Autonomous laser diagnostics system for optical heterodyne frequency-shift-keyed communication systems

1987 ◽  
Author(s):  
V. JAYARAMAN
Keyword(s):  
Frequency Shift ◽  
Communication Systems ◽  
Laser Diagnostics ◽  
Optical Heterodyne ◽  
Diagnostics System

Methods for improving the accuracy of frequency shift estimation in 5G NR

2021 ◽  
Author(s):  
Vladimir Sergeevich Milyutin ◽  
Eugeniy Vasilevich Rogozhnikov ◽  
Kirill Petrovskiy ◽  
Dmitriy Pokamestov ◽  
Edgar Dmitriyev ◽  
...  
Keyword(s):  
Frequency Shift ◽  
High Frequency ◽  
Communication Systems ◽  
Wide Frequency Range ◽  
Wireless Communication Systems ◽  
Frequency Synchronization ◽  
Frequency Range ◽  
Transmission Rates ◽  
Synchronization Accuracy ◽  
High Order Modulation

Abstract Frequency synchronization is a necessary operation for all wireless communication systems. Due to the wide frequency range defined for 5G NR systems, this procedure becomes critical. To ensure high transmission rates and the use of high-order modulation, up to 256 QAM for 5G communication systems, it is necessary to ensure high frequency synchronization accuracy. In this article, we have reviewed various approaches to implementing frequency synchronization and proposed, in our opinion, the most effective method for correcting the frequency shift of the signal.

A Lower Frequency Shift Based on Mode Conversion for Optical Heterodyne Micro-Vibration Measurement

2020 ◽  
Vol 38 (21) ◽  
pp. 6057-6062
Author(s):  
Longkun Zhang ◽  
Jiafeng Lu ◽  
Linghao Meng ◽  
Peikang Cheng ◽  
Wenlin Li ◽  
...  
Keyword(s):  
Frequency Shift ◽  
Mode Conversion ◽  
Vibration Measurement ◽  
Optical Heterodyne ◽  
Micro Vibration

Optical Evaluation of Directly Injected Methane Using a Newly Developed Highly Repetitive Laser Diagnostics System

2019 ◽  
Author(s):  
Mirko Geiger ◽  
Lukas Schroeder ◽  
Christian Zoellner ◽  
Dieter Brueggemann ◽  
Juergen Goldluecke lng ◽  
...  
Keyword(s):  
Laser Diagnostics ◽  
Diagnostics System
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