论文标题
通过不完善的取消秘密通信
Covert Communications through Imperfect Cancellation
论文作者
论文摘要
我们提出了一种使用IEEE 802.11 OFDM/QAM数据包作为载体的秘密通信的方法。我们展示了如何隐藏秘密消息，以使传输信号不会违反标准指定的光谱掩码，并确定其对OFDM数据包错误率的影响。我们显示了隐藏信号不可用的条件，并且可以以可用的位错误率（BER）检索的条件。通过取消秘密接收器中的OFDM信号来提取隐藏信号。我们探讨了隐藏信号对OFDM参数估计和秘密信号BER的影响。我们通过使用802.11数据包的空中录音的实验结束，注入隐藏
We propose a method for covert communications using an IEEE 802.11 OFDM/QAM packet as a carrier. We show how to hide the covert message so that the transmitted signal does not violate the spectral mask specified by the standard, and we determine its impact on the OFDM packet error rate. We show conditions under which the hidden signal is not usable and those under which it can be retrieved with a usable bit error rate (BER). The hidden signal is extracted by cancellation of the OFDM signal in the covert receiver. We explore the effects of the hidden signal on OFDM parameter estimation and the covert signal BER. We conclude with an experiment using Over-The-Air recordings of 802.11 packets, inject the hidden
