scholarly journals High Precision Self-Mixing Interferometer Based on Reflective Phase Modulation Method

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 204153-204159
Author(s):  
Liping Lu ◽  
Lu Hu ◽  
Zhen Li ◽  
Lirong Qiu ◽  
Wencai Huang ◽  
...  
Keyword(s):  
High Precision ◽  
Phase Modulation ◽  
Modulation Method

High Precision Even-power Phase Modulation Method For Self-Mixing Displacement Sensor Under Weak Feedback Regime

2021 ◽  
Author(s):  
Zhen Li ◽  
Qiu Lirong ◽  
Hu Lu ◽  
Lu Liping ◽  
Wencai Huang ◽  
...  
Keyword(s):  
High Precision ◽  
Phase Modulation ◽  
Displacement Sensor ◽  
Modulation Method

The Construction Basis of High-Precision Optical Range Finder GD-j1(l)

2018 ◽  
Vol 931 ◽  
pp. 681-686
Author(s):  
Hovsep S. Petrosyan ◽  
Yegisabeth H. Hayrapetyan ◽  
Hovnan A. Hunanyan
Keyword(s):  
High Precision ◽  
Linear Measurement ◽  
High Accuracy ◽  
Compensation Method ◽  
Interference Method ◽  
Modulation Method ◽  
Range Finder ◽  
Optical Range ◽  
Linear Measurements ◽  
Measurement Devices

The methods of construction of high-precision rangefinder on the modulation method, which will complement the means of linear measurements on the interference method, are considered. The linearly compensation method, which leads to the possibility of implementing range finders with an error of mφ=0.01 mm, is proposed as the basic constructions of extremely high accuracy linear measurement devices.

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.

Communication Periodic Phase Modulation Method for Fast Diagnosis of Phased Array

2020 ◽  
pp. 1-1
Author(s):  
Chong He ◽  
Bai Lin ◽  
Qun Chen ◽  
Anjie Cao ◽  
Jingfeng Chen ◽  
...  
Keyword(s):  
Phase Modulation ◽  
Phased Array ◽  
Modulation Method

scholarly journals An Optical Multifrequency Phase-Modulation Method Using Microbeads for Measuring Intracellular Oxygen Concentrations in Plants

2005 ◽  
Vol 89 (2) ◽  
pp. 1339-1345 ◽  
Author(s):  
Elmar Schmälzlin ◽  
Joost T. van Dongen ◽  
Ingo Klimant ◽  
Bettina Marmodée ◽  
Martin Steup ◽  
...  
Keyword(s):  
Phase Modulation ◽  
Modulation Method ◽  
Oxygen Concentrations
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