OFDM 动态频谱接入网络中基于跳频子载波的循环平稳签名

摘要

提出了一种在正交频分复用（orthogonal frequency division multiplexing，OFDM）信号中产生循环平稳签名的方法，该方法开销低，且在频率选择性衰落信道中仍然具备很好的可检测性，尤其适用于动态频谱接入（dynamic spectrum access，DSA）网络。此外，还给出了该循环平稳签名的检测方法。仿真结果表明，依靠单个跳频子载波产生的签名，在签名检测性能不恶化的情况下，其开销仅仅是萨顿方法的四分之一。%A novel method is proposed to generate a low overhead cyclostationary signature for orthogonal frequency division multiplexing (OFDM)signals.Moreover,a method to detect the embedded signature is also presented.Good performance of the signature detection under the frequency-selective fading channel is guaran-teed by the proposed signature signal especially for dynamic spectrum access(DSA)network.Simulations are conducted to make a comparison of the detection performance between the proposed method and the Sutton method.Relying on a single hopping subcarrier to generate the signature,the overhead of the proposed method is only one fourth that of the Sutton method in the example,and there is no loss of detection performance com-pared to the Sutton method.