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The minimum mean square error (MMSE) algorithm can achieve the near-optimal detection performance in Massive MIMO system. However, it involves complicated matrix inversion. In this paper, a Chebyshev symmetrical successive over-relaxation iteration algorithm (CSSOR) based on the characteristic of channel hardening in massive MIMO system is proposed to avoid matrix inversion, whose the computational...
An improved nonlinear dynamic inverse guidance law is proposed for the problem of UAVs collision avoidance in this paper. First, a method based on collision cone boundary is investigated for collision detection. Second, an improved nonlinear dynamic inverse guidance law, which can be applied to multiple initial angles and speeds, is designed to ensure the security of UAVs collision avoidance. In addition,...
This paper discusses the scheme and design method for UCAV autonomous/semi-autonomous control system. According to the investigation of the traditional tactical flight maneuvers and the existing air combat simulators, a mission-oriented control scheme is proposed to fulfill the autonomous/semi-autonomous requirements. A library including 9 maneuvers is designed by which complex tasks could be formed...
This paper focuses on the near real-time implementation of end-to-end 3DTV System. It is specially designed for the generation of high-quality disparity map and depth-image-based rendering (DIBR) on the graphics processing unit (GPU) through CUDA (Compute Unified Device Architecture) API. We propose our novel methods including a kind of stereo matching with adaptive windows and an asymmetric edge...
A novel fiber Bragg grating acceleration sensor with high frequency in vertical direction and low frequency in horizontal direction based on a structure of stainless steel capillary is proposed. In vertical direction its resonant frequency can reach 2200Hz and in horizontal direction its sensitivity can reach 209pm/g so that we can change the direction of the capillary conveniently according to the...
In this study, we establish a numerical model and use computational fluid dynamics (CFD) analysis to measure peak pressure on the surface of filter bag. The numerical results are in good agreement with the experimental data during the pulse cleaning process. Peak pressure on the surface of filter bag, pressure rise rate and maximum reverse acceleration are used as evaluation indicators of bag-cleaning...
A new structure actuator for reducing coupling of bank-to-turn (BTT) missiles to is studied. The new structure actuator can roll independently along the longitudinal axis of the missile. Hence, the actuator instead of airframe needs to steer when controlling BTT missile rolling. So the rolling speed of main airframe is reduced, it can reduce coupling of missile introduced by airframe rolling. And...
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