公开(公告)号：EP1746427B1

公开(公告)日：2008-01-09

申请号：EP05015952.4

申请日：2005-07-22

申请人： Institute of Electronics and Computer Science of Latvian University

发明人： Bilinskis, Ivars ,  Artjuhs, Jurijs ,  Ribakovs, Aleksandrs

IPC分类号： G01R23/16

CPC分类号： H03M1/128 ,  G01R23/16

公开(公告)号：EP1701459A1

公开(公告)日：2006-09-13

申请号：EP05005084.8

申请日：2005-03-09

申请人： Institute of Electronics and Computer Science of Latvian University

发明人： Artjuhs, Jurijs ,  Bilinskis, Ivars ,  Min, Mart ,  Strautmanis, Gundars

IPC分类号： H04J3/04 ,  H03M1/12

CPC分类号： H03M1/1205 ,  H03M1/128

摘要： The method is used for digitizing of multiple analog signals and buffering or transmitting of digital replicas of such signals. The method comprises the conditioning of the analog signals and a digitizing of the conditioned analog signals. The digitizing comprises steps of generating of a periodic reference signal, generating of pulses at instants when each input signal crosses the reference signal in one direction, time division multiplexing of set pulses, sampling of the reference signal at sampling instants defined by the multiplexed pulses and quantizing of the obtained samples. After the digitizing the quantized samples are buffered or transmitted in a digital form.

摘要翻译： 该方法用于数字化多个模拟信号，并缓存或发送这些信号的数字副本。 该方法包括对模拟信号的调节和经调节的模拟信号的数字化。 数字化包括产生周期性参考信号的步骤，当每个输入信号在一个方向上跨越参考信号时产生脉冲，设定脉冲的时分多路复用，由复用脉冲定义的采样时刻的参考信号的采样;以及 量化所获得的样品。 数字化后，量化样本以数字形式进行缓冲或传输。

公开(公告)号：EP1746427A1

公开(公告)日：2007-01-24

申请号：EP05015952.4

申请日：2005-07-22

申请人： Institute of Electronics and Computer Science of Latvian University

发明人： Bilinskis, Ivars ,  Artjuhs, Jurijs ,  Ribakovs, Aleksandrs

IPC分类号： G01R23/16

CPC分类号： H03M1/128 ,  G01R23/16

摘要： A method and apparatus for digital spectral estimations of wideband analog signals in a frequency range not limited by the mean sampling frequency is disclosed. To widen the frequency range by elimination of aliasing while sampling an analog input signal at mean frequency considerably lower than the upper signal frequency, signal sample values are taken non-uniformly at pseudorandom time instants. To reduce the estimation cross-interference errors due to the non-uniformities of the sample value taking process, the obtained sample values are subdivided into a number of periodic phase-shifted pseudo-randomly decimated sample value sub-streams. A special signal processor, adapted to the specific non-uniformities of the particular sample value sub-stream, is used for performing spectral estimations by processing each of these sub-streams. As these sample value sub-streams are basically periodic with some sample values pseudo-randomly skipped, well-defined aliasing takes place at this stage. However, the aliasing conditions for processing each of the sample value pseudorandom sub-sequence are different due to variant phase-shifts of the respective periodic pseudo-randomly decimated sampling processes. Aggregating of processing results from all processors provides spectral estimates not corrupted by aliasing and errors due to the sampling non-uniformities.

摘要翻译： 公开了在不受平均采样频率限制的频率范围内的宽带模拟信号的数字频谱估计的方法和装置。 通过消除混叠来扩展频率范围，同时以比上一个信号频率低的平均频率对模拟输入信号进行采样，信号样本值在伪随机时刻不均匀。 为了减少由于采样值取样处理的不均匀性引起的估计交叉干扰误差，将获得的采样值细分为多个周期性相移伪随机抽取样本值子流。 适用于特定样本值子流的特定不均匀性的特殊信号处理器用于通过处理这些子流中的每一个来执行频谱估计。 由于这些样本值子流基本上是周期性的，其中一些样本值被伪随机跳过，所以在此阶段进行了明确的混叠。 然而，由于相应的周期性伪随机抽取抽样过程的变化相移，用于处理每个样本值伪随机子序列的混叠条件是不同的。 来自所有处理器的处理结果的聚合提供了由于采样不均匀性而导致的混叠和误差不会损坏的频谱估计。