Algorithm Design and Implementation of Dynamic Star Simulator

2013 ◽  
Vol 722 ◽  
pp. 187-193
Author(s):  
Xiao Fang Zhao ◽  
Guang Bin Liu ◽  
Chao Shan Liu
Keyword(s):  
Traditional Method ◽  
Algorithm Design ◽  
Star Tracker ◽  
Simulation Algorithm ◽  
Arc Length ◽  
Visual Axis ◽  
Star Image ◽  
Design And Implementation ◽  
Simulation Testing ◽  
Celestial Sphere

In order to realize the simulation testing and calibration of star tracker in the lab, a simulation algorithm for dynamic and celestial sphere star image was proposed. This algorithm could complete simulation of star image at any time and any visual axis point, also could realize in-orbit simulation according to a given track. A new method of space district dividing was also presented in order to improve the traditional method of space district dividing by ascension and declination, fully considered declination arc length gradually shortened with latitude increasing. It can remarkably enhance the updating frequency simulation star image.

An Improved QPSK Signal's Algorithm Design and Simulation of its Modulation and Demodulation

2014 ◽  
Vol 912-914 ◽  
pp. 1146-1149
Author(s):  
Fan Zhou ◽  
Xin Xin Geng ◽  
Xiao Yu Zhang
Keyword(s):  
High Frequency ◽  
Satellite Communication ◽  
Algorithm Design ◽  
High Frequency Band ◽  
Signal Modulation ◽  
Software Simulation ◽  
Modulation And Demodulation ◽  
Modulation Mode ◽  
Depth Analysis ◽  
Simulation Testing

QPSK, a modulation mode with a high frequency band utilization ratio and a strong anti-noise immunity,is widely used in the field of military and satellite communication. This article based on the analysis of the traditional QPSK signal modulation and demodulation mechanism, proposes an improved QPSK signal modulation and demodulation algorithm, and have a further in-depth analysis of the feasibility of this algorithm. Finally, by MATLAB software simulation testing, simulation results shows that the algorithm can accurately generate a QPSK signal and complete a rapidly demodulation of a QPSK signal.

scholarly journals Design And Implementation Of Intelligent Fog Guidance System

2021 ◽  
Vol 257 ◽  
pp. 03072
Author(s):  
Hongmei Cui ◽  
Yahong Tan ◽  
Wenzhang Lin
Keyword(s):  
Traditional Method ◽  
Guidance System ◽  
The Road ◽  
Design And Implementation ◽  
Front End ◽  
Geographical Environment ◽  
Road Condition ◽  
Information Board

The fog-prone areas of expressway are mainly affected by special geographical environment, most of which occur in mountainous and hilly areas, lake depressions, remote suburbs and other places. The intelligent fog zone guidance system can automatically change the working mode according to the visibility of the environment. In addition, it can also communicate with the Information Board on the spot and announce the road condition ahead of time, so that vehicles can be reminded and guided at the front end of the road where the fog occurs and at the road where the fog occurs, which makes up for the deficiency of the traditional method.

scholarly journals Attitude-correlated frames adding approach to improve signal-to-noise ratio of star image for star tracker

2019 ◽  
Vol 27 (11) ◽  
pp. 15548 ◽  
Author(s):  
Yuanman Ni ◽  
Dongkai Dai ◽  
Wenfeng Tan ◽  
Xingshu Wang ◽  
Shiqiao Qin
Keyword(s):  
Signal To Noise Ratio ◽  
Star Tracker ◽  
Signal To Noise ◽  
Star Image ◽  
Noise Ratio

The Design and Implementation of Matlab Simulation in Optical Aberration

2014 ◽  
Vol 575 ◽  
pp. 541-544
Author(s):  
Zhen Hua Lao
Keyword(s):  
Programming Language ◽  
Spherical Aberration ◽  
Simulation Algorithm ◽  
Matlab Simulation ◽  
Parametric Variation ◽  
Design And Implementation ◽  
Optical Aberration ◽  
Aberration Theory

In the teaching of optical courses, the aberration knowledge is abstract and students often feel it difficult to understand. According to this phenomenon, a new simulation algorithm, which is based on the analysis of chromatic and spherical aberration theory, is described in this paper; with Matlab as the programming language, the emulation programs of chromatic and spherical aberration are designed and the simulation figures are presented, from which the effect of parametric variation on aberration can be shown vividly and intuitively. And for students, this will be helpful in the mastery of aberration knowledge.

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