公开(公告)号：US07512196B2

公开(公告)日：2009-03-31

申请号：US10878645

申请日：2004-06-28

申请人： Sassan Tabatabaei

发明人： Sassan Tabatabaei

IPC分类号： H03D1/04

CPC分类号： G01R29/26 ,  G01R31/31709

摘要： A method of estimating random jitter from measured samples of a transmitted data signal includes a first step of obtaining a plurality of measurements (e.g., pulse widths) for selected signal edges within a transmitted data stream, where the data stream comprises a repeating data pattern having a known bit length and known number of rising edges, and wherein the time difference between adjacent measurements is determined by an event count increment equal to an integer multiple of the known number of rising edges. A time interval error (TIE) value is then computed for each measured signal edge and transformed into corresponding frequency components that are representative of both noise floor and multiple distinct frequency peaks. Noise floor is isolated and the power of the noise floor may be computed to provide an estimate of random jitter variance, from which the standard deviation may be calculated.

摘要翻译： 从发送的数据信号的测量样本估计随机抖动的方法包括获得针对所发送的数据流内的所选信号边缘的多个测量（例如，脉冲宽度）的第一步骤，其中数据流包括具有 已知位长度和已知数量的上升沿，并且其中相邻测量之间的时间差由等于已知数量的上升沿的整数倍的事件计数增量确定。 然后为每个测量的信号边缘计算时间间隔误差（TIE）值，并将其转换为代表噪声基底和多个不同频率峰值的相应频率分量。 噪声基底是隔离的，并且可以计算噪声底层的功率以提供随机抖动方差的估计，从该估计可以计算标准偏差。

公开(公告)号：US08255188B2

公开(公告)日：2012-08-28

申请号：US12267107

申请日：2008-11-07

申请人： Sassan Tabatabaei

发明人： Sassan Tabatabaei

IPC分类号： H04B15/00

CPC分类号： G01R31/31709

摘要： Disclosed is a system and related methodology for providing fast low frequency jitter rejection in the measurement of signals under test. A signal under test may be sampled alternately with a reference signal under similar conditions. The resulting sampled signal blocks may then be processed to subtract the known calibrated value of the reference signal from the average signal under test.

摘要翻译： 公开了一种用于在测量被测信号时提供快速低频抖动抑制的系统和相关方法。 在类似条件下，可以用参考信号交替地对被测信号进行采样。 然后可以对所得到的采样信号块进行处理，以从所测试的平均信号中减去参考信号的已知校准值。

公开(公告)号：US20090132207A1

公开(公告)日：2009-05-21

申请号：US12267107

申请日：2008-11-07

申请人： Sassan Tabatabaei

发明人： Sassan Tabatabaei

IPC分类号： G01R23/00

CPC分类号： G01R31/31709

摘要： Disclosed is a system and related methodology for providing fast low frequency jitter rejection in the measurement of signals under test. A signal under test may be sampled alternately with a reference signal under similar conditions. The resulting sampled signal blocks may then be processed to subtract the known calibrated value of the reference signal from the average signal under test.

摘要翻译： 公开了一种用于在测量被测信号时提供快速低频抖动抑制的系统和相关方法。 在类似条件下，可以用参考信号交替地对被测信号进行采样。 然后可以对所得到的采样信号块进行处理，以从所测试的平均信号中减去参考信号的已知校准值。

公开(公告)号：US20080319691A1

公开(公告)日：2008-12-25

申请号：US12172845

申请日：2008-07-14

申请人： Sassan Tabatabaei

发明人： Sassan Tabatabaei

IPC分类号： G01R13/00

CPC分类号： G01R31/31709 ,  H04L1/205

摘要： Methodologies are disclosed for analyzing periodic jitter is a signal pattern using a continuous time interval analyzer. Sampled signal patterns may be correlated using time interval error calculations to determine start and stop sequences within sampled blocks of signal data while sampling synchronization may be achieved based on time interval calculations or pattern interval error calculations.

摘要翻译： 公开了用于分析周期性抖动的方法是使用连续时间间隔分析器的信号模式。 采样信号模式可以使用时间间隔误差计算来相关联，以确定采样信号数据块内的起始和停止序列，而采样同步可以基于时间间隔计算或模式间隔误差计算来实现。

公开(公告)号：US20080267274A1

公开(公告)日：2008-10-30

申请号：US12172861

申请日：2008-07-14

申请人： Sassan Tabatabaei

发明人： Sassan Tabatabaei

IPC分类号： H04B17/00

CPC分类号： G01R31/31709 ,  H04L1/205

摘要： Methodologies are disclosed for analyzing periodic jitter is a signal pattern using a continuous time interval analyzer. Sampled signal patterns may be correlated using time interval error calculations to determine start and stop sequences within sampled blocks of signal data while sampling synchronization may be achieved based on time interval calculations or pattern interval error calculations.