Optimal control time service system by using telephone line

2003 ◽  
Author(s):  
Yuan Haibo ◽  
By Yan ◽  
Feng Ping ◽  
He Kangyuan
Keyword(s):  
Optimal Control ◽  
Service System ◽  
Telephone Line ◽  
Time Service ◽  
Control Time

Sub-nanosecond one-way real-time time service system based on UTC

GPS Solutions ◽  
2021 ◽  
Vol 25 (2) ◽  
Author(s):  
Meifang Wu ◽  
Baoqi Sun ◽  
Yuanxin Wang ◽  
Zhe Zhang ◽  
Hang Su ◽  
...  
Keyword(s):  
Real Time ◽  
Service System ◽  
Time Service

scholarly journals Experimental Study of a Signal Modulation Method to Improve eLORAN Data Channel Communications

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6504
Author(s):  
Chaozhong Yang ◽  
Yulin Wang ◽  
Shifeng Li ◽  
Wenhe Yan
Keyword(s):  
Phase Modulation ◽  
Service System ◽  
Modulation Method ◽  
Pulse Modulation ◽  
Digital Modulation ◽  
Typical Application ◽  
Time Service ◽  
Data Channel ◽  
Modulation Coding ◽  
Modulation Methods

There are mainly two types of data modulation methods used for enhanced LOng-RAnge Navigation (eLORAN) systems: pulse position modulation (PPM) and supernumerary interpulse modulation (SIM). The typical application for PPM is tri-state PPM (3S-PPM), also known as Eurofix. The typical application for SIM is ninth pulse modulation. Both of these methods are phase modulation methods. Phase modulation coding, a very mature technology, is used at present. To achieve a better demodulation success rate of eLORAN digital modulation signals at longer distances, a method of using the transmitting station duplex mode to transmit a digital modulation pulse group after LORAN-C transmitting a pulse group is proposed to realize modulation pulse on–off modulation. In this method, a broadcasting experiment was performed on the BPL (The call sign of eLORAN time service system in China) broadcaster station. After monitoring, a good receiving demodulation effect was initially obtained.

Experimental results of a control time delay system using optimal control

2011 ◽  
Vol 33 (1) ◽  
pp. 100-113 ◽  
Author(s):  
Omar Santos ◽  
Liliam Rodríguez-Guerrero ◽  
Omar López-Ortega
Keyword(s):  
Optimal Control ◽  
Time Delay ◽  
Delay System ◽  
Experimental Results ◽  
Time Delay System ◽  
Control Time

scholarly journals SISTEM LAYANAN ANTAR PADA RESTORAN BERBASIS ANDROID

Compiler ◽  
2013 ◽  
Vol 2 (2) ◽  
Author(s):  
Endyatna Puthut Bagus Pratama ◽  
Sumarsono Sumarsono ◽  
Elizabeth Nurmiyati Tamatjita
Keyword(s):  
Operating System ◽  
Customer Satisfaction ◽  
Service System ◽  
Order System ◽  
Time Service ◽  
Delivery Service ◽  
Android Operating System ◽  
Customer Manager

The business restaurant is growing. In this fast business is need application mobile for customer satisfaction. This system his many applications. They are customer, manager, web kitchen and deliveryapplication. This application is using android Operating System. Using that application by maps for knowing the places o f customer. The results are 100% fo r delivery service, 93% to level o f effective and efficient, 97% to time service system and 97% o f delivery order system.

Research of Transport Stream and PCR Timestamp in the Satellite Digital TV Time Service System

2013 ◽  
Vol 411-414 ◽  
pp. 799-802
Author(s):  
Deng Pan ◽  
Yu Hua ◽  
Yu Xiang
Keyword(s):  
Delay Time ◽  
Time Synchronization ◽  
Service System ◽  
Digital Tv ◽  
Experimental Results ◽  
Time Service ◽  
Serial Interface ◽  
Transport Stream ◽  
Serial Data

The Satellite Digital TV Time Service is based on the DVB-S Satellite Digital TV system, using Program Clock Reference (PCR) in the MPEG-2 frame to capture timestamp and measure delay time. This paper, considering the PCR as the Time Synchronization Flag after researching Transport Stream (TS) frame and Asynchronous Serial Interface (ASI) in Satellite Digital TV system, recovers the asynchronous serial data from TS in Satellite Digital TV by oversampling technology. After that, PCR will be found from the recovered data, and the timestamp will be captured when PCR is detected. Finally, this method is tested by using E5710 Encoder and FPGA Cyclone II chip. The experimental results are satisfactory, and the precision of detecting bit synchronization excels 3.7ns.

Sign in / Sign up

Export Citation Format

Share Document