Performance Comparison Between NOMA and OMA Relaying Protocols in Multi-Hop Networks over Nakagami-m Fading Channels under Impact of Hardware Impairments

2019 ◽  
Author(s):  
Phu Tran Tin ◽  
Nguyen Van Hien ◽  
Miroslav Voznak ◽  
Lukas Sevcik
Keyword(s):  
Fading Channels ◽  
Performance Comparison ◽  
Hardware Impairments ◽  
Relaying Protocols

Performance Comparison between DPSK and OQPSK modulation approaches in multi environments channels with Matlab Simulink models

2019 ◽  
Vol 7 (1) ◽  
pp. 30-39
Author(s):  
Fatima faydhe Al- Azzawi ◽  
Faeza Abas Abid ◽  
Zainab faydhe Al-Azzawi
Keyword(s):  
Phase Shift ◽  
Fading Channels ◽  
Additive White Gaussian Noise ◽  
Block Codes ◽  
Performance Comparison ◽  
Phase Shift Keying ◽  
Differential Phase Shift ◽  
Matlab Simulink ◽  
Communication Industry ◽  
Shift Keying

Phase shift keying modulation approaches are widely used in the communication industry. Differential phase shift keying (DPSK) and Offset Quadrature phase shift keying (OQPSK) schemes are chosen to be investigated is multi environment channels, where both systems are designed using MATLAB Simulink and tested. Cross talk and unity of signals generated from DPSK and OQPSK are examined using Cross-correlation and auto-correlation, respectively. In this research a proposed system included improvement in bit error rate (BER) of both systems in  the additive white Gaussian Noise (AWGN) channel, by using the convolutional and block codes, by increasing the ratio of energy in the specular component to the energy in the diffuse component (k) and  the diversity order BER in the fading channels will be improved in both systems.    

scholarly journals PERFORMANCE COMPARISON OF DUAL-BRANCH AND TRIPLE-BRANCH SELECTION DIVERSITY RECEIVER BASED ON DESIRED SIGNAL ALGORITHM OVER CORRELATED WEIBULL FADING CHANNELS

2017 ◽  
Vol 16 (1) ◽  
pp. 15
Author(s):  
Aleksandra Golubović ◽  
Nikola Sekulović ◽  
Mihajlo Stefanović ◽  
Dejan Milić
Keyword(s):  
Fading Channels ◽  
Performance Measure ◽  
Performance Comparison ◽  
Cochannel Interference ◽  
Selection Combining ◽  
Interference Signal ◽  
Weibull Fading ◽  
Weibull Fading Channels ◽  
Diversity Receiver ◽  
Correlated Weibull Fading

As an important performance measure, in this paper the outage probability of dual- and triple-branch selection combining (SC) diversity system is compared. The analyzed system works over correlated Weibull fading channels in the presence of cochannel interference (CCI) where the output signal choice is done using desired signal algorithm. Results are graphically presented showing the influence of number of diversity branches, correlation coefficient and ratio of average powers of desired and interference signal.

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