Estimation of signal to interference ratio in conjunction with interference cancellation
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United States of America Patent
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Apr 30, 2013
Grant Date -
Jul 21, 2011
app pub date -
Feb 26, 2009
filing date -
Apr 29, 2008
priority date (Note) -
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Abstract
A node (2) for use in a cellular communication system having interfering signals and employing interference cancellation techniques for mitigating the interfering signals comprises means (24) for obtaining a signal value representing power of a first signal. The node (2) further comprises means (25) for obtaining a precancellation interference value representing powers of signals interfering with the first signal before the interference cancellation is employed. A predictor (23) is arranged for predicting a postcancellation interference value after the interference cancellation as a function of the precancellation interference value. An estimator (29) is connected to the predictor (23) and the means (24) for obtaining a signal value. The estimator (29) is arranged for estimating a signal-to-interference ratio as a ratio between the signal value representing the power of the first signal and the predicted postcancellation interference value.
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