公开(公告)号：US08307248B2

公开(公告)日：2012-11-06

申请号：US12306942

申请日：2006-06-30

申请人： Håkan Johansson ,  Per Löwenborg

发明人： Håkan Johansson ,  Per Löwenborg

IPC分类号： G06F11/00

CPC分类号： H03M1/1009 ,  H03M1/1215

摘要： A method and a module for estimating a plurality of relative channel-error for at least one signal with respect to a reference signal. The signals and are produced by an analog-to-digital module including parallel and time interleaved analog-to-digital converters and are received by an estimation module. The method is performed by the estimation module and includes defining a function representing a relationship between the reference signal and an arbitrary signal in the group of signals, selecting a first reference signal in the group of signals, selecting a second signal from the remaining signals in the group, optimizing the function so as to obtain an estimate of the plurality of relative channel-error, and repeating the selecting a second signal and optimizing the function for each remaining signal.

摘要翻译： 一种用于针对参考信号估计至少一个信号的多个相对信道误差的方法和模块。 该信号由包括并行和时间交织的模 - 数转换器的模数 - 数字模块产生，并由估计模块接收。 所述方法由所述估计模块执行，并且包括定义表示所述参考信号与所述信号组中的任意信号之间的关系的函数，选择所述信号组中的第一参考信号，从所述剩余信号中选择第二信号 所述组优化所述功能，以获得所述多个相对信道误差的估计，并重复选择第二信号并优化每个剩余信号的功能。

公开(公告)号：US08009070B2

公开(公告)日：2011-08-30

申请号：US12665449

申请日：2007-06-21

申请人： Håkan Johansson ,  Per Löwenborg

发明人： Håkan Johansson ,  Per Löwenborg

IPC分类号： H03M1/06

CPC分类号： H03M1/0626 ,  H03M1/1215

摘要： A method for the compensation of frequency-response mismatch errors in M-channel time-interleaved ADCs. The compensation is done through an M-periodic time-varying filter hn(k)=hn mod M(k) (2), or, equivalently, a set of M time-invariant filters hn(k), n=0, 1, . . . , M−1. The overall compensation system is constructed by determining the M filter impulse responses hn(k) through M separate matrix inversions, where the size of the matrices equals the filter impulse response length. Also, a compensated M-channel time-interleaved ADC based on and performing the method.

摘要翻译： 一种用于补偿M通道时间交织ADC中的频率 - 响应失配误差的方法。 补偿通过M周期时变滤波器hn（k）= hn mod M（k）（2）完成，或者等效地，一组M个时不变滤波器hn（k），n = 0,1 ，。 。 。 ，M-1。 通过确定M个滤波器脉冲响应hn（k）到M个独立的矩阵反演来构造总体补偿系统，其中矩阵的大小等于滤波器脉冲响应长度。 此外，基于并执行该方法的经补偿的M信道时间交织ADC。

公开(公告)号：US06476754B2

公开(公告)日：2002-11-05

申请号：US09966983

申请日：2001-10-01

申请人： Per Löwenborg ,  Håkan Johansson

发明人： Per Löwenborg ,  Håkan Johansson

IPC分类号： H03M112

CPC分类号： H03M1/0626 ,  H03M1/0836 ,  H03M1/1215

摘要： The present invention refers to a method and apparatus for reconstruction of a nonuniformly sampled bandlimited analog signal xa(t), said nonuniformly sampled signal comprising N subsequences xk(m), k=0, 1, . . . , N−1, N≧2, obtained through sampling at a sampling rate of 1/(MT) according to xk(m)=xa(nMT+tk), where M is an integer, and tk=kMT/N+&Dgr;tk, &Dgr;tk being different from zero. The invention comprises forming a new sequence y(n) from said N subsequences xk(m) such that y(n) at least contains the same information as x(n)=xa(nT), i.e. xa(t) sampled with a sampling rate of 1/T, in a frequency region lower than &ohgr;0, &ohgr;0 being a predetermined limit frequency, by means of (i) upsampling each of said N subsequences xk(m), k=0, 1, . . . , N−1, by a factor M, M being a positive integer; (ii) filtering each of said upsampled N subsequences xk(m), k=0, 1, . . . , N−1, by a respective digital filter; and (iii) adding said N digitally filtered subsequences to form y(n). The respective digital filter is preferably a fractional delay filter and has preferably a frequency response Gk=ake(−j&ohgr;sT), k=0, 1, . . . , N−1, in the frequency band |&ohgr;T|≦&ohgr;0T, ak being a constant and s=d+tk, d being an integer.

摘要翻译： 本发明涉及用于重构非均匀采样的带限模拟信号xa（t）的方法和装置，所述非均匀采样信号包括N个子序列x k（m），k = 0,1。 。 。 根据xk（m）= xa（nMT + tk）以1 /（MT）的采样率采样获得的N-1，N> = 2，其中M是整数，tk = kMT / N + DELTAtk，DELTAtk不同于零。 本发明包括从所述N个子序列xk（m）形成新的序列y（n），使得y（n）至少包含与x（n）= xa（nT）相同的信息，即，x 通过（i）对所述N个子序列xk（m），k = 0,1中的每一个进行上采样，在低于ω0的频率区域中的1 / T的采样率为ω= 0。 。 。 ，N-1，以因子M，M为正整数; （ii）滤除所述上采样的N个子序列x k（m）中的每一个，k = 0,1。 。 。 ，N-1，相应的数字滤波器; 和（iii）将所述N个经数字滤波的子序列相加以形成y（n）。 相应的数字滤波器优选地是分数延迟滤波器，并且优选地具有频率响应Gk = ake（-jomegasT），k = 0,1。 。 。 ，N-1，在频带|ω= |ω=ω= 0，ak为常数，s = d + tk，d为整数。

公开(公告)号：US20100182174A1

公开(公告)日：2010-07-22

申请号：US12665449

申请日：2007-06-21

申请人： Håkan Johansson ,  Per Löwenborg

发明人： Håkan Johansson ,  Per Löwenborg

IPC分类号： H03M1/06

CPC分类号： H03M1/0626 ,  H03M1/1215

摘要： A method for the compensation of frequency-response mismatch errors in M-channel time-interleaved ADCs. The compensation is done through an M-periodic time-varying filter hn(k)=hn mod M(k) (2), or, equivalently, a set of M time-invariant filters hn(k), n=0, 1, . . . , M−1. The overall compensation system is constructed by determining the M filter impulse responses hn(k) through M separate matrix inversions, where the size of the matrices equals the filter impulse response length. Also, a compensated M-channel time-interleaved ADC based on and performing the method.

摘要翻译： 一种用于补偿M通道时间交织ADC中的频率 - 响应失配误差的方法。 补偿通过M周期时变滤波器hn（k）= hn mod M（k）（2）完成，或者等效地，一组M个时不变滤波器hn（k），n = 0,1 ，。 。 。 ，M-1。 通过确定M个滤波器脉冲响应hn（k）到M个独立的矩阵反演来构造总体补偿系统，其中矩阵的大小等于滤波器脉冲响应长度。 此外，基于并执行该方法的经补偿的M信道时间交织ADC。

公开(公告)号：US07741982B2

公开(公告)日：2010-06-22

申请号：US11883718

申请日：2005-02-04

申请人： Håkan Johansson ,  Per Löwenborg

发明人： Håkan Johansson ,  Per Löwenborg

IPC分类号： H03M1/12

CPC分类号： H03M1/0836 ,  H03M1/1215

摘要： A method for estimating a relative time difference vector in a group of digitized signals from a time interleaved analog-to-digital module having a plurality of parallel and time interleaved analog-to-digital converters. The method comprises the steps of selecting (S1) one of said digitized signals as a reference signal, calculating (S2-S3) an actual time delay between each of the remaining signals and said reference signal, and subtracting (S4), for each of said remaining signals, an intended interleaving time delay from said time delay. In order for this method to provide the correct estimate, the signal must be bandlimited, not only to the system bandwidth, but to the bandwidth of one ADC. However, given this bandwidth limitation, the estimation is very precise, and therefore enables reconstruction of the digitized signal without feedback.

摘要翻译： 一种用于估计来自具有多个并行和时间交织的模数转换器的时间交织的模数 - 数字模块的一组数字化信号中的相对时间差矢量的方法。 该方法包括以下步骤：选择（S1）所述数字化信号之一作为参考信号，计算（S2-S3）每个剩余信号与所述参考信号之间的实际时间延迟，并且减去（S4） 所述剩余信号，来自所述时间延迟的预期交织时间延迟。 为了使该方法能够提供正确的估计，信号必须是带宽限制的，不仅对系统带宽有一定的限制，也可以是一个ADC的带宽。 然而，鉴于该带宽限制，估计是非常精确的，因此能够重建数字化信号而没有反馈。

公开(公告)号：US20100049483A1

公开(公告)日：2010-02-25

申请号：US12306942

申请日：2006-06-30

申请人： Håkan Johansson ,  Per Löwenborg

发明人： Håkan Johansson ,  Per Löwenborg

IPC分类号： G06F17/10

CPC分类号： H03M1/1009 ,  H03M1/1215

摘要： A method and a module for estimating a plurality of relative channel-error for at least one signal with respect to a reference signal. The signals and are produced by an analog-to-digital module including parallel and time interleaved analog-to-digital converters and are received by an estimation module. The method is performed by the estimation module and includes defining a function representing a relationship between the reference signal and an arbitrary signal in the group of signals, selecting a first reference signal in the group of signals, selecting a second signal from the remaining signals in the group, optimizing the function so as to obtain an estimate of the plurality of relative channel-error, and repeating the selecting a second signal and optimizing the function for each remaining signal.

摘要翻译： 一种用于针对参考信号估计至少一个信号的多个相对信道误差的方法和模块。 该信号由包括并行和时间交织的模 - 数转换器的模数 - 数字模块产生，并由估计模块接收。 所述方法由所述估计模块执行，并且包括定义表示所述参考信号与所述信号组中的任意信号之间的关系的函数，选择所述信号组中的第一参考信号，从所述剩余信号中选择第二信号 所述组优化所述功能，以获得所述多个相对信道误差的估计，并重复选择第二信号并优化每个剩余信号的功能。