Pseudonymetry: Precise, Private Closed Loop Control for Spectrum Reuse with Passive Receivers
Pseudonymetry: Precise, Private Closed Loop Control for Spectrum Reuse with Passive Receivers
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DOI：
10.1109/rfid54732.2022.9795976
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发表时间：
2022-05
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通讯作者：
Meles G. Weldegebriel;Jieran Wang;Ning Zhang;Neal Patwari;McKelvey
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作者：
Meles G. Weldegebriel;Jieran Wang;Ning Zhang;Neal Patwari;McKelvey
射电天文学和其他无源无线电频谱用户面临着避免无线通信系统干扰的重大挑战。即使是遥远的发射器有时也会干扰被动用户。我们提出了 Pseudonymetry，这是一个为（主要）被动用户提供一种关闭干扰其的特定（辅助）无线发射器的传输的方法的系统。通过控制特定的发射机而不是整个地理区域，假名技术可以增加无线系统可用的频谱，同时确保快速清除被动使用所需的干扰源。假名技术将低速率水印添加到辅助（预期）传输信号以携带随机、匿名假名。我们展示了无源接收器解码水印的能力，即使是从 SNR 非常低的接收信号中也是如此。无源接收器向中央数据库发送信息，向辅助发射器提供反馈，以便它们知道要腾出频段。我们提供的分析捕获了假名设计中的权衡，并显示了初步证据，表明简单的幅度调制水印方案可以在远处的无源接收器处实现可靠的检测，同时对预期辅助接收器的错误性能造成最小的降低。
Radio astronomy and other passive radio spectrum users have significant challenges avoiding interference from wireless communication systems. Even distant transmitters sometimes interfere with passive users. We propose Pseudonymetry, a system that provides (primary) passive users a means to turn off the transmissions of the particular (secondary) wireless transmitter that interferes with it. By controlling the specific transmitter rather than an entire geographical region, Pseudonymetry could increase the spectrum available for wireless systems while ensuring rapid clearing of interferers as necessary for passive use. Pseudonymetry adds a low rate watermark to the secondary (intended) transmitted signal to carry a random, anonymous pseudonym. We show the ability of a passive receiver to decode the watermark, even from a signal received with very low SNR. The passive receiver posts to a centralized database to provide feedback to the secondary transmitters so that they know to vacate the band. We provide analysis that captures the trade-offs in the design of Pseudonymetry, and show initial evidence that a simple amplitude modulation watermarking scheme could enable reliable detection at a distant passive receiver, while resulting in minimal degradation to the error performance of the intended secondary receiver.