Performance Investigation of Long Term Evolution- LTE- Based on OFDM Using QPSK & 64 QAM
Jaskaran Singh,
Tania Sharma,
Gaurav Soni
Issue:
Volume 6, Issue 4, December 2018
Pages:
69-74
Received:
10 January 2018
Accepted:
26 March 2018
Published:
24 December 2018
DOI:
10.11648/j.iotcc.20180604.11
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Abstract: Long Term Evolution (LTE) based on OFDM technology is popular 3rd Generation Partnership Project that dominates the 4th generation of mobile telecommunication network. In this paper our work is unique in providing a detailed performance study based on NI VST 5644. Our performance study includes TDD and FDD operation modes for uplink and downlink transmission in physical channel, data modulation, EVM, SEM etc. In this paper LTE performance is being evaluated using VST with QPSK, QAM modulation schemes.
Abstract: Long Term Evolution (LTE) based on OFDM technology is popular 3rd Generation Partnership Project that dominates the 4th generation of mobile telecommunication network. In this paper our work is unique in providing a detailed performance study based on NI VST 5644. Our performance study includes TDD and FDD operation modes for uplink and downlink tr...
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Locate Objects Mechanical Damage Based on Fiber-Optic Communication Systems
Ziyadullayev Zukhriddin Ilxom Ugli,
Qudratova Mekhriniso Ne'mat Qizi,
Orziyev Bakhodir Normurodovich,
Baratova Zakhro Akmaljon Qizi
Issue:
Volume 6, Issue 4, December 2018
Pages:
75-78
Received:
21 December 2018
Accepted:
5 January 2019
Published:
23 January 2019
DOI:
10.11648/j.iotcc.20180604.12
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Abstract: This work is devoted to the development of a method for monitoring the stability of hydraulic structures (dams), which created a monitoring system, operator can make a conclusion about the reliability of controlled structures as well as data on the level of protection facilities and experimental results are presented. Currently, optical fiber is widely used in fiber-optic communication systems, however, the quality of the fiber depends strongly signaling bandwidth capacity. Existing methods and devices for mechanical damage, disorders, defects do not allow a sufficient accuracy to identify such disadvantages as a change in signal characteristics of the inverter output photocurrents receiving diodes amplifier due to the different characteristics of the emitters and receivers, the difference in the optical coordination receivers and emitters fiber etc.
Abstract: This work is devoted to the development of a method for monitoring the stability of hydraulic structures (dams), which created a monitoring system, operator can make a conclusion about the reliability of controlled structures as well as data on the level of protection facilities and experimental results are presented. Currently, optical fiber is wi...
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