KEYWORDS: Personal digital assistants, Global Positioning System, Sensors, Simulation of CCA and DLA aggregates, Antennas, Receivers, Commercial off the shelf technology, Digital electronics, Communication engineering, Telecommunications
Nova Engineering, Cincinnati OH, a division of L-3 Communications (L-3 Nova), under the sponsorship of Program
Manager Soldier Warrior (PM-SWAR), Fort Belvoir, VA, has developed a Soldier portable, light-weight, hand-held,
geolocation sensor and processing system called the Handheld Emissions Detector (HED).
The HED is a broadband custom receiver and processor that allows the user to easily sense, direction find, and locate a
broad range of emitters in the user's surrounding area.
Now in its second design iteration, the HED incorporates a set of COTS components that are complemented with L-3
Nova custom RF, power, digital, and mechanical components, plus custom embedded and application software. The
HED user interfaces are designed to provide complex information in a readily-understandable form, thereby providing
actionable results for operators.
This paper provides, where possible, the top-level characteristics of the HED as well as the rationale behind its design
philosophy along with its applications in both DOD and Commercial markets.
KEYWORDS: Transceivers, Orthogonal frequency division multiplexing, Amplifiers, Digital signal processing, Simulation of CCA and DLA aggregates, Signal processing, Field programmable gate arrays, Unattended ground sensors, Modulation, RF communications
The Unattended Ground Sensor (UGS) Community includes many programs slated to incorporate the JTRS
Cluster 5 Transceiver into the baseline systems. However, due to a variety of technical challenges, it's
unclear that the Cluster 5 Transceiver will be available in time to support requirements for near-term
fieldings. As a result, program offices are beginning to investigate interim solutions for Software Defined
Radios (SDR) capable of providing Cluster 5-like flexibility and performance. During the last 15 months,
Nova Engineering has been developing the Core Transceiver, a unique multi-band, multi-rate, Software
Defined Radio. The Core Transceiver operates in four bands (225-400 MHz, 560-698 MHz, 1350-1390
MHz, and 1755-1850 MHz) and is frequency-agile across these multiple bands, thereby providing
maximum flexibility in frequency planning. The transceiver supports adaptable data rates from 100 kbps to
more than 1 Mbps, enabling the device to satisfy requirements for sensor-to-sensor communications, as
well as gateway links. This transceiver utilizes an Orthogonal Frequency Division Multiplex (OFDM)
waveform for robust operation in ground-to-ground multipath environments. The Core Transceiver is
compact in size (6.5" x 2.85" x 0.8") and designed for energy-constrained applications. This paper
introduces the Core Transceiver requirements, design concept, and implementation, and outlines a strategy
for applying this transceiver within the UGS Community.
The CAVE is a multi-person, room-sized, high-resolution, 3D video and auditory environment, which can be used to present very immersive virtual environment experiences. This paper describes the CAVE technology and the capability of the CAVE system as originally developed at the Electronics Visualization Laboratory of the University of Illinois- Chicago and as more recently implemented by Wright State University (WSU) in the Armstrong Laboratory at Wright- Patterson Air Force Base (WPAFB). One planned use of the WSU/WPAFB CAVE is research addressing the appropriate design of display and control interfaces for controlling uninhabited aerial vehicles. The WSU/WPAFB CAVE has a number of features that make it well-suited to this work: (1) 360 degrees surround, plus floor, high resolution visual displays, (2) virtual spatialized audio, (3) the ability to integrate real and virtual objects, and (4) rapid and flexible reconfiguration. However, even though the CAVE is likely to have broad utility for military applications, it does have certain limitations that may make it less well- suited to applications that require 'natural' haptic feedback, vestibular stimulation, or an ability to interact with close detailed objects.
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