Self-adaptive equalizer for baseband data signals

Details Self-adaptive equalizer for baseband data signals Self-adaptive equalizer for baseband data signals

H - Electricity

04

L

333/28

H04L 25/03 (2006.01) H03H 21/00 (2006.01) H04B 3/14 (2006.01)

Patent

CA 1211516

23 ABSTRACT "Self-adaptive equalizer for baseband data signals." A self-adaptive equalizer is employed in a data modem for correcting in the baseband a received data signal. The equalizer comprises a difference circuit for determining the difference between a received signal and a correction signal formed at a sampling frequency by a transversal filter having adjustable coefficients, and for producing a corrected signal which is applied to a decision circuit. The output of this decision circuit is applied to this transversal filter whose coefficients are adjusted so as to minimize the mean-square value of an error signal. This error signal at an actual sampling instant is determined by forming the difference between the value of the corrected signal at that sampling in- stant and the value of the corrected signal at a previous sampling instant, previously multiplied by the ratio be- tween the value of the recovered data at the actual sampling instant and the value of the recovered data at the previous sampling instant.

438538

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