TY - GEN
T1 - Minimum-delay spectrum sensing for multi-band cognitive radios
AU - Kim, Seung Jun
AU - Li, Guobing
AU - Giannakis, Georgios B.
PY - 2010
Y1 - 2010
N2 - Spectrum sensing algorithms are developed for cognitive radios to support real-time traffic. Multiple bands are sensed in parallel to reduce sensing delay, while meeting a minimum rate requirement with a prescribed outage probability. Interference constraints are also imposed to protect primary user (PU) transmissions. Both fixed sample size (FSS) and sequential sensing algorithms are developed. In the FSS sensing, a series of convex feasibility problems are solved to minimize sensing delay. In the sequential case, a bank of sequential probability ratio tests (SPRTs) is employed to detect PU presence, where the detector parameters are optimized via convex optimization. Numerical tests demonstrate that the (average) sensing delay of sequential sensing is considerably smaller than that of FSS sensing.
AB - Spectrum sensing algorithms are developed for cognitive radios to support real-time traffic. Multiple bands are sensed in parallel to reduce sensing delay, while meeting a minimum rate requirement with a prescribed outage probability. Interference constraints are also imposed to protect primary user (PU) transmissions. Both fixed sample size (FSS) and sequential sensing algorithms are developed. In the FSS sensing, a series of convex feasibility problems are solved to minimize sensing delay. In the sequential case, a bank of sequential probability ratio tests (SPRTs) is employed to detect PU presence, where the detector parameters are optimized via convex optimization. Numerical tests demonstrate that the (average) sensing delay of sequential sensing is considerably smaller than that of FSS sensing.
UR - http://www.scopus.com/inward/record.url?scp=79551619398&partnerID=8YFLogxK
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U2 - 10.1109/GLOCOM.2010.5683914
DO - 10.1109/GLOCOM.2010.5683914
M3 - Conference contribution
AN - SCOPUS:79551619398
SN - 9781424456383
T3 - GLOBECOM - IEEE Global Telecommunications Conference
BT - 2010 IEEE Global Telecommunications Conference, GLOBECOM 2010
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 53rd IEEE Global Communications Conference, GLOBECOM 2010
Y2 - 6 December 2010 through 10 December 2010
ER -