uplink channels, antenna calibration must be performed with some degree of regularity. The present disclosure includes systems and methods for performing antenna calibration, wherein noise levels are determined at various subframes of wireless telecommunication frame structures as a basis for determining when the calibration signal should be transmitted in an OFDM symbol. Utilizing the disclosed systems and methods yields preferred antenna calibration, avoiding gain degradations caused by decreases in propagation performance.
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公开(公告)号：US09755723B1
公开(公告)日：2017-09-05
申请号：US14808292
申请日：2015-07-24
Applicant: Sprint Communications Company L.P.
Inventor： Nagi A. Mansour , Pinal Tailor , Aaron Pawlowski
CPC classification number: H04B7/0837 , H04B7/0874 , H04B7/10 , H04W72/046
Abstract: A method, system, and medium are provided for improving uplink performance of an antenna array configured for downlink beam forming. Beam forming requires an antenna element spacing that results in correlated downlink signals. Uplink reception preferably uses an element spacing such that uplink signals are uncorrelated. For an eight-element antenna configured for beam forming, using eight-branch combining to produce a single resultant signal is thus less than optimal. In an embodiment, non-adjacent elements in the antenna array, which receive uncorrelated signals, may be combined in pairs with two-branch combining. The four resultant signals may then be combined using four-branch combining to provide a single resultant signal.
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公开(公告)号：US09124333B1
公开(公告)日：2015-09-01
申请号：US14517444
申请日：2014-10-17
Applicant: SPRINT COMMUNICATIONS COMPANY, L.P.
Inventor： Nagi A. Mansour , Pinal Tailor , Aaron Pawlowski
IPC: H04B7/08
CPC classification number: H04B7/0837 , H04B7/0874 , H04B7/10 , H04W72/046
Abstract: A method, system, and medium are provided for improving uplink performance of an antenna array configured for downlink beam forming. Beam forming requires an antenna element spacing that results in correlated downlink signals. Uplink reception preferably uses an element spacing such that uplink signals are uncorrelated. For an eight-element antenna configured for beam forming, using eight-branch combining to produce a single resultant signal is thus less than optimal. In an embodiment, non-adjacent elements in the antenna array, which receive uncorrelated signals, may be combined in pairs with two-branch combining. The four resultant signals may then be combined using four-branch combining to provide a single resultant signal.
Abstract translation: 提供了一种方法，系统和介质，用于改善配置用于下行链路波束形成的天线阵列的上行链路性能。 波束形成需要导致相关下行链路信号的天线元件间隔。 上行链路接收优选地使用元素间隔，使得上行链路信号是不相关的。 对于配置用于波束成形的八元天线，使用八分支组合产生单个合成信号因此小于最优。 在一个实施例中，天线阵列中接收不相关信号的非相邻元件可以与双分支组合成对组合。 然后可以使用四分支组合来组合四个结果信号以提供单个结果信号。
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