公开(公告)号：EP1545083A1

公开(公告)日：2005-06-22

申请号：EP03079137.0

申请日：2003-12-19

Applicant: STMicroelectronics Belgium N.V.

Inventor： Pisoni, Fabio

IPC: H04L27/26 ,  H04L25/03 ,  G06F17/14

CPC classification number: H04L27/2647 ,  H04L25/03159 ,  H04L2025/03414

Abstract: An equalizer for a multi carrier signal for carrying out equalization adapted to each carrier or group of carriers, Fourier transforms the multi carrier signal, and obtains difference terms of the multi carrier signal. Both are input to an adaptive filter, to output equalized signals, wherein decimation is applied to at least some of the difference terms input to the filter. This is notable for enabling the complexity to be reduced for a given performance level. In particular since only non-zero filter taps need to be stored and updated, coefficient memory and coefficient calculation capacity can be reduced. Another way to reduce complexity involves measuring noise for at least some of the carriers, and dynamically adapting the size of the filter on a per carrier basis according to global optimizion euristic algorithms which adapt this filter size based on the comparison between this noise and an optimal performance figure achieved in a previous ISI-ICI free measurement phase.

Abstract translation: 用于进行均衡angepasst到载波的每个载波或一组用于多载波信号的均衡器，傅立叶变换的多载波信号，并且获得多载波信号的差异方面。 既被输入到在自适应滤波器，来输出均衡的信号，抽取worin被施加到的至少一些输入到滤波器的差术语。 这是值得注意的使降低复杂性对于一个给定的性能水平。 特别是因为仅非零滤波器抽头需要被存储和更新，系数存储器和系数计算容量可被减小。 降低复杂性的另一种方法涉及到测量噪声对于至少一些所述载波，并动态地适应滤波器的大小以每个载波为基础雅丁全球optimizion euristic算法基于该噪声和最佳地之间的比较这个滤波器的尺寸相适应 性能数据在之前的ISI ICI免费测量阶段实现。

公开(公告)号：EP1434402B1

公开(公告)日：2008-07-30

申请号：EP02447272.2

申请日：2002-12-24

Applicant: STMicroelectronics Belgium N.V.

Inventor： Pisoni, Fabio

IPC: H04L27/26 ,  H03H17/04

CPC classification number: H04L27/2662 ,  H04L27/2657

公开(公告)号：EP1503293A3

公开(公告)日：2005-02-23

申请号：EP03079181.8

申请日：2003-12-24

Applicant: STMicroelectronics Belgium N.V.

Inventor： Pisoni, Fabio

IPC: G06F17/14

CPC classification number: G06F17/142

Abstract: An M-point Fractional Fourier is described using several 2M-points traditional Fourier transforms. The signal path is fed through a series of blocks including a first multiplier, a zero pad, an FFT 2m, a second multiplier, an IFFT 2M, a 1 st half element, and a third multiplier. The first and third multipliers have as their other inputs a value exp(-jπn 2 α) for n=0:M-1, derived from the clock offset signal represented by α.

公开(公告)号：EP1434142A1

公开(公告)日：2004-06-30

申请号：EP02447274.8

申请日：2002-12-24

Applicant: STMicroelectronics Belgium N.V.

Inventor： Pisoni, Fabio

IPC: G06F17/14

CPC classification number: G06F17/142 ,  G06F17/141 ,  H03H2017/0214

Abstract: An M-point Fractional Fourier is described using several 2M-points traditional Fourier transforms. The signal path is fed through a series of blocks including a first multiplier, a zero pad, an FFT 2m, a second multiplier, an IFFT 2M, a 1 st half element, and a third multiplier. The first and third multipliers have as their other inputs a value exp(-j n 2 ) for n=0:M-1, derived from the clock offset signal represented by.

Abstract translation: 使用几个2M点传统傅立叶变换来描述M点分数傅里叶。 信号路径通过包括第一乘法器，零焊盘，FFT2m，第二乘法器，IFFT 2M，第一半元件和第三乘法器的一系列块馈送。 对于n = 0：M-1，第一和第三乘法器具有作为其另一个输入的值exp（-j n 2），从由...表示的时钟偏移信号导出。

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。

公开(公告)号：EP1503293A2

公开(公告)日：2005-02-02

申请号：EP03079181.8

申请日：2003-12-24

Applicant: STMicroelectronics Belgium N.V.

Inventor： Pisoni, Fabio

IPC: G06F17/14

CPC classification number: G06F17/142

Abstract: An M-point Fractional Fourier is described using several 2M-points traditional Fourier transforms. The signal path is fed through a series of blocks including a first multiplier, a zero pad, an FFT 2m, a second multiplier, an IFFT 2M, a 1 st half element, and a third multiplier. The first and third multipliers have as their other inputs a value exp(-jπn 2 α) for n=0:M-1, derived from the clock offset signal represented by α.

Abstract translation: 使用几个2M点传统傅立叶变换来描述M点分数傅里叶。 信号路径通过包括第一乘法器，零焊盘，FFT2m，第二乘法器，IFFT 2M，第一半元件和第三乘法器的一系列块馈送。 对于n = 0：M-1，第一乘法器和第三乘法器具有作为其他输入的值exp（-j pi n 2 alpha），从由alpha表示的时钟偏移信号导出。

公开(公告)号：EP1434402A1

公开(公告)日：2004-06-30

申请号：EP02447272.2

申请日：2002-12-24

Applicant: STMicroelectronics Belgium N.V.

Inventor： Pisoni, Fabio

IPC: H04L27/26 ,  H03H17/04

CPC classification number: H04L27/2662 ,  H04L27/2657

Abstract: A clock offset compensation arrangement has a fractional interpolator for applying a trigonometric interpolation to a sampled input signal according to a clock offset signal. It uses transform based processing in the frequency domain. Compared to a polynomial type interpolation it can be easier to implement, and can achieve a closer approximation to a perfect interpolation. It can reduce the effects of non linear type errors introduced by truncation of higher powers. The arrangement can be applied to receivers or transmitters of multicarrier modems, or any application which needs rate adaption or synchronization.

Abstract translation: 时钟偏移补偿装置具有分数内插器，用于根据时钟偏移信号对采样输入信号应用三角内插。 它使用频域中的基于变换的处理。 与多项式插值相比，它可以更容易实现，并且可以更接近于完美的插值。 它可以减少由截断较高功率引入的非线性误差的影响。 该配置可以应用于多载波调制解调器的接收器或发射器，或者需要速率适配或同步的任何应用。