Passive Primary Receiver Detection for Underlay Spectrum Sharing in Cognitive Radio

2014 ◽  
Vol 21 (5) ◽  
pp. 564-568 ◽  
Author(s):  
Guodong Zhao ◽  
Wuyu Shi ◽  
Liying Li ◽  
Shaoqian Li
Keyword(s):  
Cognitive Radio ◽  
Spectrum Sharing ◽  
Primary Receiver ◽  
Underlay Spectrum Sharing

Cognitive Impulse Ultra Wide Band Spectrum Sharing Radio and Pulse Shaping

2013 ◽  
Vol 385-386 ◽  
pp. 1610-1613
Author(s):  
Feng Shan Zhang ◽  
Cai Feng Liang
Keyword(s):  
Cognitive Radio ◽  
Spectrum Sharing ◽  
Pulse Shaping ◽  
Wide Band ◽  
Ultra Wide Band ◽  
Band Spectrum ◽  
Advantages And Disadvantages ◽  
Radio Technology ◽  
Radio Systems ◽  
Underlay Spectrum Sharing

Both underlay spectrum sharing radios and overlay spectrum sharing radios have their advantages and disadvantages. Ultra wide band (UWB) and cognitive radio (CR) are important underlay and overlay technology respectively used as secondary radio systems. In this paper, a cognitive impulse ultra wide band (CIUWB) spectrum sharing radio technology is presented based on impulse UWB and CR.

scholarly journals Dual Analysis of the Capacity of Spectrum Sharing Cognitive Radio with MRC under Nakagami-m Fading

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
Phillip Babatunde Oni ◽  
Ruifeng Duan ◽  
Mohammed Elmusrati
Keyword(s):  
Cognitive Radio ◽  
Spectrum Sharing ◽  
Transmission Rate ◽  
Ergodic Capacity ◽  
Maximal Ratio Combining ◽  
Effective Capacity ◽  
Dual Analysis ◽  
Primary Receiver ◽  
Diversity Technique

In this study, the maximum achievable information transmission rate of spectrum sharing cognitive radio with maximal ratio combining (MRC) antenna diversity technique is investigated when the channel between the secondary transmitter and the primary receiver and that between the secondary transmitter and the secondary receiver suffer Nakagami-m fading. With an assumption that both channels encounter Nakagami-m fading and the transmission of the secondary transmitter is subject to average interference power constraint, the approximated expressions for analyzing the effective capacity and the ergodic capacity of cognitive radio users with MRC are presented. The two capacity models are compared. In the case of the effective capacity, it is shown that different applications or users with different quality of service (QoS) requirements can be supported in cognitive radio, and when the delay QoS decreases, the effective capacity approaches the ergodic capacity.

Bidirectional AF Relaying With Underlay Spectrum Sharing in Cognitive Radio Networks

2017 ◽  
Vol 66 (3) ◽  
pp. 2367-2381 ◽  
Author(s):  
Saeed Vahidian ◽  
Ehsan Soleimani-Nasab ◽  
Sonia Aissa ◽  
Mahmoud Ahmadian-Attari
Keyword(s):  
Cognitive Radio ◽  
Cognitive Radio Networks ◽  
Spectrum Sharing ◽  
Radio Networks ◽  
Af Relaying ◽  
Underlay Spectrum Sharing
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