Adaptive channel equalizer for use in digital communication syst

Details Adaptive channel equalizer for use in digital communication syst Adaptive channel equalizer for use in digital communication syst

1997-12-01

1999-10-05

Pham, Chi H.

Pulse or digital communications

Equalizers

Automatic

375235, 708323, 370210, 370480, H03H 730, H03H 740

Patent

active

059635924

ABSTRACT:
An adaptive channel equalizer for use in OFDM receiver is disclosed. The adaptive channel equalizer comprises a first complex multiplier for outputting a first in-phase complex multiplication signal and a first quadrature phase complex multiplication signal; a reference signal generator for generating a reference signal; an error calculator for outputting an in-phase error signal and a quadrature phase error signal; a delay unit for outputting an in-phase delay signal and a quadrature phase delay signal; a gain controller for outputting an in-phase gain control signal and a quadrature phase gain control signal; a second complex multiplier for outputting a second in-phase complex multiplication signal and a second quadrature phase complex multiplication signal; an adder for outputting updated in-phase and quadrature phase coefficients; an address generator for generating a write address signal and a read address signal; a storage unit for storing the updated in-phase and quadrature phase coefficients, and outputting the updated coefficients; an initial coefficients generator for generating an initial coefficients; a selecting signal generator for generating a selecting signal; and a multiplexing unit for selecting one of the initial coefficients and the updated coefficients according to the selecting signal.

REFERENCES:
patent: 5502507 (1996-03-01), Kim
patent: 5524125 (1996-06-01), Tsujimoto
patent: 5682376 (1997-10-01), Hayashino et al.
patent: 5812523 (1998-09-01), Isaksson et al.
patent: 5818813 (1998-10-01), Saito et al.

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