Results 171 to 180 of about 2,797,595 (206)
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Distributed multiuser detection
Conference Record of the Thirty-Third Asilomar Conference on Signals, Systems, and Computers (Cat. No.CH37020), 2003Multiuser detection is extended to distributed scenarios. Each cooperating receiver makes preliminary decisions on the received bits of multiple users based on its own observations. Then the preliminary decisions are combined at the fusion center to produce the final decision.
R.S. Blum, null Jun Hu
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A new approach to greedy multiuser detection
IEEE Transactions on Communications, 2002We propose a new suboptimum multiuser detector for synchronous and asynchronous multiuser communications. In this approach, a greedy strategy is used to maximize the cost function, the maximum-likelihood (ML) metric. The coefficients of the ML metric are utilized as weights indicating in which order bits can be estimated.
Amina AlRustamani, Branimir R. Vojcic
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Indecomposable error sequences in multiuser detection
IEEE Transactions on Information Theory, 2001Summary: We provide a graph-based characterization of the set of indecomposable sequences that are useful in the computation of an upper bound to error probability of maximum-likelihood detection in code-division multiple-access multiuser systems. We apply this characterization to a \(K\)-user symmetric system and to a two-user two-rate system.
Wei Luo, Anthony Ephremides
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Constrained minimum-BER multiuser detection
IEEE Transactions on Signal Processing, 1999A new linear multiuser detector that directly minimizes the bit-error rate (BER) subject to a set of reasonable constraints is proposed. It is shown that the constrained BER cost function has a unique global minimum. This allows us to develop an efficient Newton barrier method for finding the coefficients of the proposed detector using information ...
Xiaofeng Wang +2 more
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Feedback Quantum Neuron for Multiuser Detection
The 2006 IEEE International Joint Conference on Neural Network Proceedings, 2006Quantum neural network (QNN) is a promising area in the field of quantum computing and quantum information processing. A model of feedback quantum neuron (FQN) is proposed and its property is analyzed. A novel multi-user detector based on FQN and quantum register is proposed.
Fei Li +3 more
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Multiuser Detection Based on Grover's Algorithm
2006 IEEE International Symposium on Circuits and Systems, 2006The classical optimal solution of CDMA multi-user detection is consistent with the optimization of a quadratic function, and to find the optimum is a NP hard problem. Reducing the complexity of optimum based on quantum parallel computation is a new trend of multi-user detection techniques.
Shengmei Zhao, Jia Yao, Baoyu Zheng
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Belief Propagation for Coded Multiuser Detection
2006 IEEE International Symposium on Information Theory, 2006In this paper a simplified parallel belief propagation (BP) algorithm is suggested as a suboptimal soft-input soft-output multiuser detector in an iterative multiuser decoding scheme. The iterative decoding scheme itself is based on applying an outer BP algorithm for message passing between the BP multiuser detector and the single-user decoders.
Peng Hui Tan, Lars K. Rasmussen
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A constrained optimization approach to multiuser detection
IEEE Transactions on Signal Processing, 1997Interference cancellation or multiuser detection schemes are of great interest to the CDMA community because of their potential ability to treat the near-far problem and significantly reduce interference levels. A linear adaptive multiuser detection scheme based on constrained optimization is presented, constraints are constructed from knowledge of ...
Jeffrey B. Schodorf, Douglas B. Williams
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CDMA with multiuser detection vs. coding
Ninth IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (Cat. No.98TH8361), 2002This work deals with the asynchronous DS-CDMA reverse link with multiuser detection (MUD) receivers (two stages of parallel interference cancellation) the channel is multipath Rayleigh faded. The trade-off analysis between MUD and channel coding is the main topic.
Américo Correia +2 more
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On Optimal Detectors in Multiuser Detection Problems
Problems of Information Transmission, 2004This paper is a supplement to [Probl. Inf. Transm. 39, No. 2, 191--206 (2003); translation from Prob. Peredachi Inf. 39, No. 2, 36--52 (2003; Zbl 1077.94006)]. Necessary and sufficient conditions under which asymptotically optimal detectors are linear are given.
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