Title:
METHOD AND DEVICE FOR CHANGING COEFFICIENT IN COMPLEX ADAPTIVE EQUALIZER
Document Type and Number:
Japanese Patent JPH05226975
Kind Code:
A
Abstract:
PURPOSE: To reduce a convergence time by updating in parallel each product with preceding data as to N-set of coefficients, to bring about complex coefficients whose N-set of coefficients are updated for selective input to an equalizer filter. CONSTITUTION: A multiplier means may be made up of a plurality of programmable logic array(PLA) multiplier stages, corresponding to a plurality of delay stages in a delay section 94. Each delay stage and PLA multiplier stage corresponds to an accumulator and to any of gain adjustment stages 102a-102n to provide a parallel processing path. Each parallel processing path 120 causes a distributed VLSI slice in the manufacture of an integrated circuit. Since a coefficient update calculation circuit updates all N-set of coefficients, in parallel for each filter clock cycle in place of updating one coefficient for one cycle, then no detrimental adverse effect is received on a convergence time of an equalizer, due to the actual execution of the LMS algorithm.
Inventors:
UU ETSUCHI PAIKU
SUKOTSUTO EE RERII
AREN U
SUKOTSUTO EE RERII
AREN U
Application Number:
JP21873892A
Publication Date:
September 03, 1993
Filing Date:
July 27, 1992
Export Citation:
Assignee:
GEN INSTRUMENT CORP
International Classes:
H03H15/00; H03H17/00; H04B3/06; H04L25/03; H04L27/01; H03H21/00; (IPC1-7): H03H17/00; H03H17/02; H03H21/00; H04B3/06; H04L27/01
Attorney, Agent or Firm:
Sumio Takeuchi (2 outside)