Massive MIMO for RFID

用于 RFID 的大规模 MIMO

• 批准号: 2734021
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2734021
• 关键词: Massive; MIMO; RFID

Wireless IoT (internet of things) devices use very little power, with watchsized batteries capable of lasting a device's entire lifetime. Current wireless communication technology relies on duty cycling, which is both difficult to synchronise and power inefficient. Passive wake-up radio utilises a separate 'wake-up' packet sent alongside the data packets. The radio can then remain in deep-sleep until an incident wake-up packet has its RF energy harvested, and this energy can then switch the radio on and signal whether to transmit or receive data. Since the device spends most of its time in deep-sleep with this design, rather than duty cycling, it will result in significant power consumption improvements. However, it comes at the cost of lower receiver sensitivity and a current max wake-up range of ~10m, which is far too low to be viable for most IoT applications. To attempt to overcome this, we propose to use SAW (surface acoustic wave) devices within the wake-up radio architecture as a voltage multiplier. These devices have a very high gain & Q-factor, which will shift the radio design from broadband to narrowband. The project will investigate opportunities to improve the sensitivity/range of the wake-up passive radio through the process of designing, fabricating, and implementing SAW devices within the radio design. Alongside this, the project will require modification of current architecture to accommodate the new narrowband requirements presented.

无线物联网（物联网）设备使用非常少的电力，手表大小的电池能够持续设备的整个寿命。当前的无线通信技术依赖于占空比，这既难以同步又功率低效。被动唤醒无线电利用与数据包一起发送的单独的“唤醒”包。然后，无线电可以保持深度睡眠，直到事件唤醒数据包获得其RF能量，然后该能量可以打开无线电并发出是否发送或接收数据的信号。由于这种设计使器件大部分时间处于深度睡眠状态，而不是工作循环，因此将显著改善功耗。然而，它的代价是接收器灵敏度较低，当前最大唤醒范围约为10米，这对于大多数物联网应用来说太低了。为了试图克服这一点，我们建议使用SAW（表面声波）唤醒无线电架构内的设备作为电压倍增器。这些器件具有非常高的增益和Q因子，这将使无线电设计从宽带转向窄带。该项目将研究通过无线电设计中的SAW器件的设计、制造和实施过程来提高唤醒无源无线电的灵敏度/范围的机会。除此之外，该项目将需要修改当前的架构，以适应新的窄带要求。