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Title:
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An Efficient Detection Technique for Synchronous CDMA Communication Systems Based on the Expectation Maximization Algorithm |
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Author:
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Borran, Mohammad Jaber; Nasiri-Kenari, Masoumeh
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Type:
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Journal Paper |
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Keywords:
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Code-division multiple-access (CDMA) systems; expectation maximization (EM) algorithm; multiuser detection; spread spectrum |
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Citation:
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M. J. Borran and M. Nasiri-Kenari, "An Efficient Detection Technique for Synchronous CDMA Communication Systems Based on the Expectation Maximization Algorithm," IEEE Vehicular Technology Conference (VTC), vol. 49, pp. 1663-1669, 2000. |
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Abstract:
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Maximum likelihood detection of superimposed signals in code-division multiple access (CDMA) communication systems has a computational complexity that is exponential in the number of users, and its implementation is practically prohibitive even for a moderate number of users. Applying the expectation maximization algorithm to this problem, we decompose the multiuser detection problem into a series of single-user problems, and thus present an iterative computationally efficient algorithm for detection of superimposed signals in synchronous direct-sequence CDMA communication systems. The resulting structure includes the well-known multistage detector as one of its special cases. With a proper choice of its parameters, the new detector can achieve the advantages of both the multistage and conventional detector and have good performance for both strong and weak users. |
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Date Published:
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2000-09-20 |
