Multiantenna spectrum sensing of a second-order cyclostationary signal

We consider spectrum sensing of a second-order cyclostationary signal received at multiple antennas. The proposed detector exploits both the spatial and the temporal correlation of the received signal, from knowledge of the fundamental period of the cyclostationary signal and the eigenvalue multiplicities of the temporal covariance matrix. All other parameters, such as the channel gains or the noise power, are assumed to be unknown. The proposed detector is shown numerically to outperform state-of-the-art detectors for spectrum sensing of an OFDM signal, both when using a single antenna and with multiple antennas.