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    • 2. 发明授权
    • Wireless receiver and its demodulating method
    • 无线接收机及其解调方法
    • US07650131B2
    • 2010-01-19
    • US11688723
    • 2007-03-20
    • Shingo YoshizawaYoshikazu MiyanagaMasaki Hirata
    • Shingo YoshizawaYoshikazu MiyanagaMasaki Hirata
    • H04B1/10H04B1/00
    • H04L27/2649H04L25/0202H04L2025/03414
    • A wireless receiver which is used for a digital signal transmission system to wirelessly transmit a digital signal by packetizing and modifying it, selectively sets the shortest arithmetical bit length satisfying a required communication quality when performs demodulation arithmetical processing to demodulate a digital signal to be packet-transmitted, inputs a demodulation arithmetical result by the arithmetical bit length to calculate an error vector magnitude value that is a measure indicating a difference between the arithmetical result and a known ideal result, predicts a bit error rate by using the EVM value as an evaluation criterion, selects an arithmetical bit length by which the bit error rate becomes optimum, and executes the demodulating arithmetical processing by the selected arithmetical bit length.
    • 一种用于数字信号传输系统的无线接收机,通过分组和修改数字信号来无线传输数字信号,当进行解调算术处理以解调数字信号以进行分组处理时,有选择地设置满足所需通信质量的最短算术位长度, 通过算术位长度输入解调算术结果,计算作为指示算术结果与已知理想结果之间的差异的度量的误差向量幅值,通过使用EVM值作为评估标准来预测误码率 选择比特误码率最优的算术比特长度,并通过选择的算术比特长度执行解调算术处理。
    • 4. 发明授权
    • Diagnostic method and apparatus for gas sensor
    • 气体传感器的诊断方法和装置
    • US07596993B2
    • 2009-10-06
    • US12283440
    • 2008-09-12
    • Reina FukagaiNorikazu IedaMasahiro TanakaHiroshi InagakiMasaki HirataTakahiro Suzuki
    • Reina FukagaiNorikazu IedaMasahiro TanakaHiroshi InagakiMasaki HirataTakahiro Suzuki
    • G01M15/04
    • F02D41/1474F02D41/1456F02D41/1494F02D41/1495F02D2041/1432G01N27/4175
    • A gas sensor diagnostic method includes the steps of counting the reversal number of times that a target air-fuel ratio for an air-fuel mixture to be supplied to an internal combustion engine reverses from a rich side to a lean side or from the lean side to the rich side through a specific air-fuel ratio defined as a boundary of the rich and lean sides; obtaining a detection signal of gas sensor at constant time intervals during a diagnosis period between a timing when the count for the reversal number is started and a timing when the reversal number reaches a predetermined number; calculating a first moderated signal by applying a first moderation calculation to the detection signal, and a second moderated signal by applying a second moderation calculation to the detection signal; calculating a deviation between the first and second moderated signals; and determining whether the gas sensor is in the abnormal state on the basis of the deviation obtained during the diagnosis period.
    • 气体传感器诊断方法包括以下步骤:计算供给内燃机的空气燃料混合物的目标空燃比从富侧向稀侧反转的倾倒次数 通过定义为富边和贫边的边界的特定空燃比向富地提供; 在开始反转次数的定时与反转次数达到预定次数的定时之间的诊断期间,以恒定的时间间隔获取气体传感器的检测信号; 通过对所述检测信号应用第一审核计算来计算第一调节信号,以及通过对所述检测信号应用第二审核计算来计算第二调节信号; 计算第一和第二调节信号之间的偏差; 并基于在诊断期间获得的偏差来确定气体传感器是否处于异常状态。