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    • 2. 发明申请
    • Filter coefficient calculation method and filter coefficient calculation unit
    • 滤波系数计算方法和滤波系数计算单位
    • US20100138466A1
    • 2010-06-03
    • US12591642
    • 2009-11-25
    • Ryoji YanaseTakeshi TakanashiKoichiro Suzuki
    • Ryoji YanaseTakeshi TakanashiKoichiro Suzuki
    • G06F17/10
    • G06T5/20G06T5/003G06T2207/10016
    • Provided is a filter coefficient calculation method that calculates filter functions, each having (2n+1) rows and (2n+1) columns (n is an integer), the method including calculating a first filter function in accordance with a set value that is externally input, calculating an error between a total sum of values included in the first filter function and an ideal value of the total sum, supplying an odd error included in the error to a first origin coefficient that is located at a center of the first filter function as a first correction value if the error is an odd number, and supplying an even error to one of the first origin coefficient and a coefficient pair that is located symmetrically with respect to a point of the first origin coefficient as a second correction value, the even error being the error except the odd error.
    • 提供了一种滤波器系数计算方法,其计算每个具有(2n + 1)行和(2n + 1)列(n为整数)的滤波器功能,所述方法包括根据设定值计算第一滤波器函数 计算包括在第一滤波器功能中的值的总和与总和的理想值之间的误差,将包含在该误差中的奇数误差提供给位于第一滤波器的中心的第一原点系数 作为第一校正值,如果误差是奇数,并且将第一原始系数和对应于第一原始系数的点对称的系数对之一提供均匀误差作为第二校正值, 偶数误差除了奇数误差之外的误差。
    • 5. 发明授权
    • Radar with non-uniformly spaced antenna array
    • 具有不均匀间隔的天线阵列的雷达
    • US08144049B2
    • 2012-03-27
    • US12509655
    • 2009-07-27
    • Akiyoshi MizutaniKoichiro Suzuki
    • Akiyoshi MizutaniKoichiro Suzuki
    • G01S13/00G01S13/93
    • H01Q3/24G01S3/74G01S13/345G01S13/931G01S2013/9375H01Q21/22
    • In a radar with a non-uniformly spaced antenna array, an extractor estimates a number of arrivals of echoes to the antenna array. A setter sets a number of azimuths corresponding to a number of extracted peaks as a number of tested azimuths greater than the number of arrivals of echoes by a preset number. A determiner determines a level of correlations among steering vectors respectively corresponding to the tested azimuths. A selector selects, from the tested azimuths, azimuths as power-estimation targets based on the determined level of the correlations among the steering vectors. A first estimator estimates a received power level from each power-estimation target. A second estimator estimates, from the power-estimation targets, an azimuth of the target based on the estimated received power level from each power-estimation target. The estimated received power level from the azimuth is equal to or greater than a preset threshold level.
    • 在具有不均匀间隔的天线阵列的雷达中,提取器估计到天线阵列的回波的到达数量。 设定器将与提取的峰值数相对应的方位数设定为大于回波的到达数量预先设定的数量的被测方位角。 确定器确定分别对应于测试方位角的导向矢量之间的相关性水平。 选择器根据确定的导向矢量之间的相关性水平,从测试的方位角中选择方位角作为功率估计目标。 第一估计器估计来自每个功率估计目标的接收功率电平。 第二估计器基于来自每个功率估计目标的估计的接收功率电平,从功率估计目标估计目标的方位角。 来自方位角的估计接收功率电平等于或大于预设阈值电平。