Adaptive interference suppression receiving apparatus for...

Pulse or digital communications – Spread spectrum – Direct sequence

Reexamination Certificate

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C375S232000, C375S231000, C375S144000

Reexamination Certificate

active

07136410

ABSTRACT:
An adaptive interference suppression receiver for a DS/CDMA system includes: input signal generators outputting a part of received signals of receiver antennas that has a coding block's transfer code; adaptive filter blocks filtering a complex signal output from the input signal generators with a tap weight updated based on a constraint MMSE criterion and estimating phase and amplitude components of a specific user channel using the filtering output signal to generate a channel-estimated signal; a signal restorer combining the channel-estimated signal and the filtering output signal and restoring an original signal; a signal selector for selecting known training data signal or the restored signal; and error generators comparing the channel-estimated signal and the filtering output signal and calculating an error between the two signals.

REFERENCES:
patent: 6175588 (2001-01-01), Visotsky et al.
patent: 6301293 (2001-10-01), Huang et al.
patent: 6377636 (2002-04-01), Paulraj et al.
patent: 6647077 (2003-11-01), Shan et al.
patent: 2003/0043887 (2003-03-01), Hudson
patent: 2004/0198452 (2004-10-01), Roy

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