物理层欺骗的基本速率限制
Fundamental Rate Limits of Physical Layer Spoofing
摘要：
这封信研究了一个新兴的无线通信干预问题，在物理层，一个合法的spokesman的目的是欺骗一个恶意链接从爱丽丝到鲍勃，通过替换爱丽丝的源消息与其目标消息在鲍勃侧。从信息理论的角度来看，我们感兴趣的特征最大可实现的欺骗率的这个新的欺骗信道，这是相当于在鲍勃的目标消息的最大可实现的速率，在条件下，鲍勃不能解码的源消息从爱丽丝。我们提出了一种新的组合欺骗的方法，其中的欺骗者发送自己的目标消息，结合源消息的处理版本，以取消源消息在鲍勃。对于这两种情况下，当鲍勃将干扰作为噪声（TIN）或应用连续干扰消除（SIC），我们获得最大可实现的欺骗率通过优化的目标和源消息之间的功率分配在欺骗。
英文摘要：
This letter studies an emerging wireless communication intervention problem at the physical layer, where a legitimate spoofer aims to spoof a malicious link from Alice to Bob, by replacing Alice's transmitted source message with its target message at Bob side. From an information-theoretic perspective, we are interested in characterizing the maximum achievable spoofing rate of this new spoofing channel, which is equivalent to the maximum achievable rate of the target message at Bob, under the condition that Bob cannot decode the source message from Alice. We propose a novel combined spoofing approach, where the spoofer sends its own target message, combined with a processed version of the source message to cancel the source message at Bob. For both cases when Bob treats interference as noise (TIN) or applies successive interference cancelation (SIC), we obtain the maximum achievable spoofing rates by optimizing the power allocation between the target and source messages at the spoofer.
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