A Terrestrial Digital Broadcasting and Positioning System Based on Overlap Communication

2014 ◽  
Vol 568-570 ◽  
pp. 1282-1286
Author(s):  
Guo Cheng Wu ◽  
Zhan Xin Yang ◽  
Wei Zhang Xu
Keyword(s):  
Communication Theory ◽  
Digital Transmission ◽  
Performance Degradation ◽  
Transmission System ◽  
Positioning System ◽  
Navigation Signal ◽  
Performance Deterioration ◽  
Digital Broadcasting ◽  
Simulation Results

Inspired by the overlap communication theory, a new onshore radio positioning system which superimposed on terrestrial digital transmission system is proposed in this paper. This system overlaps but not affects existing terrestrial digital broadcasting.At the receiver, a reconstruction/cancellation algorithm.is implied to capture the navigation signal and positioning measurements precisely.This paper focus on the construction of overlap system,spreading navigation signal and the capture of positioning measurements.We give a method to generate spreading navigation signal and overlap with terrestrial digital transmission system.The method can reduce the performance degradation due to pilot interference. We also proposes a reconstruction/cancellation algorithm which can solution the capture performance deterioration caused by overlapped system . The simulation results show that this system proposed in this paper can be used in terrestrial digital transmission system and provide good positional function.

Modeling and Simulation of Ship Motion for Dynamic Positioning Vessel

2014 ◽  
Vol 919-921 ◽  
pp. 2127-2130
Author(s):  
Pei Wen Yu ◽  
Hui Chen
Keyword(s):  
Modeling And Simulation ◽  
Wind Wave ◽  
Ship Motion ◽  
Dynamic Positioning ◽  
Positioning System ◽  
Dynamic Positioning System ◽  
Oil Supply ◽  
Mmg Model ◽  
Simulation Results

The paper presents a method to build MMG model of ship motion for a oil supply vessel (OSV) with dynamic positioning system. It is assumed that the ship motion exposed to environment disturbances like wind, wave & currents, The simulation results show that the model of the vessel and environment disturbances are suitable, and the method is practicable .

Modeling and Simulation of Electric Drive Bulldozer Based on the Torque Control

2013 ◽  
Vol 310 ◽  
pp. 236-239 ◽  
Author(s):  
Zhi Chao Zhou ◽  
Xiao Ling Chen ◽  
Yuan Zou
Keyword(s):  
Job Performance ◽  
Electric Drive ◽  
Performance Index ◽  
Slip Rate ◽  
Transmission System ◽  
Torque Control ◽  
Power Performance ◽  
Simulation Results ◽  
Operation Cycle ◽  
Ac Induction Motor

According to the power performance index of the bulldozer, the matching calculation of electric drive tracked bulldozer transmission system is put forward, including AC induction motor, reduction ratios between motors and sprockets, engine-generator. Combined with the slip rate simulation of the special operation cycle conditions of bulldozer eletromechanical transmission system based on Matlab/Simulink is performed. Simulation results show that the dynamic characteristic satisfy the requirements of the job performance of the bulldozer. The matching calculation of the eletromechanical transmission system for bulldozer proved itself to be effective and feasible.

Research of UHV DC Transmission Based on the Current Control

2011 ◽  
Vol 143-144 ◽  
pp. 19-23
Author(s):  
Hai Long Zhao ◽  
Zhong Ying Lin
Keyword(s):  
Transmission System ◽  
Current Control ◽  
Good Effect ◽  
Submarine Cable ◽  
Long Distance ◽  
Harmonic Control ◽  
Dc Power ◽  
Current Transmission ◽  
Simulation Results ◽  
Time Type

Compared with AC (alternating current) transmission, DC(direct current) transmission has obvious superiority at high power, long distance, submarine cable transmission and asynchronous interconnected between exchange systems etc.. This paper constructed a kind of 12 pulse bridge UHV DC transmission system that includes control protection function through MATLAB/Simulink tool. By setting the breaker parameters, this paper studied the 12 pulse bridge UHV DC transmission system AC/DC side in case of setting down time, type and cleared. The simulation results demonstrate that this system has a good effect in harmonic control and it has no power compensations in realizing HV DC process, and it can completely work as an important reference in constructing HV DC power grid.

800 Mbit/s Digital Transmission System Over Coaxial Cable

1983 ◽  
Vol 31 (2) ◽  
pp. 302-306 ◽  
Author(s):  
H. Kasai ◽  
K. Ohue ◽  
T. Hoshino ◽  
S. Tsuyuki
Keyword(s):  
Digital Transmission ◽  
Transmission System ◽  
Coaxial Cable

Study of Split Capacitor DAC Mismatch and Calibration in SAR-ADC

2016 ◽  
Vol 26 (01) ◽  
pp. 1750003
Author(s):  
Yun Zhang ◽  
Yiqiang Zhao ◽  
Peng Dai
Keyword(s):  
Calibration Method ◽  
Sar Adc ◽  
Calibration Error ◽  
Cmos Process ◽  
Analog To Digital ◽  
Significant Performance ◽  
Performance Deterioration ◽  
Conventional Structure ◽  
Split Capacitor ◽  
Simulation Results

Mismatch and parasitic effects of bridge capacitors in successive-approximation-register analog-to-digital converter’s (SAR-ADC) split capacitor digital-to-analog conversion (DAC) cause a significant performance deterioration. This paper presents a nonlinearity analysis based on an analytical model, and a modified calibration method utilizing a pre-bias bridge capacitor is accordingly proposed. The proposed method, which uses three-segment split capacitor DAC structure, can effectively eliminate over-calibration error caused by conventional structure. To verify the technique, a 14-bit SAR-ADC has been designed in 0.35-[Formula: see text]m 2P4M CMOS process with the PIP capacitor, and the simulation results show the method can further improve ADC performance.

Digital Transmission System.

1979 ◽  
Author(s):  
Manfred Unkauf ◽  
Paul Danis ◽  
Carl Alsmeyer
Keyword(s):  
Digital Transmission ◽  
Transmission System

scholarly journals Performance Comparison of Digitized Quaternion Modulation with other Modulation Schemes

2019 ◽  
Vol 27 ◽  
pp. 01004
Author(s):  
Anam Zahra ◽  
Qasim Umar Khan
Keyword(s):  
Global Positioning System ◽  
Gaussian Noise ◽  
Additive White Gaussian Noise ◽  
Performance Comparison ◽  
Superior Performance ◽  
Positioning System ◽  
Space Communication ◽  
Global Positioning ◽  
Simulation Results ◽  
Modulation Schemes

In wireless networks signal’s security from noise has been a very challenging issue, primarily because of the broadcast nature of communication. This paper focuses on digitized Quaternion Modulation (QM) which gives better performance as compared to QPSK, QAM and QFSK. We compare the performance of quaternion modulation with other modulation schemes in terms of BER using idealistic Additive White Gaussian Noise AWGN channel. This scheme can be used in applications such as Global Positioning System (GPS), satellite and space communication system to reduce errors. The simulation results show superior performance of the proposed digitized Quaternion Modulation over its counterparts. Thus one may trade off bandwidth for BER.

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