Apparatus and method for interference cancellation in a...

Details Apparatus and method for interference cancellation in a... Apparatus and method for interference cancellation in a...

2007-01-10

2011-10-11

Payne, David C. (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S346000, C375S316000

Reexamination Certificate

active

08036294

ABSTRACT:
A symbol demapping method and apparatus for efficient interference cancellation in a wireless communication system. Decision signal points are generated which include decision signal points based on a modulation scheme and a virtual signal point added to a zero point. A magnitude of a complex value of an input signal is compared with a threshold based on system setting. When the magnitude of the complex value is less than the threshold, the virtual signal point of the zero point is mapped and output as a target decision signal point. When the magnitude of the complex value is greater than or equal to the threshold, one of the decision signal points based on the modulation scheme is mapped and output according to the com0plex value.

REFERENCES:
patent: 7248879 (2007-07-01), Walton et al.
patent: 7430256 (2008-09-01), Zhidkov
patent: 7555031 (2009-06-01), Chan et al.
patent: 2006/0115079 (2006-06-01), Heiman et al.
patent: 1020050030457 (2005-03-01), None

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