A 152μW −99dBm BPSK/16-QAM OFDM Receiver for LPWAN Applications

Kosari, Avish; Moosavifar, Milad; Wentzloff, David D.

doi:10.1109/asscc.2018.8579346

Cited by 13 publications

(8 citation statements)

References 5 publications

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“…Since the weight of the payload has an upper limit of about 0.28g, we would like to consider carrying two functions with one transistor by the following two methods, and conduct verification experiments in the future. Many papers on techniques for multiplexing with one device and quadrature modulation have been published in the past [23][24][25][26][27][28][29][30][31][32][33][34][35].…”

Section: Multi-functionalization With Limited Weightmentioning

confidence: 99%

Technical Evaluation of Engineering Model of Ultra-Small Transmitter Mounted on Sweetpotato Hornworm

Nakajima¹,

Muraki²,

Mitsuhashi³

et al. 2022

J Multimed Inf Syst

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The authors are making a prototype flexible board of a radio-frequency transmitter for measuring an electromyogram (EMG) of a flying moth and plan to apply for an experimental station license from the Ministry of Internal Affairs and Communications of Japan in the summer of 2022. The goal is to create a continuous low-dose exposure standard that incorporates scientific and physiological functional assessments to replace the current standard based on lethal dose 50. This paper describes the technical evaluation of the hardware. The signal of a bipolar EMG electrode is amplified by an operational amplifier. This potential is added to a voltage-controlled crystal oscillator (27 MHz, bandwidth: 4 kHz), frequency-converted, and transmitted from an antenna about 10 cm long (diameter: 0.03 mm). The power source is a 1.55-V wristwatch battery that has a total weight of about 0.3 g (one dry battery and analog circuit) and an expected operating time of 20 minutes. The output power is −7 dBm and the effective isotropic radiated power is −40 dBm. The signal is received by a dual-whip antenna (2.15 dBi) at a distance of about 100 m from the moth. The link margin of the communication circuit is above 30 dB within 100 m. The concepts of this hardware and the measurement data are presented in this paper. This will be the first biological data transmission from a moth with an official license. In future, this telemetry system will improve the detection of physiological abnormalities of moths.

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Section: Multi-functionalization With Limited Weightmentioning

confidence: 99%

Technical Evaluation of Engineering Model of Ultra-Small Transmitter Mounted on Sweetpotato Hornworm

Nakajima¹,

Muraki²,

Mitsuhashi³

et al. 2022

J Multimed Inf Syst

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show abstract

“…(18) (19) using variable change u=tan(ᵩ/2) and with the assumption that the frequency of injected signal is within the bandwidth of injection-lock: (20) replacing in the equations above: (21) equation can be written as: (22) (23)…”

Section: Analysis Of Injected Signal Phase Change On Locking Timementioning

confidence: 99%

“…Sensor node is combined of sensing part, analog to digital converter (ADC), microprocessor, and transceiver [16][17][18][19]. The transceiver is a block with higher power consumption between other blocks, for this reason, design of transceiver of short range wireless is challenging [20,21]. Typically, Low power transceivers use modulations such as OOK, FSK, or PSK.…”

Section: Introductionmentioning

confidence: 99%

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A high efficiency BPSK receiver for short range wireless network

Yousefi¹,

Monfaredi²

2019

TELKOMNIKA

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In this paper, a 910MHz high efficiency BPSK receiver is presented with Colpitts oscillator for short range wireless network. In this research, with injection-lock technique and using Colpitts oscillator, the efficiency of receiver has been improved. And also, behavior of an oscillator under injection of another signal has been investigated. Also, variation of output signal amplitude versus injected signal phase variation, the effect of varying the amplitude of injected signal and quality factor of the oscillator has been investigated. The designed receiver has 0.474 mW dc power and -60 dBm sensitivity. Data rate of receiver is 5 Mbps. The FOM of receiver is 94 pJ/bit. This receiver was designed and simulated in 0.18 μm RFCMOS technology. This proposed receiver can be used in short range wireless network for example, Wireless Body array network and wireless sensor network.

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“…Real part of the impedance of the electrodes contributes to the thermal noise. The offset voltage in the high frequency part of the power spectrum is limited by the thermal noise which is always lower than 1/f noise [11]. Electrode noise is highly correlated to its dc offset voltage [12].…”

Section: Introductionmentioning

confidence: 99%

Development of an enhanced porosity AgAgCl reference electrode with improved stability

et al. 2019

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We have developed a new low-cost method for fabrication of an enhanced porosity ultra-low noise silver-silver chloride (Ag-AgCl) reference electrode with dramatically high stability, useful in precise electrochemical and biomedical measurements. Low noise level and high stability are the most important features when evaluating reference electrode for example when used as a half-cell at electrochemical cells. The noise was measured for bare Ag-AgCl electrode pairs in a saline electrolyte without any junction. The noise spectral density for such measurements increases at low frequencies due to flicker (1/f) noise. Thermal noise from the real part of the electrode impedance is always lower than 1/f noise and is shown as offset voltage in noise spectrum. Electrode noise is highly correlated to its offset voltage. Moreover, the variance of the potential difference in our measurements is correlated to the noise level of electrodes. In this paper, offset voltage spectrum and the variance of data while doing measurements are proposed for identification of noise in our electrodes. The results presented suggest a new low-cost process for fabrication of enhanced porosity reference electrodes with nanovolt noise level at 1 Hz, low enough for electrochemical and biomedical measurements.

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A 152μW −99dBm BPSK/16-QAM OFDM Receiver for LPWAN Applications

Cited by 13 publications

References 5 publications

Technical Evaluation of Engineering Model of Ultra-Small Transmitter Mounted on Sweetpotato Hornworm

Technical Evaluation of Engineering Model of Ultra-Small Transmitter Mounted on Sweetpotato Hornworm

A high efficiency BPSK receiver for short range wireless network

Development of an enhanced porosity AgAgCl reference electrode with improved stability

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