Quasi-Real-Time Wireless Communication Based on Wake-Up Receivers with a Latency Below 5 ms

Wake-up receivers (WuRxs) enable wireless sensor nodes to operate on battery power while maintaining efficient low-latency communication. Passive envelope detectors and low-frequency pattern matchers (LFPMs) are combined to design WuRxs working in the RF ranges. Recent publications have consistently demonstrated the effectiveness and reliability of this combination. Due to the modulation scheme employed, the wakeup packets (WuPts) used to activate the WuRxs are resistant to interference but tend to be complex and lengthy. None of the existing publications in this field have achieved a WuPt duration below 5 ms while retaining decent addressing capabilities. This article conducts a detailed analysis of the LFPMs' behavior and evaluates the performance of various WuPts. As a result, we propose two distinct solutions to reduce the WuPt duration to less than 5 ms, marking a 2.5-fold improvement compared to the current state of research.