Optimum multiuser detection
نویسنده
چکیده
2
منابع مشابه
A New Algorithm for Multiuser DetectionBased on a Gradient Guided
| This paper introduces a new multiuser detection algorithm based on a gradient guided search that can achieve near-optimum performance while its implementation complexity is linear in the number of users. The new algorithm attempts to perform jointly optimum multiuser detection by updating one user's bit decision each iteration in the best possible way. When a decorrelating multiuser detector ...
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The prohibitive—exponential in the number of users—computational complexity of the maximum-likelihood multiuser detector for direct-sequence code-division multiple-access communications has fueled an extensive research effort for the development of low-complexity multiuser detection alternatives. In this letter, we show that we can efficiently and effectively approach the error rate performance...
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| The optimum multiuser detection problem was shown to be NP-hard i.e., its computational complexity increases exponentially with the number of users 1, 2]. In this paper, we show that the optimum multiuser detection problem for a synchronous CDMA system is equivalent to the minimum capacity cut problem in a related network and propose an optimum multiuser detection algorithm with polynomial co...
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In high dynamic conditions, using vector tracking loops instead of scalar tracking loops in GPS receivers is proved as an efficient method to compensate the performance. The Minimum Mean Squared Error detector as a multiuser detector is applied in the vector tracking loop for more reliability and efficiency. The Kalman filter does the two tasks of tracking and extracting the navigation data aft...
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In blind multiuser detection for CDMA systems, the receiver knows only the code of the user of interest, while in group-blind multiuser detection the receiver knows a subset of codes, e.g., the in-cell users in a basestation. This paper derives bounds for the performance of linear blind and group-blind multiuser detectors. The bounds are derived under a number of different system assumptions. T...
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We consider noncoherent multiuser detection techniques for a system employing nonlinear modulation of non-orthogonal signals. Our aim is to investigate near-optimum noncoherent multiuser detection techniques that utilize the received signal structure while retaining reasonable complexity. Near-optimum approximations of the maximum likelihood detector are investigated where the signal structure ...
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