Optimum Excitations for a Dual-Band Microwatt Wake-Up Radio
Optimum Excitations for a Dual-Band Microwatt Wake-Up Radio
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双频段微瓦唤醒无线电的最佳激励
DOI：
10.1109/tmtt.2016.2622699
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发表时间：
2016
影响因子：
4.3
通讯作者：
L. Benini
中科院分区：
文献类型：
--
作者：
M. del Prete;A. Costanzo;Michele Magno;D. Masotti;L. Benini
为了实现无线传感器网络的普遍利用，提出了半无源唤醒无线电（WuR），以最大限度地减少耗能的主通信无线电的活动时间。最具挑战性的功能是提高其灵敏度，这是接收器能够感测到的最弱激活信号，它受到基于二极管的检测器的最小开启电压的限制。为了在更低的功率水平下运行探测器，提出了一种优化调制 WuR 激励的策略，利用高峰值间歇连续波，同时保留所需的每比特平均功率。介绍了由双频段天线馈电并由 WuR 后端加载的超低功耗检测器的设计和实现：演示了同一 WuR 的 2.45 GHz 和 868 MHz 操作，并增加了不同通信频段之间的灵活性和互操作性。我们证明，正确的 WuR 激活是可能的，每位平均功率在 2.45 GHz 时低至 -63 dBm，在 868 MHz 时低至 -65 dBm。这通过实验室级设置进行了实验验证，并通过仅基于现成组件的系统实现进行了确认。
To enable pervasive exploitation of wireless sensor networks, semipassive wake-up radios (WuRs) are proposed to minimize the active time of the energy-hungry main communication radio. The most challenging feature is to enhance their sensitivity, the weakest activation signal the receiver is able to sense, which is limited by the minimum turn-on voltage of the diode-based detector. In order to operate the detector at even lower power levels, a strategy to optimize the modulated WuR excitations is presented, exploiting high-peak intermittent continuous waves while preserving the required average power per bit. The design and implementation of an ultralow-power detector, fed by a dual-band antenna and loaded by the WuR backend is presented: 2.45-GHz and 868-MHz operations of the same WuR are demonstrated, with added flexibility and interoperability among different communication bands. We show that a correct WuR activation is possible with an average power per bit as low as -63 dBm at 2.45 GHz and -65 dBm at 868 MHz. This is experimentally verified by a lab-level setup and confirmed by a system implementation based on off-the-shelf components only.