TY - JOUR
T1 - Spectrum Sensor Employing Continuous Pilot Tones in Cognitive Radio Systems
AU - Chin, Wen Long
N1 - Funding Information:
This work was supported by the Ministry of Science and Technology, Taiwan, under Grant 105-2221-E-006-019-MY2.
Publisher Copyright:
© 2017 IEEE.
PY - 2017
Y1 - 2017
N2 - Despite the promising role of orthogonal frequency-division multiplexing (OFDM) in communication systems, the optimal and practical spectrum sensing of OFDM signals for cognitive radio systems over multipath fading channels remains an important and challenging issue. This paper presents the Neyman-Pearson detection scheme of OFDM signals employing continuous pilot subcarriers. Since there are many unknown parameters in the Neyman-Pearson detector to be resolved, we also present a generalized log-likelihood ratio test (GLRT) spectrum sensor. The considered problem is complex and leads to a joint detection and estimation problem. The proposed GLRT spectrum sensor only needs received samples. Moreover, the proposed GLRT spectrum sensor is robust to the frequency selectivity of fading channels and symbol timing offset and carrier frequency offset. Simulations confirm the advantages of the proposed detector.
AB - Despite the promising role of orthogonal frequency-division multiplexing (OFDM) in communication systems, the optimal and practical spectrum sensing of OFDM signals for cognitive radio systems over multipath fading channels remains an important and challenging issue. This paper presents the Neyman-Pearson detection scheme of OFDM signals employing continuous pilot subcarriers. Since there are many unknown parameters in the Neyman-Pearson detector to be resolved, we also present a generalized log-likelihood ratio test (GLRT) spectrum sensor. The considered problem is complex and leads to a joint detection and estimation problem. The proposed GLRT spectrum sensor only needs received samples. Moreover, the proposed GLRT spectrum sensor is robust to the frequency selectivity of fading channels and symbol timing offset and carrier frequency offset. Simulations confirm the advantages of the proposed detector.
UR - http://www.scopus.com/inward/record.url?scp=85028353059&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85028353059&partnerID=8YFLogxK
U2 - 10.1109/ACCESS.2017.2694449
DO - 10.1109/ACCESS.2017.2694449
M3 - Article
AN - SCOPUS:85028353059
SN - 2169-3536
VL - 5
SP - 8444
EP - 8450
JO - IEEE Access
JF - IEEE Access
M1 - 7900350
ER -