EDA-based joint power, subcarrier allocation and relay assignment scheme for multiuser relaying in OFDMA-based cognitive radio systems

2011 ◽  
Author(s):  
J.S. Oberoi ◽  
U. Pareek ◽  
M. Naeem ◽  
D.C. Lee
Keyword(s):  
Cognitive Radio ◽  
Subcarrier Allocation ◽  
Joint Power ◽  
Relay Assignment ◽  
Cognitive Radio Systems ◽  
Radio Systems ◽  
Assignment Scheme

Joint Power Allocation and Constellation Design for Cognitive Radio Systems

2018 ◽  
Vol 67 (5) ◽  
pp. 4661-4665 ◽  
Author(s):  
Taimour Aldalgamouni ◽  
Mehmet Cagri Ilter ◽  
Halim Yanikomeroglu
Keyword(s):  
Cognitive Radio ◽  
Power Allocation ◽  
Joint Power ◽  
Constellation Design ◽  
Cognitive Radio Systems ◽  
Radio Systems

Subcarrier Allocation in Cognitive Radio Systems

2012 ◽  
Vol 195-196 ◽  
pp. 154-158
Author(s):  
Pei Zhang ◽  
Long Xiang Yang ◽  
Xu Liu
Keyword(s):  
Resource Allocation ◽  
Cognitive Radio ◽  
Numerical Results ◽  
Total Power ◽  
Subcarrier Allocation ◽  
Allocation Algorithm ◽  
Cognitive Radio Systems ◽  
Radio Systems ◽  
And Performance ◽  
Cr System

In CR systems, resource allocation is very important, which can be operated by different rules, according to the different purposes. In this paper, we focus on subcarrier allocation in CR systems, where primary and CR users co-exist in adjacent bands, while keeping the total interference introduced to the PU band below a certain threshold and the total power allocated to the CR users under a constraint. First, we investigate Max-Rate subcarrier allocation algorithm (MaxR-SAA) which can achieve maximum transmit rate of the CR system. Then, focusing on the fact that the less interference introduced to the PU band, the better the PU can work; we proposed a Min-Interference subcarrier allocation algorithm (MinI-SAA). Further, aiming at achieving fairness among all the SUs, we propose a subcarrier allocation algorithm, which is termed as Fair-Rate subcarrier allocation algorithm (FairR-SAA). Numerical results are obtained for the behaviors and performance of our proposed algorithms.

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