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Evaluation of the Efficiency of Heat Exchanger Channels with Different Flow Turbulence Methods Using the Entropy Generation Minimization Criterion
Published 2024-12-01“…This paper presents the results of an optimization analysis of two types of thermal fluid channels. The selected geometries were evaluated according to the criterion of the Entropy Generation Minimization method as suggested by Adrian Bejan, with reference to a smooth pipe of the same diameter. …”
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Anti-interference algorithm of wireless channel for IoT communication
Published 2017-10-01“…In IoT communication,the anti-interference of wireless channel is influenced by various factors.Multi-antenna system has significant effect for promoting anti-interference of channel,whose complexity and performance in signal detection need further improvement.The QR decomposition detection algorithm in signal detection of multi-antenna system has low computational complexity,but the algorithm performance is poor.In order to improve the performance of QR decomposition detection algorithm,a QR decomposition algorithm based on ML criterion and decision candidate mechanism was proposed,and the performance of the algorithm was analyzed.The ML criterion was used to estimate the initial level of the detection,and a reliable decision was adopted in the other detection layer.Candidate points were introduced in unreliable case and the optimal candidate were selected from the feedback.The algorithm could significantly improve the system interference,and propagation error were greatly reduced in the decision feedback.The experimental results show that the proposed algorithm can improve the performance of the IoT system effectively with certain complexity.…”
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Best performance of the UNB modulation VMSK in AWGN channel
Published 2008-01-01“…Its performance in AWGN (added white Gaussian noise) channel is analyzed based on the classifier model for signal processing. …”
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Modes of gas motion in equivalent channel of regenerative heat exchanger
Published 2020-10-01Get full text
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Design of full-connected hybrid precoding based on an equivalent channel in millimeter-wave massive MIMO system
Published 2021-01-01Subjects: Get full text
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Extension of the Alberti-Uhlmann criterion beyond qubit dichotomies
Published 2020-02-01“…The Alberti-Uhlmann criterion states that any given qubit dichotomy can be transformed into any other given qubit dichotomy by a quantum channel if and only if the testing region of the former dichotomy includes the testing region of the latter dichotomy. …”
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Distance criterion-based quantizer design for cooperative spectrum sensing
Published 2018-09-01“…In terms of sensing node’s energy and reporting channel’s bandwidth constrains problem for cooperative spectrum sensing in cognitive radio networks,an optimal quantizer design method based on distance criterion was proposed.First of all,the Bhattacharyya distance of received quantized data at the fusion center (FC) was calculated as performance criteria,the optimization mathematical model of the quantizer was constructed,and the optimum quantization thresholds were obtained by using particle swarm optimization algorithm.According to received sensing nodes’ quantized data at the FC,a log-likelihood ratio detector was constructed to decide the presence or absence of primary user signal,the upper bound to sensing performance of energy detector that without quantization was derived.Compared with the existing methods in literatures,the performance of proposed 3-bit quantization method approaches to the upper bound performance of energy detector,under the premise of obtaining comparable detection performance,the requirement of communication bandwidth is reduced.…”
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Analytical Computation of Information Rate for MIMO Channels
Published 2017-01-01“…These features will improve accuracy for performance analysis with criterion of information rate.…”
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Distributed Channel-Aware Quantization Based on Maximum Mutual Information
Published 2016-05-01“…Using the mutual information as the design criterion, we can easily integrate the effect of communication channels in the design and consequently design channel-aware quantization rules. …”
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Fuzzy adaptive LS channel estimation for GO-MC-CDMA
Published 2011-01-01“…The channel frequency response was constructed by choosing a certain number of the first estimate value which was handled by FFT interpolation.Therefore,the model mismatch error could be compensated effectively.In addition,the relationship between the mean-squared error(MSE) and the number of chosen first estimate value was analyzed by consid-ering the influence of the noise on LS Estimation method.Thus,the optimal criterion for obtaining the optimum number of first estimate value was explored with a fuzzy algorithm.The simulations demonstrate that the fuzzy adaptive LS channel es-timation performs is much better than the traditional LS Channel Estimation and that it is more robust with noise.…”
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Blind equalization criteria for MIMO-FIR channels driven by colored signal
Published 2012-07-01“…In view of the statistic characteristics of the colored source,the law presented by the second and the fourth order correlative statistics of this kind of source is analyzed.A blind equalization criterion for MIMO-FIR channel was proposed,and the blind equalization algorithm based on this criterion was also constructed.The validity of the proposed algorithm is demonstrated by computer simulations.…”
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Quantitative analysis of the influence of asymmetric channel delay on relay protection's reliability
Published 2019-01-01“…The asymmetric delay of digital channels has negative effects on line current differential protection in a complex mechanism. …”
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Joint linear transceiver design over MIMO frequency selective channels
Published 2010-01-01“…The problem of joint linear spatial Tx-Rx design was investigated for multiple-antenna non-block transmission systems over frequency selective channels. A minimum mean square error (MMSE) criterion based linear transceiver was proposed. …”
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THE USE OF THE TEMPERATURE CRITERIA FOR OPTIMIZING THE GEOMETRY OF DEFORMING ZONES AND CALIBRATING CHANNEL WIRE
Published 2012-09-01“…The methods of optimization of the die channel geometry at wire drawing by the temperature criterion enabling to project geometry of deforming and calibrating zones of die are created.…”
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Compressive sensing based channel estimation for NC-OFDM systems in cognitive radio context
Published 2011-11-01“…A new channel estimation based on compressive sensing(CS)in non-contiguous orthogonal frequency division multiplexing(NC-OFDM)system was proposed.As for NC-OFDM systems in cognitive radio context,the infrastructure of CS-based channel estimation,the design of pilot patterns and the algorithm of channel estimation were explored.Especially,a criterion of optimizing pilot pattern in the CS-based channel estimation was proposed by minimizing the mutual coherence of the measurement matrix in CS theory.Simulations show that,under many patterns of deactivated subcarriers,CS-based channel estimation obtains much better performance than existing NC-OFDM channel estimation methods in terms of the mean square error of the channel estimate as well as the bit error rate of the system.…”
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Adaptive transmission scheme with delayed channel state information for multiuser MIMO-OFDM systems
Published 2008-01-01“…The scheme uses delayed channel state information from receivers to maximize the throughput. …”
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Construction and Capacity Analysis of High-Rank LoS MIMO Channels in High Speed Railway Scenarios
Published 2012-01-01“…The validity of the maximum capacity criterion applied to realize high-rank line-of-sight (LoS) multiple-input multiple-output (MIMO) channels is investigated for high speed railway scenarios. …”
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Joint space-time Huffman limited feedback precoding for spatially and temporally correlated MIMO channels
Published 2013-11-01“…In addition, in view of time correlation of channels, the scheme reduces the feedback data of channel state information (CSI) in the slow fad-ing channel by using neighborhood-based limited feedback. …”
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Energy-Efficient Compact Heat Exchangers Made of Porous Heat-Conducting Materials
Published 2018-07-01Get full text
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