Probabilistic algorithms for blind adaptive multiuser detection
نویسندگان
چکیده
منابع مشابه
Probabilistic algorithms for blind adaptive multiuser detection
In this paper, two probabilistic adaptive algorithms for jointly detecting active users in a DS-CDMA system are reported. The first one, which is based on the theory of hidden Markov models (HMM’s) and the Baum–Wech (BW) algorithm, is proposed within the CDMA scenario and compared with the second one, which is a previously developed Viterbi-based algorithm. Both techniques are completely blind ...
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The decorrelating detector and the linear minimum mean-square error (MMSE) detector are known to be effective strategies to counter the presence of multiuser interference in code-division multiple-access channels; in particular, those multiuser detectors provide optimum near-far resistance. When training data sequences are available, the MMSE multiuser detector can be implemented adaptively wit...
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This paper illustrates the use of “averaging” to improve the convergence rate of adaptive sign regressor and sign error multiuser detectors. The ingenious concept of averaging was invented by Polyak in 1990 – this paper analyses the performance of averaging in the sign error and sign regressor adaptive blind multiuser detection algorithms in DS/CDMA Systems.
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In this paper, two probabilistic adaptive algorithms for jointly detecting active users in a DS-CDMA system are compared. The rst one, which is based on the theory of Hidden Markov Models (HMM) is proposed within the CDMA scenario and compared with the previously developed Viterbi-based algorithm. Both techniques are completely blind in the sense that no knowledge of the signature sequences, ch...
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Direct adaptive realizations of the linear minimum mean-square error (MMSE) receiver for direct-sequence code-division multiple access possess the attractive feature of not requiring any explicit information of interference parameters such as timing, amplitudes, or spreading sequences; however, they need a training sequence for the desired user. Recently, a new blind adaptive receiver was propo...
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ژورنال
عنوان ژورنال: IEEE Transactions on Signal Processing
سال: 1998
ISSN: 1053-587X
DOI: 10.1109/78.726809