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The Multistage Wiener filter (MWF) is an efficient technique for interference mitigation in CDMA systems. A limitation to its implementation, however, is that poor rank selection causes performance degradation. Methods exist to overcome this issue, but they are often computationally expensive, so a rank prediction technique is desirable. In this paper, the authors develop one such method based on the number of codes that correlate with the code of interest above a set threshold, obtained by experiment.
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