Capacity analysis of the secondary users in spectrum sharing model over Nakagami- m and log-normal fading channels


Basgumus A., Ardic M. S., Namdar M.

JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, vol.38, no.4, pp.2205-2212, 2023 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 38 Issue: 4
  • Publication Date: 2023
  • Doi Number: 10.17341/gazimmfd.1111493
  • Journal Name: JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Art Source, Compendex, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.2205-2212
  • Keywords: Cognitive radio, ergodic capacity, Nakagami-m and log-normal, fading channels, spectrum sharing, COGNITIVE RADIO NETWORKS, POWER ALLOCATION, 5G
  • Bursa Uludag University Affiliated: Yes

Abstract

In this study, ergodic capacity performance for the secondary user is analyzed under the average received power constraint taking into account the effect of interference from the primary user in the spectrum sharing model for the cognitive radio network. With the capacity-maximizing water-filling solution and power allocation approach, the theoretical derivations for ergodic capacity are provided on Nakagami-m and log -normally distributed fading channels. The numerical results show that interference channels originating from the primary network have a significant impact on the capacity of the secondary user. Ergodic capacity performance for the secondary user is verified by Monte Carlo simulations, taking into account the fading parameter of the Nakagami distribution, the standard deviation of the log-normal distribution, and the Lagrange multiplier parameters that determine the optimum power of the secondary user.