Title :
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
fDate :
11/1/1997 12:00:00 AM
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;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
