Telecommunications – Transmitter and receiver at separate stations – Distortion – noise – or other interference prevention,...
Reexamination Certificate
2011-08-16
2011-08-16
Pan, Yuwen (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Distortion, noise, or other interference prevention,...
Reexamination Certificate
active
08000654
ABSTRACT:
A wireless network base station capable of canceling interference caused by a dominant interferer signal from a mobile station. The base station comprises down-converts an RF to a down-converted signal, r(n). K complex PN demodulators multiply the down-converted complex r(n) signal by PN code sequences associated with each of the K mobile stations to produce K chip streams. K Walsh code demodulators multiply each of the K chip streams by a Walsh code associated with a mobile stations to produce K raw user signals. K subtractors subtract a first estimated interference signal associated with the dominant interferer signal from the K raw user signals to produce K estimated user signals. A detector receives the K estimated user signals and produces a detected user signal for each of the mobile stations. An interference estimator then determines which detected user signal is the dominant interferer signal.
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patent: 2003/0012264 (2003-01-01), Papasakellariou et al.
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Sergio Verdu, Multiuser Detection, Cambridge University Press, 1998.
Rajkotia Purva R.
Van Rensburg Cornelius
Pan Yuwen
Samsung Electronics Co,. Ltd.
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