This work proposes constrained constant modulus unscented Kalman filter(CCM-UKF) algorithm and its low-complexity version called reduced-rank constrained constant modulus unscented Kalman filter(RR-CCM-UKF) algorithm ...This work proposes constrained constant modulus unscented Kalman filter(CCM-UKF) algorithm and its low-complexity version called reduced-rank constrained constant modulus unscented Kalman filter(RR-CCM-UKF) algorithm for blind adaptive beamforming. In the generalized sidelobe canceller(GSC) structure, the proposed algorithms are devised according to the CCM criterion. Firstly, the cost function of the constrained optimization problem is transformed to suit the Kalman filter-style state space model. Then, the optimum weight vector of the beamformer can be estimated by using the recursive formulas of UKF. In addition, the a priori parameters of UKF(system and measurement noises) are processed adaptively in the implementation. Simulation results demonstrate that the proposed algorithms outperform the existing methods in terms of convergence speeds, output signal-tointerference-plus-noise ratios(SINRs), mean-square deviations(MSDs) and robustness against steering mismatch.展开更多
Matrix Converter(MC),a direct AC-ACconverter which is capable of bidirectional powerflow,unity input power factor control and efficiencyimprovement.Thus,it is more suitable for integrationof motor machine and power el...Matrix Converter(MC),a direct AC-ACconverter which is capable of bidirectional powerflow,unity input power factor control and efficiencyimprovement.Thus,it is more suitable for integrationof motor machine and power electronics systems.This paper investigated a novel generationsystem,which is composed of hybrid excitedsynchronous generator(HESG)and matrix converter(MC),as shown in Fig.1.Owing to the voltage clampcircuit,this structure waived an external DC sourcecommonly used for the excitation for HESG.Thevoltage clamp circuit shared a DC bus with afull-bridge converter and the excitation winding ofHESG is directly connected to the output of thefull-bridge converter achieving a bidirectional currentflow.展开更多
基金Project(61573113)supported by the National Natural Science Foundation of ChinaProject(2014RFXXJ074)supported by the Science and Technology Innovation Talents Research Fund of Harbin,China
文摘This work proposes constrained constant modulus unscented Kalman filter(CCM-UKF) algorithm and its low-complexity version called reduced-rank constrained constant modulus unscented Kalman filter(RR-CCM-UKF) algorithm for blind adaptive beamforming. In the generalized sidelobe canceller(GSC) structure, the proposed algorithms are devised according to the CCM criterion. Firstly, the cost function of the constrained optimization problem is transformed to suit the Kalman filter-style state space model. Then, the optimum weight vector of the beamformer can be estimated by using the recursive formulas of UKF. In addition, the a priori parameters of UKF(system and measurement noises) are processed adaptively in the implementation. Simulation results demonstrate that the proposed algorithms outperform the existing methods in terms of convergence speeds, output signal-tointerference-plus-noise ratios(SINRs), mean-square deviations(MSDs) and robustness against steering mismatch.
文摘Matrix Converter(MC),a direct AC-ACconverter which is capable of bidirectional powerflow,unity input power factor control and efficiencyimprovement.Thus,it is more suitable for integrationof motor machine and power electronics systems.This paper investigated a novel generationsystem,which is composed of hybrid excitedsynchronous generator(HESG)and matrix converter(MC),as shown in Fig.1.Owing to the voltage clampcircuit,this structure waived an external DC sourcecommonly used for the excitation for HESG.Thevoltage clamp circuit shared a DC bus with afull-bridge converter and the excitation winding ofHESG is directly connected to the output of thefull-bridge converter achieving a bidirectional currentflow.
