Sonar inside your body: Prototyping ultrasonic intra-body sensor networks

Santagati, G. Enrico; Melodia, Tommaso

doi:10.1109/infocom.2014.6848216

Cited by 51 publications

(33 citation statements)

References 14 publications

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“…The corresponding time domain impulse response is a sinc function as in (2). Thus, convolving a sampled signal with (2) reconstructs the original continuous signal.…”

Section: A Interpolation Overviewmentioning

confidence: 99%

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A Comparative Study for Performance and Power Consumption of FPGA Digital Interpolation Filters

Donnelly¹,

Choi²,

Kildishev³

et al. 2017

ijacsa

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Abstract-The development of FPGA-based digital signal processing devices has been gaining attention. Researchers seek to reduce power consumption and enhance signal processing quality in these devices with given resources and spatial limits. Hence, there is a need to investigate both the capability and the power consumption associated with the various digital filtering schemes commonly used in FPGA-based devices. We carry out a set of performance and power consumption measurements of interpolation filters using an FPGA and other basic signal processing building blocks. We compare the signal processing performance with theoretical prediction, and measure the power consumed by the filters. Our experimental measurements also confirm the accuracy of the numerical tools used for predicting FPGA power consumption. This paper is aimed at providing a framework to accurately test basic signal processing across various interpolation schemes and compare the respective schemes' software-side contributions to power consumption and filtering quality.

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“…The corresponding time domain impulse response is a sinc function as in (2). Thus, convolving a sampled signal with (2) reconstructs the original continuous signal.…”

Section: A Interpolation Overviewmentioning

confidence: 99%

“…The intra-body sensor in [2] showed clear trade-offs between power consumption and signal processing quality. Likewise, the increasing digital signal processing (DSP) capability of portable heart monitoring devices [23], [24] must be accounted for as part of the available energy budget.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study for Performance and Power Consumption of FPGA Digital Interpolation Filters

Donnelly¹,

Choi²,

Kildishev³

et al. 2017

ijacsa

View full text Add to dashboard Cite

show abstract

“…Software defined techniques have been of interest in recent years not only for terrestrial radios but also acoustics and ultrasonics [4]. Jones et al described some of the benefits to the use of software define radio for underwater use [5].…”

Section: Introductionmentioning

confidence: 99%

Software-defined underwater acoustic networking platform and its applications

et al. 2015

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a b s t r a c tAs underwater communications adopt acoustics as the primary modality, we are confronting several unique challenges such as highly limited bandwidth, severe fading, and long propagation delay. To cope with these, many MAC protocols and PHY layer techniques have been proposed. In this paper, we present a research platform that allows developers to easily implement and compare their protocols in an underwater network and configure them at runtime. We have built our platform using widely supported software that has been successfully used in terrestrial radio and network development. The flexibility of development tools such as software defined radio, TinyOS, and Linux have provided the ability for rapid growth in the community. Our platform adapts some of these tools to work well with the underwater environment while maintaining flexibility, ultimately providing an end-to-end networking approach for underwater acoustic development. To show its applicability, we further implement and evaluate channel allocation and time synchronization protocols on our platform.

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“…However, the fixed hardware of these off-the-shelf acoustic modems supports only limited reconfigurations. Therefore, the need for a modem that supports full reconfigurability to enable cognitive, runtime-adaptive communication systems is evident [12,13]. Moreover, such SDR-based modem would offer the ability to incorporate further algorithmic developments to improve its performance through software updates.…”

Section: Introductionmentioning

confidence: 99%

Design of A Software-defined Underwater Acoustic Modem with Real-time Physical Layer Adaptation Capabilities

Demirors

Sklivanitis

Santagati

et al. 2014

Proceedings of the International Conference on Underwater Networks %Systems - WUWNET '14

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This article describes the design of a custom software-defined modem with adaptive physical layer for underwater acoustic (UWA) communications. The modem consists of a commercial software-defined radio (SDR) interfaced with a wideband acoustic transducer through amplifying circuitry. With this custom-built platform, we focus on the unique physical layer challenges of the underwater acoustic channel to demonstrate the benefits of real-time adaptation in such rapidly varying environments. We first focus on an Orthogonal-Frequency-Division-Multiplexing (OFDM) transmission scheme. In particular, for the forward link, we consider and implement a high-data rate Zero-Padded OFDM (ZP-OFDM) physical layer with a superimposed convolutional error-correction coding scheme. ZP-OFDM offers high reconfigurability in terms of number of OFDM subcarriers, modulation type (e.g., BPSK, QPSK), and error-correction coding rate. Real-time adaptation at the transmitter is achieved through a robust feedback link based on a binary chirp spread-spectrum modulation (B-CSS). We demonstrate that joint real-time adaptation of system parameters such as modulation constellation and channel coding rate leads to significant data rate increase under preset bit-error-rate (BER) constraints. Moreover, in the same context, we present for the first time a seamless switch of our SDR transmitter between different signaling technologies such as OFDM and direct-sequence spread-spectrum (DS-SS).

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Sonar inside your body: Prototyping ultrasonic intra-body sensor networks

Cited by 51 publications

References 14 publications

A Comparative Study for Performance and Power Consumption of FPGA Digital Interpolation Filters

A Comparative Study for Performance and Power Consumption of FPGA Digital Interpolation Filters

Software-defined underwater acoustic networking platform and its applications

Design of A Software-defined Underwater Acoustic Modem with Real-time Physical Layer Adaptation Capabilities

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