Title:

Performance of Hybrid Sensing Method in Environment with Noise Uncertainty, Journal of Telecommunications and Information Technology, 2018, nr 1

Creator:

Kosmowski Krzysztof ; Kustra Mateusz ; Suchański Marek

Subject and Keywords:

WiMAX ; OFDM ; noise uncertainty ; Covariance Absolute Value ; Cyclic Autocorrelation Function ; hybrid detector ; SNR wall

Description:

The paper presents a novel hybrid spectrum sensing method used in cognitive radio and presents a hybrid detector (HD) which improves the sensing performance. The proposed HD takes advantage of the energy detection (ED) principle and a method based on Covariance Absolute Value (CAV), as well as on Cyclic Autocorrelation Function (CAF). The paper shows the limitations of using ED, resulting from the uncertainty of spectral density of noise power estimation, known as the SNR wall. The paper describes a system model and presents simulation results for the OFDM signal of a WiMAX-based communications system. The simulation results refer to an ideal environment with well-known parameters, and to an environment with uncertain spectral density of noise power estimation.

Publisher:

National Institute of Telecommunications

Date:

2018

Resource Type:

artykuł

Format:

application/pdf

Resource Identifier:

ISSN 1509-4553, on-line: ISSN 1899-8852

Source:

Journal of Telecommunications and Information Technology

Language:

ang

Rights Management:

Biblioteka Naukowa Instytutu Łączności