TY - CONF T1 - Multiantenna detection of constant-envelope signals in noise of unknown variance T2 - IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC) Y1 - 2011 A1 - Daniel Romero A1 - R. López-Valcarce KW - cognitive radio KW - multiantenna detection KW - spectrum sensing AB -

Detection of unknown signals with constant modulus (CM) using multiple antennas in additive white Gaussian noise of unknown variance is considered. The channels from the source to each antenna are assumed frequency-flat and unknown. This problem is of interest for spectrum sensing in cognitive radio systems in which primary signals are known to have the CM property. Examples include analog frequency modulated signals such as those transmitted by wireless microphones in the TV bands and Gaussian Minimum Shift Keying modulated signals as in the GSM cellular standard. The proposed detector, derived from a Generalized Likelihood Ratio (GLR) approach, exploits both the CM property and the spatial independence of noise, outperforming the GLR test for Gaussian signals as shown by simulation.

JF - IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC) ER -