公开(公告)号：DE60227968D1

公开(公告)日：2008-09-11

申请号：DE60227968

申请日：2002-12-24

Applicant: ST MICROELECTRONICS BELGIUM NV

Inventor： PISONI FABIO

IPC: H04L27/26 ,  H03H17/04 ,  H03H17/06

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.

公开(公告)号：DE60313158D1

公开(公告)日：2007-05-24

申请号：DE60313158

申请日：2003-05-19

Applicant: ST MICROELECTRONICS NV ,  ST MICROELECTRONICS BELGIUM NV

Inventor： PISONI FABIO ,  HUG ROLAND ,  BONAVENTURA MARCO

IPC: H04L27/26 ,  H04B3/23 ,  H04L25/03

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.

公开(公告)号：AU2003229148A8

公开(公告)日：2003-12-02

申请号：AU2003229148

申请日：2003-05-19

Applicant: ST MICROELECTRONICS NV ,  ST MICROELECTRONICS BELGIUM NV

Inventor： PISONI FABIO ,  HUG ROLAND ,  BONAVENTURA MARCO

IPC: H04B3/23 ,  H04L25/03 ,  H04L27/26

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.