BER analysis of underlay relay cognitive networks with imperfect Nakagami-m fading channel information

2014 ◽  
Author(s):  
Khuong Ho-Van
Keyword(s):  
Fading Channel ◽  
Cognitive Networks ◽  
Channel Information ◽  
Ber Analysis

scholarly journals On the performance of cooperative cognitive networks with selection combining and proactive relay selection

2015 ◽  
Vol 18 (3) ◽  
pp. 29-38
Author(s):  
Khuong Van Ho ◽  
Son Que Vo ◽  
Tra Thanh Luu ◽  
Lien Hong Pham
Keyword(s):  
System Performance ◽  
Relay Selection ◽  
Performance Enhancement ◽  
Cognitive Networks ◽  
Selection Combining ◽  
Performance Limits ◽  
Significant Performance ◽  
Channel Information ◽  
Maximum Transmit Power ◽  
Proactive Relay Selection

This paper proposes an outage analysis framework for cooperative cognitive networks with proactive relay selection and selection combining (SC) under licensed outage constraint, maximum transmit power constraint, independent non-identical (i.n.i) fading distributions, erroneous channel information, and licensed users’ interference. Towards this end, we firstly suggest power allocation for unlicensed transmitters to satisfy power constraints and account for erroneous channel information and licensed users’ interference. Then, we propose an exact closed-form outage probability formula for the unlicensed network to promptly evaluate system performance and provide useful insights into performance limits. Multiple results show performance trade-off between the unlicensed network and the licensed network, error floor in the unlicensed network, considerable system performance degradation owing to erroneous channel information and licensed users’ interference, and significant performance enhancement due to the increase in the number of relays.

Sign in / Sign up

Export Citation Format

Share Document