Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2006-11-07
2006-11-07
Ghebretinsae, Temesghen (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C329S318000, C329S320000, C348S021000, C348S607000, C455S063300, C455S296000
Reexamination Certificate
active
07133476
ABSTRACT:
Information is recovered from a composite signal including first and second component signals modulated according to respective first and second modulations, for example, 8-PSK and GMSK. The composite signal is processed based on predetermined characteristics of the first and second modulations, for example, signal rotations, to generate a channel model for the first component signal and a whitening filter for the second component signal. The composite signal is filtered according to the whitening filter to generate a filtered signal. A symbol hypothesis for a symbol of the first component signal is evaluated using a metric with respect to the filtered signal that is a function of the whitening filter and the channel model, for example, in a multidimensional Viterbi symbol estimation algorithm. The invention may be embodied as methods, apparatus and computer program products.
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Arslan Huseyin
Ramesh Rajaram
Ghebretinsae Temesghen
Telefonaktiebolaget LM Ericsson (publ)
Torres Juan Alberto
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