Low Overhead Cyclostationary Signatures Based on Hopping Subcarrier in OFDM-Based Dynamic Spectrum Access Networks

In this paper, we propose a novel method to generate the cyclostationary signature for Orthogonal Frequency Division Multiplexing (OFDM) signals with a low overhead of signature (i.e. number of signature subcarriers) and a good performance of the signature detection under frequency-selective fading channel, for dynamic spectrum access (DSA) networks. Moreover, we also present how to employ the proposed method to detect the embedded signature. Simulations are conducted to make a comparison of the detection performance between the proposed method and the Sutton method. Relying on single hopping subcarrier to generate the signature, the overhead of the proposed method is only one fourth that of the Sutton method in our example. Nevertheless, the simulation results showed that the detection performance of the proposed method is no worse than that of the method proposed by Sutton.