Wireless signals are commonly used for communications. Emerging applications are giving new functions to wireless signals, in which wireless sensing is the most attractive one. Channel state information (CSI) is not only the parameter for channel equalization in communications but also the indicator for wireless sensing. However, due to the broadcast nature of wireless signals, eavesdroppers can easily capture legitimate user signals and violate user privacy by measuring CSI. Moreover, the advancement of hardware simplifies illegal eavesdropping since smart devices can track over-the-air signals through walls. Therefore, this work considers a waveform-defined privacy (WDP) solution that can hide CSI phase information and therefore protect user privacy. Besides, the proposed waveform solution achieves better performance due to the use of a unique modulation mechanism. Additionally, by tuning a waveform parameter, the waveform can also enhance communication security.
翻译：无线信号通常用于通信。 新兴应用给无线信号带来新的功能,其中无线遥感是最有吸引力的。 频道状态信息(CSI)不仅是频道通信均衡的参数,也是无线遥感的指标。 但是,由于无线信号的广播性质,窃听器可以很容易地捕捉合法的用户信号,并通过测量 CSI 来侵犯用户隐私。 此外,硬件的进步简化了非法窃听的功能,因为智能装置可以通过墙壁跟踪超空信号。 因此,这项工作考虑到一种波形定义的隐私(WDP)解决方案,它可以隐藏 CSI 阶段信息,从而保护用户隐私。 此外,由于使用独特的调制机制,拟议的波形解决方案可以取得更好的效果。 此外,通过调制波形参数,波形还能够加强通信安全。
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