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    • 52. 发明授权
    • Method and apparatus for MIMO repeater chains in a wireless communication network
    • 无线通信网络中MIMO中继链的方法和装置
    • US08472868B2
    • 2013-06-25
    • US12639169
    • 2009-12-16
    • Fenghao MuStefan Andersson
    • Fenghao MuStefan Andersson
    • H04B3/36
    • H04B7/15521
    • In one or more embodiments taught herein, a multi-band MIMO repeater is configured to translate normal wireless mobile bands into other frequency bands in the physical layer. An advantageous, multi-hop repeater chain includes two or more such repeaters, for propagating downlink signals from a base station, and for propagating uplink signals to the base station. Each such repeater may use paralleled homodyne structure transceivers for better SNR, spectrum combiners for uplink signal aggregation, spectrum separators for downlink signal de-aggregation, water mark signal inserters for optimization, and, among other things, spectrum analyzers for frequency band selection. In at least one such embodiment, a multi-hop repeater chain is configured for MIMO operation in an LTE Advanced or other MIMO network, to deliver high data rate over larger distances—e.g., further away from cell base stations.
    • 在本文教导的一个或多个实施例中,多频带MIMO中继器被配置为将正常的无线移动频带转换成物理层中的其他频带。 有利的多跳中继链包括两个或更多个这样的中继器,用于从基站传播下行链路信号,以及用于将上行链路信号传播到基站。 每个这样的中继器可以使用并行的零差结构收发器来获得更好的SNR,用于上行链路信号聚合的频谱组合器,用于下行链路信号去聚合的频谱分离器,用于优化的水印信号插入器,以及用于频带选择的频谱分析器。 在至少一个这样的实施例中,多跳中继链被配置用于LTE高级或其他MIMO网络中的MIMO操作,以在更远的距离(例如远离小区基站)提供高数据速率。
    • 53. 发明申请
    • Down-Conversion using Square Wave Local Oscillator Signals
    • 使用方波局部振荡器信号进行下变频
    • US20120313672A1
    • 2012-12-13
    • US13576827
    • 2011-02-14
    • Stefan AnderssonFredrik TillmanImad Ud DinDaniel Eckerbert
    • Stefan AnderssonFredrik TillmanImad Ud DinDaniel Eckerbert
    • H03B19/00
    • H03D7/165H03D7/18H03D2200/0086
    • In a method of frequency down-converting an input signal to an output signal, a first local oscillator signal is generated as a square wave having a duty cycle of 1/3 or 2/3, and the input signal is mixed with the first oscillator signal to achieve a first down-converted signal, A second local oscillator signal is generated as a modified square wave having the same period time and a duty cycle of 2/3, of which one part has a positive amplitude and another part has a negative amplitude. The input signal is mixed with the second oscillator signal to achieve a second down-converted signal. The first oscillator signal has a delay of 1/4 of the period time to achieve a phase shift of π/2 between the oscillator signals, and at least one down-converted signal is multiplied by a pre-calculated factor. The resulting down-converted signals are added to achieve the output signal.
    • 在将输入信号下变频为输出信号的方法中,产生第一本地振荡器信号作为占空比为1/3或2/3的方波,并且输入信号与第一振荡器 信号以实现第一下变频信号,第二本地振荡器信号被生成为具有相同周期时间和2/3的占空比的修改的方波,其中一个部分具有正幅度,另一部分具有负的 振幅。 输入信号与第二振荡器信号混合以实现第二下变频信号。 第一振荡器信号具有周期时间的1/4的延迟,以实现振荡器信号之间的&pgr / 2的相移,并且至少一个下变频信号乘以预先计算的因子。 所产生的下变频信号被加入以实现输出信号。
    • 57. 发明授权
    • Filter smoothing in multi-channel audio encoding and/or decoding
    • 在多声道音频编码和/或解码中滤波平滑
    • US07945055B2
    • 2011-05-17
    • US11358720
    • 2006-02-22
    • Anisse TalebStefan Andersson
    • Anisse TalebStefan Andersson
    • H04R5/00
    • G10L19/022G10L19/002G10L19/008G10L19/24G10L19/26
    • A first signal representation of one or more of the multiple channels is encoded in a first encoding process, and a second signal representation of one or more of the multiple channels is encoded in a second, filter-based encoding process. Filter smoothing can be used to reduce the effects of coding artifacts. However, conventional filter smoothing generally leads to a rather large performance reduction and is therefore not widely used. It has been recognized that coding artifacts are perceived as more annoying than temporary reduction in stereo width, and that they are especially annoying when the coding filter provides a poor estimate of the target signal; the poorer the estimate, the more disturbing artifacts. Therefore, signal-adaptive filter smoothing is introduced in the second encoding process or a corresponding decoding process.
    • 在第一编码过程中编码多个信道中的一个或多个的第一信号表示,并且在第二个基于过滤器的编码过程中对多个信道中的一个或多个的第二信号表示进行编码。 滤波平滑可用于减少编码伪像的影响。 然而,常规滤波器平滑通常导致相当大的性能降低,并且因此不被广泛使用。 已经认识到,编码伪像被认为比立体声宽度的暂时减少更烦人,并且当编码滤波器提供对目标信号的不良估计时,它们特别烦人; 估计越穷越好的文物。 因此,在第二编码处理或对应的解码处理中引入信号自适应滤波平滑。
    • 59. 发明申请
    • Power Efficient Data Transmission
    • 高效数据传输
    • US20110003609A1
    • 2011-01-06
    • US12633848
    • 2009-12-09
    • Lars SundströmStefan AnderssonBengt LindoffStefan Parkvall
    • Lars SundströmStefan AnderssonBengt LindoffStefan Parkvall
    • H04B7/00
    • H04W52/0206Y02D70/1262Y02D70/1264Y02D70/24Y02D70/25
    • Teachings herein schedule a data transmission in a variable bandwidth wireless communication system based on the power efficiency of a mobile node. One or more processing circuits, of the mobile node or a network node, determine the value of a control setting that defines a power efficiency configuration of the mobile node. In one embodiment, for example, the power efficiency configuration indicates the mobile node is configured to operate at the maximum power efficiency attainable without the data rate of the data transmission falling below a minimum data rate required by a quality of service. Regardless, the one or more processing circuits select from different possible bandwidths of the data transmission a bandwidth that supports a given data rate and that, according to a power efficiency model that models power efficiency of the mobile node for the different possible bandwidths, yields a power efficiency comporting with the power efficiency configuration.
    • 这里的教导是基于移动节点的功率效率来调度可变带宽无线通信系统中的数据传输。 移动节点或网络节点的一个或多个处理电路确定定义移动节点的功率效率配置的控制设置的值。 在一个实施例中,例如,功率效率配置指示移动节点被配置为以可达到的最大功率效率工作,而数据传输的数据速率低于服务质量所要求的最小数据速率。 无论如何,一个或多个处理电路从数据传输的不同可能带宽中选择支持给定数据速率的带宽,并且根据为不同可能带宽建模移动节点的功率效率的功率效率模型,产生一个 功率效率与功率效率配置相匹配。
    • 60. 发明申请
    • Method and Apparatus for MIMO Repeater Chains in a Wireless Communication Network
    • 无线通信网络中MIMO中继链的方法与装置
    • US20100284446A1
    • 2010-11-11
    • US12639169
    • 2009-12-16
    • Fenghao MuStefan Andersson
    • Fenghao MuStefan Andersson
    • H04B3/36
    • H04B7/15521
    • In one or more embodiments taught herein, a multi-band MIMO repeater is configured to translate normal wireless mobile bands into other frequency bands in the physical layer. An advantageous, multi-hop repeater chain includes two or more such repeaters, for propagating downlink signals from a base station, and for propagating uplink signals to the base station. Each such repeater may use paralleled homodyne structure transceivers for better SNR, spectrum combiners for uplink signal aggregation, spectrum separators for downlink signal de-aggregation, water mark signal inserters for optimization, and, among other things, spectrum analyzers for frequency band selection. In at least one such embodiment, a multi-hop repeater chain is configured for MIMO operation in an LTE Advanced or other MIMO network, to deliver high data rate over larger distances—e.g., further away from cell base stations.
    • 在本文教导的一个或多个实施例中,多频带MIMO中继器被配置为将正常的无线移动频带转换成物理层中的其他频带。 有利的多跳中继链包括两个或更多个这样的中继器,用于从基站传播下行链路信号,以及用于将上行链路信号传播到基站。 每个这样的中继器可以使用并行的零差结构收发器来获得更好的SNR,用于上行链路信号聚合的频谱组合器,用于下行链路信号去聚合的频谱分离器,用于优化的水印信号插入器,以及用于频带选择的频谱分析器。 在至少一个这样的实施例中,多跳中继链被配置用于LTE高级或其他MIMO网络中的MIMO操作,以在更远的距离(例如远离小区基站)提供高数据速率。