公开(公告)号：EP1531591A1

公开(公告)日：2005-05-18

申请号：EP03078543.0

申请日：2003-11-11

Applicant: STMicroelectronics Belgium N.V.

Inventor： Aerts, Wouter ,  Hug, Roland

IPC: H04L27/26 ,  H04L27/38

CPC classification number: H04L27/2657 ,  H04L27/3881

Abstract: A signal resampler carries out a time domain interpolation of an input signal for compensating for frequency offset, such as found in an ADSL system. A sample selector interpolator carries out part of the interpolation and a second, e.g. polynomial interpolator carries out the rest of the interpolation. The time interval between samples being interpolated, can be effectively divided between sample selector interpolator and a small second, e.g. polynomial interpolator. The complexity of the second, e.g. polynomial interpolator can be reduced or its accuracy increased if it is effectively interpolating over a much smaller time interval. The sample selector interpolator can be an oversampling arrangement, and enable the order of the second, e.g. polynomial interpolator to be reduced. Selected ones of the oversampled samples are fed to the second, e.g. polynomial interpolator to keep the operating frequency lower. A chain of upsamplers can be used to generate the oversampled samples.

Abstract translation: 信号重采样器执行输入信号的时域内插以补偿频偏，例如在ADSL系统中发现的。 采样选择器内插器执行一部分内插，而第二个例如内插器执行内插。 多项式内插器执行其余的内插。 被插值的样本之间的时间间隔可以在样本选择器内插器与小的秒之间有效地分配。 多项式插值器。 第二个的复杂性，例如 多项式内插器如果在更小的时间间隔内进行有效内插，则可以减少或提高其精度。 采样选择器内插器可以是一个过采样装置，并且可以启用第二个采样选择器的顺序。 多项式内插器被减少。 将选定的一些过采样样本馈送到第二个例如 多项式内插器保持工作频率更低。 一系列上采样器可用于生成过采样采样。

公开(公告)号：EP1434401A1

公开(公告)日：2004-06-30

申请号：EP02447271.4

申请日：2002-12-24

Applicant: STMicroelectronics Belgium N.V.

Inventor： Pisoni, Fabio ,  Hug, Roland

IPC: H04L27/26 ,  H04L25/03

CPC classification number: H04L25/03159 ,  H04L25/03012 ,  H04L27/2647

Abstract: An equalizer for a multi carrier transmission system, converts a transmitted multi carrier signal into sampled frequency domain signals, and suppresses time domain delay dispersion, on the sampled frequency domain signals. It exploits circulant decomposition of a Toeplitz matrix to enable the computationally heavy evaluation of a matrix multiplied by a vector, to be avoided. Increased precision arises from the frequency domain processing being equivalent to a longer time domain FIR filter than is normally practical. The amount of compensation for different carriers can be adjusted, which can lead to increased precision.

Abstract translation: 一种用于多载波传输系统的均衡器，将所发送的多载波信号转换为采样的频域信号，并对采样的频域信号抑制时域延迟色散。 它利用Toeplitz矩阵的循环分解，使得能够计算重估计矩阵乘以一个向量，以避免。 与通常实际相比，频域处理相当于更长时间的FIR滤波器产生的精度提高。 可以调整不同载体的补偿量，从而提高精度。