An adaptive gain control with a variable step size for use in high-speed data communication systems

Author

Fertner, Antoni ; Sölve, Christer

Author_Institution

Ericsson Telecom AB, Stockholm, Sweden

Volume

44

Issue

11

fYear

1997

fDate

11/1/1997 12:00:00 AM

Firstpage

962

Lastpage

966

Abstract

A high-precision adaptive gain control is an important function in high-speed data communication systems. The nonsymmetric statistics of the received signal results in a biased value of gain, particularly if 2B1Q line code is used, which contains a periodically repeated synchronization word, i.e., a Barker sequence. A bias-free gain is obtained using a step size that depends on the statistics of the received signal. The additional computations may be successfully approximated by shift-add operations

Keywords

adaptive control; automatic gain control; data communication; data communication equipment; digital communication; subscriber loops; synchronisation; transceivers; Barker sequence; ISDN; adaptive gain control; bias-free gain; digital subscriber lines; high-precision adaptive gain control; high-speed data communication systems; periodically repeated synchronization word; received signal statistics; shift-add operations; variable step size; Adaptive control; CMOS technology; Data communication; Discrete cosine transforms; Gain control; Hardware; Programmable control; Signal processing algorithms; Systolic arrays; Very large scale integration;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.644051

Filename

644051