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Base Station Cooperation (BSC), has been a promising technique for combating the Inter-Cell Interference (ICI) by exchanging information through a high-speed optical fiber back-haul to increase the diversity gain. In this paper, we propose a novel pilot symbol assisted data fusion scheme for Uplink BSC (UBSC). Furthermore, the proposed scheme exploits the pre-defined pilot symbols as the sample of...
This paper proposes a flux vector-based discrete-time direct torque control (DTC) scheme for salient-pole permanent-magnet synchronous generators (PMSGs) used in the variable-speed, direct-drive wind energy conversion systems (WECSs). The discrete-time control law is derived from the perspective of flux space vectors and load angle with the torque and stator flux information only. The saliency of...
This paper proposes a novel direct torque control (DTC) scheme to reduce the torque and stator flux ripples for permanent-magnet synchronous motor (PMSM) drives using a relatively low sampling frequency. Unlike the conventional DTC in which the voltage vectors are determined by hysteresis controllers, the proposed DTC uses nonlinear saturation comparators and a duty ratio modulation scheme for switch...
Lunar ascent guidance is one of the key points for future lunar sample return and manned missions. This paper discusses the practicability of using iterative guidance mode for lunar ascent. The lunar ascent in this paper begins with a vertical rise followed by a single axis rotation and then a guided phase. The three-dimensional equations of motion for lunar ascent are derived over a flat moon with...
The Minimum Bit Error Rate (MBER) detector is capable of outperforming the conventional Minimum Mean Squared Error (MMSE) detector by minimizing the Bit Error Rate (BER) directly. In this paper, We consider the MBER beamforming assisted multiple-antenna receiver for multi-user Quadrature Amplitude Modulation (QAM) systems. Particle Swarm Optimization (PSO) is then invoked for finding the optimum weight...
This paper proposes a space-vector modulation (SVM)-based direct-torque control (DTC) scheme for a permanent magnet synchronous generator (PMSG) used in a variable-speed direct-drive wind power generation system. A quasi-sliding-mode observer (QSMO) that uses a finite sampling frequency is proposed to estimate the rotor position and stator flux linkage based on the current model of the PMSG. The optimal...
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