Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2006-12-05
2006-12-05
Patel, Jay K. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S144000
Reexamination Certificate
active
07145942
ABSTRACT:
When once determined to be free of any demodulation error by an interference removing unit provided user by user, a replica signal calculated by the interference removing unit is subtracted from an input signal vector, and a calculated user signal is output as it is as a final user signal. When it is determined by the interference removing unit that there is a demodulation error, the user signal is again calculated by the interference removing unit of an interference canceller of a next stage. As subtraction of the replica signal corresponding to the user signal having a demodulation error from the input signal vector is inhibited, precision of the interference wave removal can be improved.
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Doi Yoshiharu
Iwami Masashi
Kitakado Jun
Nishimura Toshihiko
Ogawa Yasutaka
Japan as represented By President Of Hokkaido University
Lugo David B.
Patel Jay K.
Westerman, Hattori, Daniels & Adrian , LLP.
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