公开(公告)号：US08767876B2

公开(公告)日：2014-07-01

申请号：US13721455

申请日：2012-12-20

Applicant: ST-Ericsson SA

Inventor： Jorma Pertti Matero

IPC: H04L27/12

CPC classification number: H04L27/00 ,  H03C3/0933 ,  H03C2200/0016 ,  H03C2200/002 ,  H03C2200/0054 ,  H04L25/03834 ,  H04L25/06 ,  H04L27/2017 ,  H04L27/367

Abstract: Problems arising from a pre-emphasis filter, particularly an infinite-impulse-response filter, in a signal modulator are solved by detecting sequences of the same bit or symbol in a modulation signal and compensating the corresponding d.c. offset in the signal generated by the pre-emphasis filter without real-time feedback. The amount of offset compensation can be defined during design of the modulator or adjusted or calibrated during production. It is not necessary to change the transfer function of the pre-emphasis filter, but only to correct the d.c. offset of the filter output signal.

Abstract translation: 通过检测调制信号中相同位或符号的序列来解决信号调制器中的预加重滤波器，特别是无限脉冲响应滤波器引起的问题，并补偿相应的直流电平。 由预加重滤波器产生的信号中的偏移量没有实时反馈。 偏移补偿量可以在调制器的设计期间进行定义，或者在生产期间进行调整或校准。 不需要改变预加重滤波器的传递函数，只能改正直流电压。 滤波器输出信号的偏移。