论文标题
无法检测到的无线电：在光谱面具约束下的秘密通信
Undetectable Radios: Covert Communication under Spectral Mask Constraints
论文作者
论文摘要
我们考虑在光谱面具约束下通过连续的时代添加剂白色高斯噪声（AWGN）通道的秘密通信问题，其中两个合法的政党在存在的窃听者存在下试图可靠地沟通，这应该无法估计是否发生通信。光谱掩模的约束被施加在超出感兴趣带宽之外的过度辐射。我们基于脉冲幅度调制（PAM），使用二元相移键（BPSK）和根凸起的余弦（RRC）载体脉冲来开发具有理论可靠性和遮盖力保证的通信方案。给定固定的传输持续时间t和带有带宽参数W的频谱掩码，我们表明一个人可以可靠，秘密地传输$ o（\ sqrt {wt}）$信息。我们表征了$ o $背后的常数，并表明它在某些条件下很紧。
We consider the problem of covert communication over continuous-time additive white Gaussian noise (AWGN) channels under spectral mask constraints, wherein two legitimate parties attempt to communicate reliably in the presence of an eavesdropper that should be unable to estimate if communication takes place. The spectral mask constraint is imposed to restrict excessive radiation beyond the bandwidth of interest. We develop a communication scheme with theoretical reliability and covertness guarantees based on pulse amplitude modulation (PAM) with Binary Phase Shift Keying (BPSK) and root raised cosine (RRC) carrier pulses. Given a fixed transmission duration T and a spectral mask with bandwidth parameter W, we show that one can reliably and covertly transmit $O(\sqrt{WT})$ bits of information. We characterize the constant behind the $O$ and show that it is tight under some conditions.
