Super-regenerative receiver at 433 MHz

Carmo, J. P.; Ribeiro, José Carlos Rabelo; Mendes, Paulo; Correia, J. H.

doi:10.1016/j.mejo.2011.02.009

Cited by 7 publications

(1 citation statement)

References 25 publications

(26 reference statements)

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“…Note that since the SRO is located at the front-end of the SWUR, the SotA superregenerative receivers (e.g., in [26,46,54,55]) employ the isolation amplifier to amplify incoming signal and to prevent undesired emission from the SRO towards the electrode/antenna. In our design, this amplifier is intentionally omitted since we assume that the low SRO oscillation amplitudes may efficiently reduce the level of undesired emissions.…”

Section: Methodsmentioning

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: Methodsmentioning

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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A fully digital open‐loop clock and data synchronizer for ultra‐low power super‐regenerative receivers

Abbaszadeh

Jalali

2022

Circuit Theory & Apps

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In this paper, a clock and data synchronizer (CDS) is presented to improve channel selectivity of digitally assisted super-regenerative receivers (SRRs).The proposed CDS performs phase and frequency adjustment of the quench signal using a fully digital open-loop architecture removing the need for conventional phase-locked loop (PLL) architectures. The required signal shaping of the recovered data is also performed by the proposed CDS to restore the nonreturn-to-zero data format without using any pulse width expander or sample and hold circuit. A multichannel SRR is implemented employing the proposed CDS where a Q-enhancement procedure is also adopted to further improve the channel selectivity. The proposed SRR operates at 2.4-GHz ISM band and supports a data rate of 1 Mb/s, while the sensitivity is about À88 dBm, and the selectivity is better than À18 dB at a 10-MHz offset frequency. Implemented using a 0.18-μm standard CMOS process and with a 1.1-V supply voltage, the proposed SRR consumes about 0.4 mW.

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Super-Regenerative Receiver with TSPC Divide-by-8 Frequency Pulse for Multi-sensor Applications

Lai

Jang

Tatel

2019

2019 IEEE International Conference on Industrial Cyber Physical Systems (ICPS)

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Super-regenerative receiver at 433 MHz

Cited by 7 publications

References 25 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

A fully digital open‐loop clock and data synchronizer for ultra‐low power super‐regenerative receivers

Super-Regenerative Receiver with TSPC Divide-by-8 Frequency Pulse for Multi-sensor Applications

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