Optimum Multiuser Detector for Synchronous CDMA Systems
Antenna Diversity Assisted Genetic Algorithm Based Multiuser Detection Schemes for Synchronous CDMA Systems
... Genetic-Algorithm-Based Multiuser Detection Schemes for Synchronous CDMA Systems ...assisted multiuser code-division multiple-access detector based on genetic algorithms (GAs) is ...
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Genetic algorithm assisted Joint multiuser symbol detection and fading channel estimation for synchronous CDMA systems
... ML optimum multiuser ...symbol detector is capable of offering a higher throughput and a shorter detection delay than that of explicitly trained CDMA multiuser ...
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An Iterative Multiuser Detector for Turbo-Coded DS-CDMA Systems
... Cross-correlation = 0.3, frame length = 200, K = 10, 5 iterations. might be required for different types of signals. Puncturing can also be employed to differentiate classes of service by al- lowing users to transmit at di ...
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Performance of multiuser decision-feedback detector for flat Rayleigh fading synchronous CDMA channels
... We compare the decision-feedback detector with the conventional detector and the decorrelator. The average error rate of the conventional detector is evaluated using the result for distr[r] ...
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Design and Implementation of a Low Complexity Multiuser Detector for Hybrid CDMA Systems
... The paper is organized as follows: Section II describes the signal model used in hybrid CDMA systems and underlines the peculiarities due to the specific CWTS standard adopted. Section III introduces the ...
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Reduced Complexity Near Optimum Genetic Algorithm Assisted Multiuser Detection for Synchronous Multicarrier CDMA
... “Genetic algorithm assisted joint mul- tiuser symbol detection and fading channel estimation for syn- chronous CDMA systems:’ IEEE Joumal on Selected Areas in Communicarions. [r] ...
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Coding Across Multicodes and Time in CDMA Systems Employing MMSE Multiuser Detector
... 5. SIMULATION RESULTS Computer simulations have been done for a BPSK system. Signature sequences with processing gain N = 15 were gen- erated randomly and fixed. 1 The code rates of CCs were 1/n = 1/2, 1/3, and 1/4, and ...
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Multiuser Detection for Synchronous DS-CDMA in AWGN Channel
... linear multiuser detectors and non-linear detectors. In linear multiuser detection, a linear mapping (transformation) is applied to the soft outputs of the conventional detector to produce a new set ...
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Block Adaptive Kernel Based CDMA Multiuser Detector
... In our previous work [11],[12] the SVM technique [13]–[15] has been applied for constructing kernel-based MUDs. Our study has shown that an SVM aided MUD trained using a relatively small block of noisy received signal ...
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Genetic Algorithm Based Antenna Diversity Assisted Multiuser Detection for Synchronous CDMA Systems
... individuals are chosen for selection based on the concept of.. the so-called Pareto optimality , which uses the information.[r] ...
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Multiuser detection for frequency-nonselective fading synchronous CDMA channels
... The paper is arranged as follows. In section 2, we review the synchronous CDMA model and ~everal multiuser detector structures. In section 3, we formulate the signal model of the flat fa[r] ...
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A review on synchronous CDMA systems: optimum overloaded codes, channel capacity, and power control
... It can also be shown that that power estimation and control are possible for very highly overloaded systems. C Future works Research topics that can be considered for future works are as follows: Although, Section ...
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A Chip Level BSOR Based Linear GSIC Multiuser Detector for Long Code CDMA Systems
... incorporating multiuser detec- tors in current cellular systems is that the latter are long-code systems while most multiuser detectors developed until now assume a short-code system ...
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Near-Optimum Iterative Multiuser Detection in Time-Frequency-Domain Spread Multicarrier DS-CDMA Systems
... the optimum MUD and iterative TF-domain MUD using two iterations achieve nearly the same BER performance, which is very close to the single-user BER ...the optimum MUD. Specifically, the complexity of the ...
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Combined error correction and multiuser detection for Rayleigh fading synchronous CDMA channel
... We now study the important near-far situation where user 1's energy is, on average, equal to half the energies of the other three users. As expected, the conventional detec- tor's BER is extremely high. User 1's ...
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Performance evaluation of single user and multiuser CDMA Systems
... §6.2 MUKCIR Receiver Derivation 123 In this chapter we leverage these new approaches to propose a new m ultiuser detector to combat MAI in fast fading m ultipath channels. The MUKCIR receiver relies on the ...
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A novel interleaving scheme for multiuser detection of coded CDMA systems
... stage detector and show that it has very good performance over the fading channel and is robust against the "near-far" problem when error correction is ...coded systems and present a novel 'user' interleav- ...
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Signal and detector randomization for multiuser and multichannel communication systems
... 2.5 Concluding Remarks and Extensions The optimal power control with signal constellation randomization has been pro- posed for the downlink of a multiuser DS-CDMA system. After presenting a formulation for ...
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Probabilistic Neural Network Implementation of the Optimum CDMA Multi-user Detector * and Prof.
... in multiuser system is that the spread spectrum signals are made to pass through a filter matched to the desired signal, and then the decision is made directly ...in optimum receivers in multi-user ...
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Optimum Detection of CDMA
... for synchronous and asynchronous CDMA with Walsh-Hadamard Code or Pseudo random sequence as the spreading ...as detector followed by a syndrome decoder for BCH code in digital ...MUD detector ...
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