Pulse or digital communications – Receivers – Angle modulation
Reexamination Certificate
2007-07-12
2010-12-07
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Receivers
Angle modulation
C375S329000, C375S346000, C375S350000, C375S213000
Reexamination Certificate
active
07848460
ABSTRACT:
A composite baseband signal includes a desired signal component modulated according to a first modulation scheme and an interfering signal component modulated according to a second modulation scheme. Information is recovered from the composite signal by applying a phase rotation associated with the second modulation scheme to the composite signal to generate a rotated signal. Based on the rotated signal, a channel model associated with the desired signal component and interference cancelling filter coefficients associated with the interfering signal component are generated. The rotated signal is filtered according to the interference cancelling filter coefficients to suppress the interfering signal component from the rotated signal. The filtered signal is equalized based on branch metrics derived from the channel model and symbol hypotheses rotated in accordance with a difference in phase rotations associated with the first and second modulations to recover information from the desired signal component.
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Coats & Bennett P.L.L.C.
Liu Shuwang
Tayong Helene
Telefonaktiebolaget LM Ericsson (publ)
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