Outage & diversity analysis of cooperative spectrum sharing protocol with decode-and-forward relaying

2015 ◽  
Author(s):  
Ankush Vashistha ◽  
Shubha Sharma ◽  
Vivek Ashok Bohara
Keyword(s):  
Spectrum Sharing ◽  
Diversity Analysis ◽  
Decode And Forward ◽  
Cooperative Spectrum Sharing

Cooperative spectrum sharing systems with relay selection in the presence of multiple primary receivers

2014 ◽  
Vol 8 (4) ◽  
pp. 546-553 ◽  
Author(s):  
Francisco Rafael Vasconcelos Guimarães ◽  
Mustapha Benjillali ◽  
George K. Karagiannidis ◽  
Theodoros A. Tsiftsis ◽  
Daniel Benevides da Costa
Keyword(s):  
Spectrum Sharing ◽  
Relay Selection ◽  
Multiple Primary ◽  
Cooperative Spectrum Sharing

scholarly journals Performance Analysis of Hybrid Radio Frequency and Free Space Optical Communication Networks with Cooperative Spectrum Sharing

Photonics ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 108
Author(s):  
Dong Qin ◽  
Yuhao Wang ◽  
Tianqing Zhou
Keyword(s):  
Radio Frequency ◽  
Communication Networks ◽  
Free Space ◽  
Spectrum Sharing ◽  
Cumulative Distribution ◽  
Free Space Optical ◽  
Secondary Users ◽  
Primary Users ◽  
Cooperative Spectrum Sharing ◽  
The Impact

This paper investigates the impact of cooperative spectrum sharing policy on the performance of hybrid radio frequency and free space optical wireless communication networks, where primary users and secondary users develop a band of the same spectrum resource. The radio frequency links obey Nakagami-m distribution with arbitrary fading parameter m, while the free space optical link follows gamma-gamma distributed atmospheric turbulence with nonzero pointing error. Because the secondary users access the spectrum band without payment, their behavior needs to be restricted. Specifically, the power of the secondary users is dominated by the tolerable threshold of the primary users. Considering both heterodyne and intensity modulation/direct detection strategies in optical receiver, the performance of optical relaying networks is completely different from that of traditional networks. With the help of bivariable Fox’s H function, new expressions for cumulative distribution function of equivalent signal to noise ratio at destination, probability density function, outage probability, ergodic capacity and symbol error probability are built in closed forms.

Cooperative Spectrum Sharing in OFDM Two-Way Relay Systems With Bidirectional Transmissions

2017 ◽  
Vol 21 (6) ◽  
pp. 1349-1352 ◽  
Author(s):  
Weidang Lu ◽  
Yingjun Angela Zhang ◽  
Mengyun Wang ◽  
Xin Liu ◽  
Jingyu Hua
Keyword(s):  
Spectrum Sharing ◽  
Relay Systems ◽  
Cooperative Spectrum Sharing

scholarly journals Performance Enhancement for Multihop Cognitive DF and AF Relaying Protocols under Joint Impact of Interference and Hardware Noises: NOMA for Primary Network and Best-Path Selection for Secondary Network

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Tran Trung Duy ◽  
Pham Thi Dan Ngoc ◽  
Phuong T. Tran
Keyword(s):  
Spectrum Sharing ◽  
Performance Enhancement ◽  
Path Selection ◽  
Secondary Source ◽  
Amplify And Forward ◽  
Decode And Forward ◽  
Transmit Power ◽  
Primary Network ◽  
Secondary Network ◽  
Relaying Protocols

In this paper, we propose and evaluate performance of multihop multipath underlay cognitive radio networks. In a primary network, an uplink nonorthogonal multiple access method is employed to allow primary transmitters to simultaneously transmit their data to a primary receiver. Using an underlay spectrum-sharing method, secondary source and secondary relays must adjust their transmit power to guarantee quality of service of the primary network. Under the limited transmit power, cochannel interference from the primary transmitters, and hardware noises caused by impairments, we propose best-path selection methods to improve the end-to-end performance for the secondary network. Moreover, both multihop decode-and-forward and amplify-and-forward relaying protocols are considered in this paper. We derive expressions of outage probability for the primary and secondary networks and propose an efficient method to calculate the transmit power of the secondary transmitters. Then, computer simulations employing the Monte-Carlo approach are realized to validate the derivations.

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