OFDM is promising for underwater acoustic (UWA) communications due to its potential to combat the large delay spread. However, the performance of the OFDM system is seriously deteriorated by the inter-carrier interfer...
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ISBN:
(纸本)9781479982981
OFDM is promising for underwater acoustic (UWA) communications due to its potential to combat the large delay spread. However, the performance of the OFDM system is seriously deteriorated by the inter-carrier interference (ICI) caused by the transmitter/receiver motion and ocean waves. In this paper, we propose a novel ICI countermeasure. The key idea is to inactivate partial subcarriers according to index modulation and meanwhile transmit signals with opposite polarity on two adjacent active subcarriers for ICI self cancellation. Simulation results validate that the proposed scheme achieves much better bit error rate (BER) performance than many existing schemes in UWA communications.
A new knowledge-based Artificial Fish-swarm Algorithm (AFA) with crossover operator, namely CAFAC, is proposed to combat with the blind search of the original AFA. The crossover operator is explored, and the normative...
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During the practical production process, the soft sensors based on traditional single learning machine can not satisfied the needs of production. In this study, a multiple regression machine system (MRMS) is proposed ...
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Many power quality problems are generated by various electrical events (faults, disturbances, etc.). This paper presents the PC-08/104 equipment for monitoring and analysis of transient electrical events in power syst...
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Many power quality problems are generated by various electrical events (faults, disturbances, etc.). This paper presents the PC-08/104 equipment for monitoring and analysis of transient electrical events in power systems. It is a programmable electronic module which runs according to the signals provided by the transducers that take over the process parameters. PC-08/104 performs the acquisition of analog and digital inputs, local data storage, monitoring and processing, data transfer to an IBM-PC compatible computer and communication with the process server in a distributed data acquisition system. The program which runs on an IBM-PC compatible computer contains three sections: Monitoring (configuring all settable parameters of the equipment), Analysis (visualization of the input signals waveforms and the computation of several characteristic values) and Manager (management of records and archives). PC-08/104 provides an excellent tool to analyse the performance of the power system before, during and after a network disturbance situation. Some experimental results obtained using this equipment in energetic system are also presented in the paper.
In this paper, the Model-Free control (MFC) is used and tested on a Multi-Input-Multi-Output (MIMO) nonlinear system, which is a quadrotor vehicle. The system is decomposed into different-dependent Single-Input-Single...
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ISBN:
(纸本)9781479923779
In this paper, the Model-Free control (MFC) is used and tested on a Multi-Input-Multi-Output (MIMO) nonlinear system, which is a quadrotor vehicle. The system is decomposed into different-dependent Single-Input-Single-Output (SISO) sub-systems, where the MFC algorithm is applied on each one of them. MFC aims at compensating the time-varying disturbances and un-modeled system dynamics that the optimal feedback controller fails to cope with. A comparison between LQR feedback controller with and without the MFC will be implemented and tested on a real quadrotor vehicle. Different flight test results validate the importance of using the MFC, and its capability to control the quadrotor system that is using a degraded feedback controller, as well.
In this paper we study state-space realizations of Linear and Time-Invariant (LTI) systems. Motivated by biochemical reaction networks, Gonçalves and Warnick have recently introduced the notion of a Dynamical Str...
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In the paper predictive model reference control based on Laguerre network using the closed loop with integrator is presented. The performances of this control structure are compared with those of the internal model co...
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In the paper predictive model reference control based on Laguerre network using the closed loop with integrator is presented. The performances of this control structure are compared with those of the internal model control designed using the model reference control principle.
This paper proposes a novel Compressed Sensing Ensemble Classifier (CSEC) for human detection. The proposed CSEC employs the compressed sensing technique to get a more sparse model with a more reasonable selection of ...
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