TY - GEN
T1 - Copula-Based Cooperative Sensing of OFDM Signals in Cognitive Radios
AU - Singh, Akhil
AU - Chokkarapu, Sai Praneeth
AU - Chaudhari, Sachin
AU - Varshney, Pramod K.
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/1
Y1 - 2020/1
N2 - This paper proposes the use of copula theory for cooperative spectrum sensing (CSS) of orthogonal frequency-division multiplexing (OFDM) based primary user (PU). A distributed detection model is assumed where secondary users (SUs) employ autocorrelation detectors (ADs) for the detection of a PU. In the presence of a PU, it is assumed that the observations across different SUs and subsequently the decision statistics are dependent. For the fusion of these dependent statistics, different copulas such as t-copula, Gaussian, Clayton and Gumbel are employed. In the presence of dependence among decision statistics, significant improvement in detection performance is observed while using copula theory instead of the traditional assumption of independence. Simulation results are presented to show the superiority of copula-based spectrum sensing.
AB - This paper proposes the use of copula theory for cooperative spectrum sensing (CSS) of orthogonal frequency-division multiplexing (OFDM) based primary user (PU). A distributed detection model is assumed where secondary users (SUs) employ autocorrelation detectors (ADs) for the detection of a PU. In the presence of a PU, it is assumed that the observations across different SUs and subsequently the decision statistics are dependent. For the fusion of these dependent statistics, different copulas such as t-copula, Gaussian, Clayton and Gumbel are employed. In the presence of dependence among decision statistics, significant improvement in detection performance is observed while using copula theory instead of the traditional assumption of independence. Simulation results are presented to show the superiority of copula-based spectrum sensing.
KW - Autocorrelation detector
KW - cognitive radio
KW - cooperative spectrum sensing
KW - copula
KW - dependence
UR - http://www.scopus.com/inward/record.url?scp=85082166215&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85082166215&partnerID=8YFLogxK
U2 - 10.1109/COMSNETS48256.2020.9027401
DO - 10.1109/COMSNETS48256.2020.9027401
M3 - Conference contribution
AN - SCOPUS:85082166215
T3 - 2020 International Conference on COMmunication Systems and NETworkS, COMSNETS 2020
SP - 446
EP - 451
BT - 2020 International Conference on COMmunication Systems and NETworkS, COMSNETS 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2020 International Conference on COMmunication Systems and NETworkS, COMSNETS 2020
Y2 - 7 January 2020 through 11 January 2020
ER -