Bit Error Rate Analysis of Cognitive Radio Network in the Presence of Primary Interference
Raj Kumar Samikkannu
Dr. Raj Kumar Samikkannu, Professor, Department of ECE, Malla Reddy Engineering College for Women, Hyderabad (Telangana), India.
Manuscript received on 30 September 2019 | Revised Manuscript received on 12 November 2019 | Manuscript Published on 22 November 2019 | PP: 1839-1843 | Volume-8 Issue-6S3 September 2019 | Retrieval Number: F13500986S319/19©BEIESP | DOI: 10.35940/ijeat.F1350.0986S319
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Abstract: In this paper, Bit Error Rate (BER) of Orthogonal Frequency Division Multiplexing (OFDM) based cognitive radio network is analyzed in the presence of Primary User Interference (PUI). Since, the PUI signal affects only few subcarriers of the OFDM signal, it can be modeled as a sparsity vector. In this network model, half duplex Amplify and Forward (AF) relaying is considered in the absence of direct link. Further, it is assumed that the network is operating in the overlay mode, thus the primary user transmitted signal act as interference at secondary user relay and destination nodes. In this paper, the PUI is mitigated using convex optimization. Bit Error Rate (BER) is analyzed using Quadrature Phase Shift Keying (QPSK) Modulation and Quadrature Amplitude Modulation (16-QAM). Simulation results conclude that after primary interference suppression, the performance of the proposed system is significantly improved.
Keywords: Cognitive Radio, OFDM, Amplify and Forward Relay and Primary User Interference.
Scope of the Article: Cognitive Radio Networks