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    • 2. 发明申请
    • EVALUATION METHOD OF RANDOM ERROR DISTRIBUTION AND EVALUATION APPARATUS THEREOF
    • 随机误差分布及其评估装置的评估方法
    • US20090282299A1
    • 2009-11-12
    • US12501647
    • 2009-07-13
    • Masahiro KURODATakashi FURUYAKazuhiko ISHIBE
    • Masahiro KURODATakashi FURUYAKazuhiko ISHIBE
    • G06F11/00
    • H04L1/0084H04L1/20
    • A degree of conformity of error distribution of a digital signal to the Poisson distribution is quantitatively determined. The digital signal including error data, which is randomly generated at a predetermined error rate, is divided into data number of measurement units, wherein the data number is determined on the basis of the error rate. A sample number of the measurement units are acquired from the measurement units, and the number of errors contained in each measurement unit is measured as a measurement value. Further, the number of times of occurrence of each measurement value is calculated, a Poisson distribution function is calculated, and a degree of a bond between the Poisson distribution and the distribution of the number of times of occurrence is determined by using the chi-square goodness-of-fit test method.
    • 定量地确定数字信号的误差分布与泊松分布的一致性程度。 包括以预定错误率随机产生的误差数据的数字信号被划分为测量单位的数据数,其中基于错误率确定数据编号。 从测量单元获取测量单元的样本数,并且测量每个测量单元中包含的误差的数量作为测量值。 此外,计算每个测量值的出现次数,计算泊松分布函数,并且通过使用卡方确定泊松分布与发生次数分布之间的键的程度 适合度测试方法。
    • 3. 发明申请
    • OPU FRAME GENERATING DEVICE AND OPU FRAME TEST DEVICE
    • OPU框架发生装置和OPU框架测试装置
    • US20120257888A1
    • 2012-10-11
    • US13433370
    • 2012-03-29
    • Takashi FURUYATsuyoshi OGAWA
    • Takashi FURUYATsuyoshi OGAWA
    • H04B10/00H04B10/08
    • H04J3/1652H04J3/14H04J2203/0073
    • An OPU frame generating device includes a frequency setting unit that sets a frequency corresponding to a bit rate of data which can be stored in a payload area, a parameter calculating unit that calculates a parameter Cm indicating an integer part of the amount of data included in the payload area using the set frequency, a data inserting unit that outputs a timing signal determined by the parameter Cm and inserts data at a position determined by the parameter Cm in the payload area, a data generating unit that generates data in synchronization with the timing signal, and a frame generating unit that generates an OPU frame having the payload area into which the data is inserted.
    • OPU帧产生装置包括:频率设定单元,其设定与能够存储在有效载荷区域中的数据的比特率对应的频率;参数计算单元,计算表示包含在数据量的数据量的整数部分的参数Cm 使用设定频率的有效负载区域,输出由参数Cm确定的定时信号并在由有效载荷区域中的参数Cm确定的位置插入数据的数据插入单元,与定时同步地生成数据的数据生成单元 信号和帧生成单元,其生成具有插入数据的有效载荷区域的OPU帧。
    • 4. 发明申请
    • RANDOM ERROR SIGNAL GENERATOR
    • 随机错误信号发生器
    • US20100031105A1
    • 2010-02-04
    • US12510423
    • 2009-07-28
    • Takashi FURUYAMasahiro KurodaHiroshi Shimotahira
    • Takashi FURUYAMasahiro KurodaHiroshi Shimotahira
    • G01R31/28G06F11/00
    • G01R31/318371G01R31/31917
    • In a random error signal generator, an M-sequence generation circuit outputs, in parallel, pieces of bit data stored in each register, a first generation circuit sequentially outputs first reference values C which are changed by a predetermined value in response to clocks, a second generation circuit outputs a second reference value D which is shifted from the first reference value C by a range value E which is determined depending on an error rate p. A comparison and determination unit outputs random error signals to be error bits when a numeric value A of the bit data output exists between the first and second reference values C, D. The random error signal has the error rate p, the number of times of error occurrences follows Poisson distribution, and a distribution of adjacent error occurrence intervals follows a geometric distribution.
    • 在随机误差信号发生器中,M序列产生电路并行地输出存储在每个寄存器中的位数据,第一生成电路顺序地输出响应于时钟改变预定值的第一参考值C, 第二产生电路输出从第一参考值C偏移根据错误率p确定的范围值E的第二参考值D. 当在第一和第二参考值C,D之间存在位数据输出的数值A时,比较和确定单元输出随机误差信号为误差位。随机误差信号具有误差率p, 错误发生遵循泊松分布,相邻误差发生间隔的分布遵循几何分布。