Re-orthogonalization of wideband CDMA signals
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United States of America Patent
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Jan 19, 1999
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app pub date -
Dec 11, 1995
filing date -
Dec 11, 1995
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Abstract
A method and receiver which provides, among other features, for resubtraction of an already subtracted signal in order to eliminate subtraction errors, termed re-orthogonalization, is described herein. According to exemplary embodiments, pairwise combinations of spreading codes are used to despread received composite signals. For example, these pairwise combinations can include a first spreading code associated with a signal that has already been subtracted and a second spreading code associated with a signal which is weaker than that associated with the first spreading code. In this way both resubtraction and subtraction are performed at the same time.
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