scholarly journals A Novel Hybrid Multiple Access Scheme in Downlink for 4G Wireless Communications

2013 ◽  
Vol 1 (4) ◽  
pp. 103
Author(s):  
Poonam Singh
Keyword(s):  
Wireless Communications ◽  
Multiple Access ◽  
Access Scheme ◽  
4G Wireless ◽  
Hybrid Multiple Access

OFDM for 4G Wireless Communications

2018 ◽  
Vol 10 (1) ◽  
pp. 63-84 ◽  
Author(s):  
Saurabh Dixit ◽  
Himanshu Katiyar
Keyword(s):  
Wireless Communications ◽  
Outage Probability ◽  
Error Rate ◽  
Orthogonal Frequency Division Multiplexing ◽  
Ergodic Capacity ◽  
Error Rates ◽  
Fourth Generation ◽  
Closed Form Expression ◽  
Access Scheme ◽  
4G Wireless

Orthogonal frequency division multiplexing(OFDM) is the multiple access scheme for the fourth generation(4G) wireless communications. This paper analyzes the performance of OFDM through the Bit Error Rate(BER), Outage Probability, and ergodic capacity with flat delay profile as well as linearly increasing power decay factor. The probability density function(PDF) obtained in a Rayleigh fading channel is used to derive a closed-form expression for the outage probability, error rates and ergodic capacity of OFDM signals. The exact error rate values are similar to those obtained from simulation results. The performance improves with more number of channel taps

scholarly journals Collaborative Signal Multiple Access: A Robust Alternative to NOMA Using SIC

2021 ◽  
Author(s):  
Indu Shakya ◽  
Falah Ali
Keyword(s):  
Wireless Communications ◽  
Theoretical Analysis ◽  
Multiple Access ◽  
Numerical Results ◽  
Detection Technique ◽  
Access Scheme ◽  
User Interference

<p>This paper proposed a novel non-orthogonal multiple access scheme called CSMA that addresses some of critical shortcomings of NOMA that are the stumbling blocks for it to be considered an enabling technique for enhancing the capacity of 5G and 6G wireless communications. We provide some radical insights into the design of signals and detection technique for overcoming multi-user interference that makes it implementable in practice. We provide a sound theoretical analysis of its performance and validate the significance of numerical results.</p>

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