A Tuned-RF Duty-Cycled Wake-Up Receiver with -90 dBm Sensitivity

Area of Science:

• Electrical Engineering
• Computer Engineering
• Wireless Communication

Background:

• Wireless Sensor Networks (WSNs) require energy-efficient communication protocols.
• Conventional duty-cycling methods in WSNs can be inefficient, especially in low-traffic conditions.
• Ultra-low-power wake-up receivers (WuRx) offer a potential solution for reducing energy consumption.

Purpose of the Study:

• To introduce and analyze a novel ultra-low-power wake-up receiver (WuRx) for WSNs.
• To evaluate the energy efficiency and performance of the WuRx integrated with a modified medium access control (MAC) protocol.
• To demonstrate the practical feasibility of the proposed system through prototype realization.

Main Methods:

• Development of a novel wake-up receiver (WuRx) architecture.
• Modification of the medium access control (MAC) protocol to complement the WuRx.
• Analysis of energy models for duty-cycle-based communication.
• Experimental evaluation using a realized prototype.

Main Results:

• Achieved average power consumption as low as 3 μW with a 64-bit wake-up packet detection latency of 32 ms.
• Demonstrated scalable addressing capability (>512 bit) at a data rate of 128 kbit/s.
• Reached a detection sensitivity of -90 dBm at a wake-up packet error rate of 10⁻².
• Significant energy savings in low-traffic WSNs compared to conventional duty-cycling.

Conclusions:

• The proposed WuRx, combined with a modified MAC protocol, offers a practical solution for low-energy WSNs.
• The system provides substantial energy savings, particularly in scenarios with infrequent data transmission.
• The developed prototype validates the performance and potential of the novel wake-up receiver technology.