Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2011-04-19
2011-04-19
Ha, Dac V (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S267000, C375S346000, C455S501000, C455S063100
Reexamination Certificate
active
07929593
ABSTRACT:
Methods and apparatus for processing a composite communication signal comprising two or more received signals of interest are disclosed. An interference-suppressing receiver, which may comprise a G-Rake receiver or a linear chip equalizer, utilizes a square-root covariance matrix in processing received signals, where the square-root covariance matrix represents impairment covariance or data covariance for the composite communication signal. In an exemplary method, a receiver detects symbols, corresponding to a signal of interest, from the composite communication signal, using processing weights calculated from a square-root covariance matrix and a net channel response for the signal of interest. The method further comprises calculating a reconstructed version of the signal of interest from the detected first symbols, generating an updated communication signal by subtracting the reconstructed version of the first signal of interest from the composite communication signal, and updating the square-root covariance matrix to obtain an updated square-root covariance matrix.
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Cozzo Carmela
Fulghum Tracy L.
Khayrallah Ali S.
Coats & Bennett P.L.L.C.
Ha Dac V
Telefonaktiebolaget LM Ericsson (publ)
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