TY - GEN
T1 - Spectrum sensing in time-varying channels using multiple antennas
AU - Romero, Daniel
AU - Lopez-Valcarce, Roberto
PY - 2013/10/22
Y1 - 2013/10/22
N2 - The problem of detecting a Gaussian signal received with multiple antennas through a time-varying channel and corrupted by noise of unknown power is addressed by deriving the Generalized Likelihood Ratio test. The channel is described by means of a basis expansion model with deterministic unknown coefficients. Since the detection rule requires the knowledge of the Maximum Likelihood estimates of the channel and noise power, which lack closed-form expressions, an Expectation-Maximization algorithm is proposed to carry out such computation. Finally, simulations reveal that the proposed detector successfully exploits spatial correlation and time variation of the channel.
AB - The problem of detecting a Gaussian signal received with multiple antennas through a time-varying channel and corrupted by noise of unknown power is addressed by deriving the Generalized Likelihood Ratio test. The channel is described by means of a basis expansion model with deterministic unknown coefficients. Since the detection rule requires the knowledge of the Maximum Likelihood estimates of the channel and noise power, which lack closed-form expressions, an Expectation-Maximization algorithm is proposed to carry out such computation. Finally, simulations reveal that the proposed detector successfully exploits spatial correlation and time variation of the channel.
KW - Spectrum sensing
KW - cognitive radio
KW - detection theory
KW - time-varying channels
UR - http://www.scopus.com/inward/record.url?scp=84885807709&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84885807709&partnerID=8YFLogxK
U2 - 10.1109/SPAWC.2013.6612027
DO - 10.1109/SPAWC.2013.6612027
M3 - Conference contribution
AN - SCOPUS:84885807709
SN - 9781467355773
T3 - IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
SP - 135
EP - 139
BT - 2013 IEEE 14th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2013
T2 - 2013 IEEE 14th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2013
Y2 - 16 June 2013 through 19 June 2013
ER -