An ultra-low power MEMS-based two-channel transceiver for wireless sensor networks

Otis, Brian; Chee, Y.H.; Lu, Richard; Pletcher, Nathan; Rabaey, Jan M.

doi:10.1109/vlsic.2004.1346487

Cited by 65 publications

(39 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It can be seen that a further reduction in the overall power consumption can be obtained by employing simpler modulation schemes together with dedicated technologies [14], [15] or by matching to high ohmic antennas [16] and using one-or two-channel communication links [14]- [17]. In this work, a primary goal was the robustness of the wireless link together with the low power consumption but employing standard technological solutions.…”

Section: Simulation and Experimental Resultsmentioning

confidence: 99%

A 1 mA Ultra-Low-Power FHSS TX Front-End Utilizing Direct Modulation With Digital Pre-Distortion

Lopelli

Tang

Roermund

2007

IEEE J. Solid-State Circuits

View full text Add to dashboard Cite

Abstract-This paper deals with the system and circuit-level aspects of an ultra-low-power robust wireless node for an asymmetric wireless link. A single building block TX front-end for a frequency hopping spread spectrum (FHSS) transmitter implemented in silicon-on-anything (SOA) bipolar technology is presented. It is realized with a directly modulated RF cascoded Colpitts power voltage-controlled oscillator (VCO), a frequency locked loop for center frequency calibration, and a digital pre-distortion algorithm for accurate frequency bins synthesis. The TX front-end draws only 1 mA at 18 dBm output power. By combining digital system techniques for frequency hopping and merging the VCO and the power amplifier (PA), a robust solution is obtained for indoor ultra-low-power wireless links. The proposed pre-distortion concept allows reduction of the hardware complexity, while the combination of a cascode output buffer and a common-collector Colpitts VCO allows us to reduce the complete FHSS front-end to a single building block that directly drives the antenna through a balun. A dedicated digital algorithm on the receiver side reduces the center frequency offset from a maximum value of 8.2 MHz to less than 8 ppm avoiding the use of any crystal on the transmitter side. Precision in the hopping synthesis is obtained by employing a ST-DFT based demodulator with differential encoding and an offset sending technique. The novel FHSS-predistortion concept has been verified by realizing a full wireless link that achieves a bit error rate better than 1.1% at 25 dBm output power while transmitting across an 8 meters indoor non-line-of-sight (NLOS) path.

show abstract

Section: Simulation and Experimental Resultsmentioning

confidence: 99%

A 1 mA Ultra-Low-Power FHSS TX Front-End Utilizing Direct Modulation With Digital Pre-Distortion

Lopelli

Tang

Roermund

2007

IEEE J. Solid-State Circuits

View full text Add to dashboard Cite

show abstract

“…At DC, M7 to M9 allow bias current to flow past the FBAR to the amplifier, but at RF frequencies, the gates are shunted to the supply by C3 to C5, maintaining a high small-signal output resistance across the FBAR [7].…”

Section: A Lna With Fbar Multiplexingmentioning

confidence: 99%

“…The receiver in [6] leveraged a Film Bulk Acoustic Resonator (FBAR) to provide much-improved channel filtering and a very low power design, but is inherently single-channel due to the small (less than 10MHz) effective tuning range of the resonator's parallel resonance. A two-channel tworesonator receiver has previously been presented in [7], but used envelope detection directly at RF, replicated downstream hardware, and consumed 50nJ/b. This paper presents a 2.4GHz NB receiver architecture with down-conversion before detection that achieves both sub-nJ/b energy efficiency and three-channel operation.…”

Section: Introductionmentioning

confidence: 99%

Multi-channel 180pJ/b 2.4GHz FBAR-based receiver

Nadeau

Paidimarri

Mercier

et al. 2012

2012 IEEE Radio Frequency Integrated Circuits Symposium

View full text Add to dashboard Cite

-A three-channel 2.4GHz OOK receiver is designed in 65nm CMOS and leverages MEMS to enable multiple sub-channels of operation within a band at a very low energy per received bit. The receive chain features an LNA/mixer architecture that efficiently multiplexes signal pathways without degrading the quality factor of the resonators. The single-balanced mixer and ultra-low power ring oscillator convert the signal to IF, where it is efficiently amplified to enable envelope detection. The receiver consumes a total of 180pJ/b from a 0.7V supply while achieving a BER=10 -3 sensitivity of −67dBm at a 1Mb/s data rate.Index Terms -Body sensor networks, CMOS, radio frequency integrated circuits, low power electronics, film bulk acoustic resonators, envelope detector.

show abstract

“…또한, 유비쿼터스를 필두로 한 무선 통신 기술의 다 분화로 저전력 무선 센서 기반의 energy scavenging 전력 생산 연구 [8] 와 집적 가능한 시스템 구조 연구가 이슈가 부각되고 있으며 [9] , 시스템 소형화 및 집적화 를 위한 RF 소자 설계 기술 [10], [11] …”

Section: 호 전송의 유일한 원거리 무선 전력 전송 방법으로 고려되어 다양한 설계 방법이 연구되어 왔다unclassified

Wake-Up Receiver System Design Using the DGS Rectenna

최태민¹,

이석재²,

이희종³

et al. 2012

The Journal of Korean Institute of Electromagnetic Engineering

View full text Add to dashboard Cite

In this paper, a new design of a planar rectenna system and its application to a wake-up receiver operating for incoming signal with a specified frequency are proposed for low-power sensor system applications. The planar and integrable rectenna system is designed with DGSs(Defected Ground Structures) at 2.4 GHz. The DGSs reject harmonic components of 4.8 and 7.2 GHz and eliminate 2.4 GHz fundamental frequency for DC-path filtering. The rectenna system has been evaluated for the conversion output voltages, and applied to the switching of a power supply at the low-power sensor receivers. The proposed system has been evaluated for the wake-up performance by testing a lownoise amplifier operation. From the experimental results, the proposed receiver system presents excellent operation performances.

show abstract

An ultra-low power MEMS-based two-channel transceiver for wireless sensor networks

Cited by 65 publications

References 4 publications

A 1 mA Ultra-Low-Power FHSS TX Front-End Utilizing Direct Modulation With Digital Pre-Distortion

A 1 mA Ultra-Low-Power FHSS TX Front-End Utilizing Direct Modulation With Digital Pre-Distortion

Multi-channel 180pJ/b 2.4GHz FBAR-based receiver

Wake-Up Receiver System Design Using the DGS Rectenna

Contact Info

Product

Resources

About