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Zhou Y.,Texas A&M University | Chiu C.-W.,Texas A&M University | Sanchez C.J.,Texas A&M University | Gonzalez J.M.,Texas A&M University | And 5 more authors.
Journal of Bionic Engineering | Year: 2013

Many insect families have evolved to produce and detect complex singing patterns for the purposes of mating, display of dominance, predator escape, and other needs. While the mechanisms of sound production by insects have been thoroughly studied, man-machine exploitation of such mechanisms has remained unreported. We therefore describe a method to modulate the frequency spectrum in the chirp call of a singing insect, Gampsocleis gratiosa (Orthoptera: Tettigoniidae), a large katydid indigenous to China and commonly known as Guo Guo or Chinese Bush Cricket. The chirp modulation was achieved through the contact of a ribbon of Ionic Polymer-Metal Composite (IPMC) against wing of the insect. The IPMC effectively served as an actuator when a small DC voltage was applied to the ribbon's faces. By applying a sequential on/off voltage waveform to the IPMC ribbon, the katydid's chirp was modulated in a corresponding manner. This configuration can be used as part of a broader application of using singing insects to harness their acoustic power to produce and propagate machine-induced messages into the acoustic environment. © 2013 Jilin University.


Sayilir S.,Purdue University | Loke W.-F.,Purdue University | Lee J.,Purdue University | Diamond H.,Purdue University | And 3 more authors.
IEEE Journal of Solid-State Circuits | Year: 2014

This paper presents a wireless transceiver intended for insect-based wireless sensor networks (WSNs). The transceiver utilizes several design techniques developed to meet the challenging low power and low size requirements in insect-based WSNs. The techniques include current reuse in the voltage-controlled oscillator (VCO) and power amplifier (PA), fast PLL on/off switching for low-power on/off keying (OOK) modulation, and switching between transmit and receive (TX/RX) modes without an off-chip switch. Also, the VCO, PA, low noise amplifier (LNA), OOK modulator, and TX/RX switch are co-designed and integrated into a single block to reduce the system complexity significantly. The transceiver is designed and fabricated in a 0.13-μm CMOS process. The transmitter provides an output power in the range of -30 dBm to -4.4 dBm while consuming an average power of 1.2 mW to 4.5 mW. The phase locked-loop (PLL) does not use a high-Q external resonator, and its phase noise depends on the PA output power because of the current reuse in the VCO and PA. The PLL phase noise at 1 MHz offset at 2.4 GHz varies from -103.3 dBc/Hz to -116.7 dBc/Hz. The receiver achieves a sensitivity of -90 dBm at 1 Mbps data rate for a BER = 0.1%. An example wireless sensor node design utilizing the proposed wireless transceiver achieves a modest weight of 1 gram, and a small form factor of 12.5 mm × 12.5 mm. © 1966-2012 IEEE.


Epstein B.R.,OpCoast LLC | Rhodes D.L.,OpCoast LLC
2010 IEEE International Conference on Wireless Information Technology and Systems, ICWITS 2010 | Year: 2010

Due to ongoing improvements in the performance and programmability of commercially available Graphics Processor Units (GPUs), substantial increases in the execution speed of EM propagation analysis through ray tracing is now attainable. This paper presents recent results where RF ray tracing has been applied to analyze signal propagation over complex urban 3D scene models. The ray trace algorithms were programmed to operate as parallel processes over hundreds of core processors that make up the architecture of off-the-shelf GPU chips. © 2010 IEEE.


Sayilir S.,Purdue University | Loke W.-F.,Purdue University | Lee J.,Purdue University | Epstein B.,OpCoast LLC | And 2 more authors.
IEEE Symposium on VLSI Circuits, Digest of Technical Papers | Year: 2013

This paper presents a wireless transceiver for WSNs using insects. It employs current reuse, switch-less switching, and fast PLL on/off switching techniques to reduce the power, size, cost, and weight of the sensor node. Implemented in 130-nm CMOS technology, the transceiver merges VCO, PA, LNA, TX/RX switch, and modulator into a common branch to reduce its power and complexity. In TX mode, the transmit-power can be tuned from -30dBm to -4.4dBm. The sensitivity measured for 0.1% BER in RX mode is -90dBm. © 2013 JSAP.


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OpCoast LLC | Entity website

The Basics OpCoast is a privately-held high-technology company located in Brick, NJ. Our client list includes large and small companies as well as several governmental and US Department of Defense agencies ...


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News and Press Items May 13, 2016 OpCoast publisheds F# tutorial April 30, 2016 OpCoast provides Agile harmonic balance software November 24, 2015 OpCoast develops Target Quote August 31, 2015 OpCoast completes cellular network modeling July 24, 2014 OpCoast offices relocate to a new address


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OpCoast Contact Information The best way to contact us is via email, please use: info atsign opcoast dot com


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Services Overview OpCoast provides commercial and governmental agencies custom services in many areas within the broad realm of software and distributed systems. This includes research and development in networking, web and net services, database, distributed information systems, modeling as well as others ...


Grant
Agency: Department of Defense | Branch: Office for Chemical and Biological Defense | Program: SBIR | Phase: Phase II | Award Amount: 744.67K | Year: 2010

This effort continues the development of "OrthopterNets" -- a novel approach applying mobile ad hoc network (MANET) communications networks for the transfer of intelligent information via insect calls (e.g., cricket calls). Insects will be equipped with embedded MEMS transceivers that pick up modulated calling sounds from nearby insects. Once the information in a call is extracted by the transceiver, the information code is applied to an electromechanical device on board the insect that modulates the insect calls, thereby retransmitting the information to another insect, and so on. The modulation mechanism, among other methods, affects the sound producing movements (stridulation) of an insect''''s wings. Human or machine-based detectors would demodulate and extract the transmitted information. Work leverages existing MEMS technologies already deployed in insect species by the team and elsewhere. Phase II will draw on our Phase I findings to implement OrthopterNet prototypes by applying MEMS devices, a special-purpose ad hoc networking protocol, and off-the shelf electronic components. An RF micro-transceiver will also be embedded in calling and non-calling insects to support the ingress and egress of information to / from the OrthopterNet network, while also backing up the MEMs-based network.

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