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    • 33. 发明授权
    • Measuring noise power at wireless receivers using pilot symbol information
    • 使用导频符号信息测量无线接收机的噪声功率
    • US08223826B2
    • 2012-07-17
    • US12944587
    • 2010-11-11
    • Djordje TujkovicYing XiaRobert LorenzSriram Mudulodu
    • Djordje TujkovicYing XiaRobert LorenzSriram Mudulodu
    • H04B3/46H04B17/00H04Q1/20
    • H04B17/345H04B17/26H04B2201/70701H04L25/0224H04L2025/03414H04L2025/03426
    • Embodiments are directed to a wireless receiver system that utilizes a special structure of pilot symbols used for synchronization and channel estimation in transmission packets to measure noise power at the receiver. The periodicity of the pilot signal sequences is used to extract the noise power from the received signal. Such extraction is achieved by subtracting the received signals from two pilot slots which are separated by the known periodicity of the training sequence. This method relies on the fact that desired signal and system interference signals will cancel out after the subtraction process. Measuring the power of the residual signal after subtraction represents the estimate of the noise power. Several consecutive such residual signals can be first summed up before measuring the power to improve the estimate of the noise power at the receiver. To further improve the performance, estimates of the desired signal produced by a channel estimation block can be first subtracted from each of the received signals on two pilot slots which are then to be subtracted and are separated by the known periodicity of the pilot sequence.
    • 实施例涉及一种无线接收机系统,其利用用于传输分组中的同步和信道估计的导频符号的特殊结构来测量接收机处的噪声功率。 导频信号序列的周期性用于从接收信号中提取噪声功率。 通过从由训练序列的已知周期分隔的两个导频时隙中减去接收到的信号来实现这种提取。 该方法依赖于在减法处理之后所期望的信号和系统干扰信号将被抵消的事实。 减去后测量残留信号的功率表示噪声功率的估计。 在测量功率之前可以首先总结几个连续的这样的残余信号,以改善接收机噪声功率的估计。 为了进一步提高性能,可以首先从两个导频时隙上的每个接收信号中减去由信道估计块产生的期望信号的估计值,然后被减去并且被导频序列的已知周期分隔。
    • 38. 发明申请
    • Temperature estimation based on a signal oscillation
    • 基于信号振荡的温度估计
    • US20070097718A1
    • 2007-05-03
    • US11260885
    • 2005-10-27
    • Anusheel NaharRobert Lorenz
    • Anusheel NaharRobert Lorenz
    • H02J1/10
    • H02M1/32G01K7/425
    • A method of estimating a temperature at a component of a device is provided. The temperature may be used to provide thermal load management of the device. In an exemplary embodiment, a switched mode power converter includes a power converter module and a switch that controls a switching cycle of the power converter module. A signal includes a bus voltage component and an oscillating signal component at least partially caused by switching of the switch. A switch instant of the switch can be isolated. A characteristic of the oscillating signal component of the signal can be detected. For example, a first peak voltage of the oscillating signal component can be detected after the switch instant. The temperature of the power converter module is estimated using the detected characteristic of the oscillating signal component. For example, the temperature can be estimated using the first peak voltage and best-fit curve parameters in solving a linear or a quadratic equation.
    • 提供了一种估计器件部件温度的方法。 温度可用于提供设备的热负载管理。 在示例性实施例中,开关模式功率转换器包括功率转换器模块和控制功率转换器模块的开关周期的开关。 信号包括至少部分地由开关的切换部分引起的总线电压分量和振荡信号分量。 可以隔离开关的开关瞬间。 可以检测信号的振荡信号分量的特性。 例如,可以在切换瞬间之后检测振荡信号分量的第一峰值电压。 使用检测到的振荡信号分量的特性来估计功率转换器模块的温度。 例如,可以使用第一峰值电压和最佳拟合曲线参数来求解线性或二次方程来估计温度。
    • 39. 发明申请
    • Vertically stacked turnstile array
    • 垂直堆叠的旋转门阵列
    • US20050088337A1
    • 2005-04-28
    • US10992950
    • 2004-11-22
    • Robert Lorenz
    • Robert Lorenz
    • G01S19/25H04B7/08G01S5/14G01S3/16
    • H04B7/0822H04B7/0808H04B7/0854H04B7/0874
    • A system includes an antenna array consisting of a plurality of antenna elements, a plurality of receivers to process the signals from the antenna elements of the antenna array, and a combiner to combine receiver outputs so as to minimize the effect of undesirable signals such as multipath or interference while maintaining a nominal gain in the direction of the desired signal. The combiner takes into account variation or uncertainty in the assumed antenna array response, such as imprecise knowledge of the angle of arrival and uncertainty in the array manifold and multiplicative uncertainties due to gain variations between receivers, as well as non-uniformity in the response due to coupling between elements and coupling with the antenna structure. This system is applicable to antenna arrays with non-uniform responses, such as closely spaced arrays in which the coupling between elements is significant.
    • 一种系统包括由多个天线元件组成的天线阵列,用于处理来自天线阵列的天线元件的信号的多个接收器以及组合器,以组合接收器输出,以便最小化诸如多径的不需要的信号的影响 或干扰,同时在所需信号的方向上保持标称增益。 组合器考虑了假定的天线阵列响应的变化或不确定性,例如由于接收机之间的增益变化引起的到达角度和阵列歧管中的不确定性的不精确知识以及乘法不确定性以及响应中的不均匀性 以耦合元件并与天线结构耦合。 该系统适用于具有非均匀响应的天线阵列,例如紧密间隔的阵列,其中元件之间的耦合是重要的。