A VCO-free low-power fully digital BPSK demodulator for implantable biomedical microsystems

Hosseinnejad, Mahdi; Erfanian, Abbas

doi:10.1109/icecs.2017.8292052

Cited by 7 publications

(3 citation statements)

References 15 publications

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“…Taking complexity and power consumption into consideration, we select amplitude shift keying (ASK) and binary phase shift keying (BPSK) as the simplest digital modulation techniques for load modulation in the mote, and Hamming (15,11) and Reed-Solomon (RS) (31,26) codes as short linear block codes for error-correction coding. The ASK and BPSK modulation schemes proposed can be implemented in µm scale [30], [31]. The data rate deployed depends on the application of the mote and the rate of sensor measurements.…”

Section: F Modulation and Error-correction Codingmentioning

confidence: 99%

Towards Microscale NFC-Enabled IoT Sensors: Physical and MAC Layer Design Analysis

2020

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Microscale sensors provide critical solutions in diverse fields, ranging from measurement, automation, and control in industrial, agricultural, and biomedical applications. However, their development is limited by many requirements and challenges, such as efficient powering and the selection of suitable wireless communication technologies. A number of wireless communication technologies have been deployed in these sensors, including terahertz (Thz) radio frequency and ultrasound. Designing sensors in micro-scale imposes challenges for any communication technique deployed. This paper investigates the use of magnetic induction-based backscatter communication in a microscale sensor. The aim here is to provide both physical and media access control (MAC) layer design analysis for a microscale mote that is powered inductively and communicates with a reader using backscattering. Magnetic induction-based communication and powering are demonstrated via analysis and simulation for the mote. Then, low-power modulation, error-correction coding, and suitable low-power MAC schemes with evidence of feasible implementation in microscale are explored. Results of the performance analysis indicate that the proposed design achieves communication at a range of at least a few centimeters (5−6 cm) with an acceptable bit error rate (BER). Finally, MAC layer analysis reveals the optimum number of motes to be deployed for various read delays and transmission rates. INDEX TERMS Microscale mote, near-field communication, IoT sensor, low-power modulation, resource-constrained MAC.

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Section: F Modulation and Error-correction Codingmentioning

confidence: 99%

Towards Microscale NFC-Enabled IoT Sensors: Physical and MAC Layer Design Analysis

2020

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“…The voltage clipper proposed in previous works 18,19 is used here to recover synchronous clock. The most advantages of the proposed DPSK are low power consumption and high area efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…The most advantages of the proposed DPSK are low power consumption and high area efficiency. The voltage clipper proposed in previous works 18,19 is used here to recover synchronous clock. The time domain analysis of the voltage clipper is presented in Hosseinnejad et al 18 The voltage mode analysis of the clipper is described in this study.…”

Section: Introductionmentioning

confidence: 99%

A DPSK demodulator for biomedical application

Hosseinnejad

Erfanian

Karami

2019

Circuit Theory & Apps

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In this study, a differential phase-shift-keying (DPSK) demodulator, which is implemented by digital circuit, is proposed. A differential voltage clipper is used to generate narrow pulses at the extremum of the received modulated signal. Regarding the DPSK signal, the outputs of the clipper have double frequency. In order to halve the frequency, a frequency divider is applied to get synchronous clock. Two binary counters are used to detect phase variation; the data are recovered after two times sampling. This technique removes the need for voltage controlled oscillator (VCO). The proposed demodulator is postlayout simulated in a 0.18-μm CMOS process, with a power of 64 μW and active area of 68 × 70 μm 2 . The demodulator recovers 10 Mb/s data rate at 10-MHz carrier frequency using a 1.8-V power supply.

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A CMOS low voltage, very low power fully differential orderly current buffer with ultra low input impedance and high CMRR

Azhari

Zareie

2019

Analog Integr Circ Sig Process

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A VCO-free low-power fully digital BPSK demodulator for implantable biomedical microsystems

Cited by 7 publications

References 15 publications

Towards Microscale NFC-Enabled IoT Sensors: Physical and MAC Layer Design Analysis

Towards Microscale NFC-Enabled IoT Sensors: Physical and MAC Layer Design Analysis

A DPSK demodulator for biomedical application

A CMOS low voltage, very low power fully differential orderly current buffer with ultra low input impedance and high CMRR

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