Orthogonal frequency division multiple access-based cognitive radio networks with relaying capability

2010 ◽  
Vol 4 (4) ◽  
pp. 395 ◽  
Author(s):  
S. Golrezaei-Khuzani ◽  
M. Nasiri-Kenari
Keyword(s):  
Cognitive Radio ◽  
Cognitive Radio Networks ◽  
Multiple Access ◽  
Radio Networks ◽  
Frequency Division

scholarly journals Multiple Access in Cognitive Radio Networks: From Orthogonal and Non-Orthogonal to Rate-Splitting

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Safaa Gamal ◽  
Mohamed Rihan ◽  
Saleh Hussin ◽  
Adel Zaghloul ◽  
A. Abdelaziz Salem
Keyword(s):  
Cognitive Radio ◽  
Cognitive Radio Networks ◽  
Multiple Access ◽  
Radio Networks ◽  
Rate Splitting

scholarly journals Implementing a Flexible Testbed Using Dynamic FFR Scheme in OFDMA Based Cognitive Radio Networks

2021 ◽  
Author(s):  
Joydev Ghosh
Keyword(s):  
Cognitive Radio ◽  
Multiple Access ◽  
Network Performance ◽  
Carrier Frequency Offset ◽  
Analytical Framework ◽  
Radio Networks ◽  
Superior Performance ◽  
Frequency Division ◽  
Performance Parameters ◽  
Frequency Reuse Factor

<div>In this paper, the femtocell resource allocation in the Orthogonal Frequency Division Multiple Access (OFDMA) integrated cognitive radio (CR) networks has been demonstrated to optimize the network performance, while reducing the outage users at cell edges. The sub-band sharing flexibility not only improves the spectral efficiency of the dynamic FFR scheme against conventional approach but also it alleviates outage probability and further noticeable amount of improvement can be found in superior performance parameters such as capacity, CDF of SINR and overall cell throughput. We yield an analytical framework to ascertain the orthogonality of the subcarriers by compensating carrier frequency offset (CFO) to ensure better OFDMA performance in the proposed network model and illustrates the influence of frequency reuse factor (FRF) at cell edges via simulation results. </div>

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