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    • 21. 发明申请
    • Method for Dynamic Resource Allocation in Centrailized Base Stations
    • 中央基站动态资源配置方法
    • US20080134194A1
    • 2008-06-05
    • US11573664
    • 2004-08-13
    • Sheng Liu
    • Sheng Liu
    • G06F9/50
    • H04W16/04H04W28/08H04W72/04H04W88/085
    • A method for realizing dynamic allocation of channel processing resources and load balancing in a centralized base station is disclosed, said centralized base station comprising a plurality of channel processing units independent of each other and remote radio frequency units connected to said channel processing units. The method comprises: dividing a plurality of cells under control of said centralized base station into a plurality of cell groups that are geographically adjacent and are centralized in the same regions different channel processing units performing channel processing of corresponding cell groups, respectively, wherein the channel processing units which are responsible for processing geographically adjacent cell groups are an adjacent channel processing unit for each other; determining a processing load amount of the respective channel processing units and traffic of the respective cells; and adaptively adjusting the cell groups for which the respective channel processing units are responsible for performing channel processing based on the determined processing load amount of the respective channel processing units and the determined traffic of the relevant cells, thereby balancing processing loads of the respective channel processing units. The method can effectively utilize the channel processing resources.
    • 公开了一种在集中式基站中实现信道处理资源的动态分配和负载平衡的方法,所述集中式基站包括彼此独立的多个信道处理单元和连接到所述信道处理单元的远程射频单元。 该方法包括:在所述集中基站的控制下将多个小区划分成地理上相邻的多个小区组,并分别集中在相同的区域中,分别对相应小区组进行信道处理的不同的信道处理单元,其中, 负责处理地理上相邻的小区组的处理单元是彼此相邻的信道处理单元; 确定各个信道处理单元的处理负载量和各个小区的业务量; 并且基于所确定的各个信道处理单元的处理负荷量和确定的相关小区的流量,自适应地调整各个信道处理单元负责执行信道处理的小区组,从而平衡各个信道处理的处理负载 单位。 该方法可以有效利用信道处理资源。
    • 22. 发明授权
    • Estimation method of flat fading channel in CDMA communication system and apparatus for the same
    • CDMA通信系统中平坦衰落信道的估计方法及其设备
    • US07277472B2
    • 2007-10-02
    • US10474192
    • 2001-04-16
    • Gang LiYu JinSheng Liu
    • Gang LiYu JinSheng Liu
    • H04B1/69
    • H04L25/025H04B1/71057H04B1/7117H04L25/0212H04L25/03178
    • The invention provides a method and apparatus for estimating flat fading channel in CDMA communication system, said method is implemented by using an adaptive forward prediction technique based on lattice filter and maximum likelihood technique of Viterbi algorithm. The adaptive lattice filter is used to carry out prediction of LS criteria on channel fading, and a maximum likelihood detection technique completes Viterbi algorithm in accordance with a channel fading value obtained by the prediction, thus obtaining final estimation and decision about the transmitting signals. The present invention has the advantages that it can obtain accurate result for channel estimation and sequence decision when it operates in the fast fading channel, and overcome fast fading influence due to motion speed up of mobile station, thereby satisfying mobile station speed and corresponding receiving performance required in 3G mobile communication.
    • 本发明提供了一种用于估计CDMA通信系统中的平坦衰落信道的方法和装置,所述方法通过使用基于维特比算法的网格滤波器和最大似然技术的自适应前向预测技术来实现。 自适应网格滤波器用于对信道衰落的LS标准进行预测,最大似然检测技术根据通过预测获得的信道衰落值完成维特比算法,从而获得关于发送信号的最终估计和决策。 本发明的优点在于它可以在快速衰落信道中操作时获得信道估计和序列确定的准确结果,并克服移动台运动加速引起的快速衰落影响,从而满足移动台速度和相应的接收性能 需要3G移动通信。
    • 23. 发明申请
    • Method and system of signal transmission in base transceiver station based on remote radio head
    • 基站收发台基于远程无线电头的信号传输方法与系统
    • US20070195832A1
    • 2007-08-23
    • US11547699
    • 2004-04-09
    • Sheng Liu
    • Sheng Liu
    • H04J3/02
    • H04J3/1617H04J3/1658H04J2203/0035H04W88/08H04W92/10
    • The invention relates to a method of signal transmission between a host BTS and Remote Radio Unit(s), and the BTS communication system thereof. The transmission channel between the host BTS and the Remote Radio Unit(s) uses wideband transmission links or a network, the method includes the following steps of: performing the transmission over the transmission channel using a Synchronous Digital Hierarchy (SDH)/Optical Transmission Network (OTN), forming a digital wireless signal data stream and an in-band control signaling stream transmitted over the transmission channel into a Generic Framing Procedure (GFP) frame which is further mapped to a STM-N/OTM-n frame, thereby multiplexing the digital wireless signal data stream and the in-band control signaling stream to realize SDH/OTN-based transmission. As a result, the wireless signal can be effectively transmitted between the RRH and the host BTS without specific transmission network, and the management and maintenance operation required by the signal transmission and the networking cost can be reduced.
    • 本发明涉及一种主机BTS和远程无线电单元之间的信号传输方法及其BTS通信系统。 主机BTS和远程无线电单元之间的传输通道使用宽带传输链路或网络,该方法包括以下步骤:使用同步数字体系(SDH)/光传输网络在传输信道上执行传输 (OTN),形成数字无线信号数据流和通过传输信道传输的带内控制信令流,进一步映射到STM-N / OTM-n帧的通用成帧过程(GFP)帧,由此复用 数字无线信号数据流和带内控制信令流,实现基于SDH / OTN的传输。 结果,可以在RRH和主机BTS之间有效地传输无线信号,而无需特定的传输网络,可以减少信号传输所需的管理和维护操作以及联网成本。
    • 26. 发明授权
    • Short pitch metal gratings and methods for making the same
    • 短节距金属光栅及其制作方法
    • US08506827B2
    • 2013-08-13
    • US12563824
    • 2009-09-21
    • Qihong WuSheng LiuXu ZhangShiaw-wen TaiXiaohua DuThomas Tombler
    • Qihong WuSheng LiuXu ZhangShiaw-wen TaiXiaohua DuThomas Tombler
    • C23F1/02
    • G02B5/3058
    • Methods for forming a metal grating include providing a first grating including a plurality of grating lines formed from a dielectric material, each grating having a pair of sidewalls, facing sidewalls of adjacent grating lines being separated by corresponding trenches, the grating lines and trenches forming a grating surface; forming a layer of a metal on the grating surface, where the metal layer has a constant thickness and conforms to the grating surface; and removing portions of the metal layer between sidewalls of adjacent grating lines of the first grating to form a metal grating having grating lines formed from the metal, the grating lines of the metal grating corresponding to the portions of the metal layer adjacent the sidewalls of the grating lines of the first grating. The metal grating has a pitch of 200 nm or less, a depth of 50 nm or more, and the grating lines of the metal grating have an aspect ratio of 10-to-1 or more.
    • 用于形成金属光栅的方法包括提供包括由电介质材料形成的多个格栅线的第一光栅,每个光栅具有一对侧壁,其相对的光栅线的侧壁由相应的沟槽分开,所述光栅线和沟槽形成 光栅表面; 在光栅表面上形成金属层,其中金属层具有恒定的厚度并符合光栅表面; 以及去除所述第一光栅的相邻光栅线的侧壁之间的所述金属层的部分以形成具有由所述金属形成的光栅线的金属光栅,所述金属光栅的光栅线对应于邻近所述金属层的侧壁的所述金属层的所述部分 第一光栅的光栅线。 金属光栅的间距为200nm以下,深度为50nm以上,金属光栅的光栅线的纵横比为10比1以上。
    • 30. 发明申请
    • 3-Dimensional electro-optical see-through displays
    • 三维电光透视显示屏
    • US20110075257A1
    • 2011-03-31
    • US12807868
    • 2010-09-14
    • Hong HuaSheng Liu
    • Hong HuaSheng Liu
    • G02B27/01G02B27/22
    • G02B27/0172G02B26/004G02B27/017G02B27/2228G02B2027/0127G02B2027/0132G02B2027/0134G02B2027/014G02B2027/0145G02B2027/0147G02B2027/0187G06T19/006H04N13/322H04N13/344H04N13/383
    • An exemplary display is placed in an optical pathway extending from an entrance pupil of a person's eye to a real-world scene beyond the eye. The display includes at least one 2-D added-image source that is addressable to produce a light pattern corresponding to a virtual object. The source is situated to direct the light pattern toward the person's eye to superimpose the virtual object on an image of the real-world scene as perceived by the eye via the optical pathway. An active-optical element is situated between the eye and the added-image source at a location that is optically conjugate to the entrance pupil and at which the active-optical element forms an intermediate image of the light pattern from the added-image source. The active-optical element has variable optical power and is addressable to change its optical power to produce a corresponding change in perceived distance at which the intermediate image is formed, as an added image to the real-world scene, relative to the eye.
    • 示例性显示被放置在从人的眼睛的入射光瞳延伸到超过眼睛的现实世界场景的光学路径中。 显示器包括至少一个可寻址以产生对应于虚拟对象的光图案的2-D加法图像源。 源被定位成将光图案引向人的眼睛,以将虚拟物体叠加在眼睛通过光学路径感知的真实世界场景的图像上。 主动光学元件位于与入射光瞳光学共轭的位置处的眼睛和附加图像源之间,并且主动光学元件在该位置处形成来自附加图像源的光图案的中间图像。 有源光学元件具有可变光功率,并且可寻址以改变其光功率,以产生相对于眼睛作为到现实世界场景的添加图像而形成中间图像的感知距离的相应变化。