An Ultra Low Power Wakeup Receiver for Wireless Sensor Nodes

Durante, Marco; Mahlknecht, Stefan

doi:10.1109/sensorcomm.2009.34

Cited by 57 publications

(55 citation statements)

References 4 publications

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“…The WUR solutions are based on variety of different receiver architectures [7]: matched filter [11], radio frequency envelope detection (RFED) [12][13][14][15][16][17][18][19][20][21], uncertain intermediate frequency (U-IF) [22,23], sub-sampling [24,25], superregenerative oscillator (SRO) [8,9,26], and injection locking [27−29]. The design involves many tradeoffs; therefore, it is not straightforward to define, which architecture is best suited for a WUR.…”

Section: Related Work Of Wake-up Receiversmentioning

confidence: 99%

On the human body communications: wake-up receiver design and channel characterization

Petäjäjärvi

Mikhaylov

Vuohtoniemi

et al. 2016

J Wireless Com Network

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By modulating the electric field induced to a human body, it is possible to transfer data wirelessly using the body as a transmission medium. This method is referred to as human body communication (HBC), which has multiple advantages in comparison with the traditional radio frequency (RF) communication. First, it alleviates the traffic load from the radio channels, which are becoming more and more congested, as the number of connected wireless devices increases rapidly. Second, HBC can potentially provide higher security than traditional RF communication since the electric field stays in the vicinity of a human body, which makes eavesdropping more challenging. Third, the attenuation in the HBC frequency band is lower than in bands used by the other radio technologies for wireless body area networks. To improve energy efficiency in HBC, one approach is to utilize a wake-up receiver (WUR). The WUR is continuously listening for a pre-defined wake-up signal, which activates the other electric circuitry (e.g., sensing, processing, and communication). The use of WURs can significantly reduce the energy consumption and increase the lifetime of the sensing applications. In this work, we propose a superregenerative WUR solution which employs self-quenching and loose synchronization method and operating at sufficiently low (1.25 kbps) data rate in order to obtain high sensitivity while keeping the energy consumption low. This enables to achieve sensitivity of −97 dBm for 10 −3 bit error rate while consuming only 40 μW. The details of the design and the performance evaluation results of the proposed solution are in the paper. Also, the paper reports the results of the practical measurements characterizing the impact of the electrode location on the path loss in an HBC channel. The presented results show that the proposed system can potentially enable communication between two any points on the body with low transmit power.

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Section: Related Work Of Wake-up Receiversmentioning

confidence: 99%

On the human body communications: wake-up receiver design and channel characterization

Petäjäjärvi

Mikhaylov

Vuohtoniemi

et al. 2016

J Wireless Com Network

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“…In the proposed architecture, to realize the periodogram estimate and channel selection, additional power is consumed. Envelope detectors can consume a power below 1.5µW for state-of-the-art designs [16]. On the other hand, for the conventional method, these steps are done digitally using different algorithms with different complexity orders, as discussed in Section I.…”

Section: B Power Consumption Comparison: Conventional Vs Proposedmentioning

confidence: 99%

Low-power architecture for wideband spectrum sensing

Chepuri

Francisco

Leus

2012

2012 3rd International Workshop on Cognitive Information Processing (CIP)

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Abstract-In this paper, a novel power efficient architecture for detecting the spectral holes over a very high bandwidth is proposed. Wideband spectrum sensing poses serious challenges for low-power spectrum sharing radios (for e.g., cognitive radio) which cannot afford to use high-rate Analog-to-Digital Converters (ADCs) to sample the signals at Nyquist rate and process them digitally thereby spending a lot of power. Here we propose an analog/mixed signal topology for wideband spectrum sensing that replaces the conventional Nyquist ADCs and digital Fast Fourier Transform (FFT) core with a bank of Sample and Hold (S/H) circuits, each operating at sub-Nyquist rate, and an all-analog FFT processor. The results show that even though sub-optimal analog processing leads to worse spectral reconstruction compared to conventional techniques, good detection performances can be achieved along with a substantial reduction in the power consumption.

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“…Depending on the application, this WUR could wake-up either the main radio directly or through a microcontroller. Several designs of such WUR could be found in the literature [11][12][13][14][15][16]. However, most of the time, the WUR is realized with a custom ASIC that is very expensive for low volume applications.…”

Section: Introductionmentioning

confidence: 99%

“…We also suggest using an asynchronous design that matches the nature of the wakeup signal. For [11][12][13][14]16], the digital demodulator is synchronous, which is inefficient during inactive phases. It could have been possible to use clock gating like in [17,18], but it would have required extra circuitry such as timer and signal detection to trigger the start of the WUR.…”

Section: Introductionmentioning

confidence: 99%

Modeling, design and implementation of a low-power FPGA based asynchronous wake-up receiver for wireless applications

Pons

Brault

Savaria

2013

Analog Integr Circ Sig Process

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Power consumption is a major concern for wireless sensor networks (WSNs) nodes, and it is often dominated by the power consumption of communication means. For such networks, devices are most of the time battery-powered and need to have very low power consumption. Moreover, for WSNs, limited amount of data are periodically sent and then the radio should be in idle or deep sleep mode most of the time. Thus using event-triggered radios is well suited and could lead to significant reduction of the overall power consumption of WSNs. Therefore this paper explores the design of an asynchronous module that can wake up the main receiver when another node is trying to send data. Furthermore, we implement the proposed solution in an FPGA to decrease the fabrication cost for low volume applications and make it easier to design, re-use and enhance. To decrease the static power consumption, we explore the possibility of reducing the supply voltage. The observed overall power consumption is under 5 lW at 250 kbps. Moreover, using a new asynchronous design technique, we observed that power consumption can be further reduced.

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An Ultra Low Power Wakeup Receiver for Wireless Sensor Nodes

Cited by 57 publications

References 4 publications

On the human body communications: wake-up receiver design and channel characterization

On the human body communications: wake-up receiver design and channel characterization

Low-power architecture for wideband spectrum sensing

Modeling, design and implementation of a low-power FPGA based asynchronous wake-up receiver for wireless applications

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