• Incompatibility of Trellis-Based Noncoherent SOQPSK Demodulators for Use in FEC Applications

      Perrins, Erik; University of Kansas (International Foundation for Telemetering, 2012-10)
    • Telemetry, Aeronautical and Medical: New Frontiers in Spectrum Sharing

      Keane, William K.; Duane Morris LLP (International Foundation for Telemetering, 2012-10)
    • CCSDS Telemetry over DVB-S2: Characteristics, Receiver Implementation and Performances

      Guérin, A.; Millerious, J.-P.; Deplancq, X.; Lesthievent, G.; Llauro, M.; Pasternak, N.; Baissac, S.; Centre National d’Etudes Spatiales (CNES); Zodiac Data Systems (International Foundation for Telemetering, 2012-10)
      The CNES (French Space Agency) has recently proposed to apply the ETSI DVB-S2 telecom standard onto the CCSDS ones (currently "red book") to cope with the high data rate requirement of Telemetry for Earth Observation Satellites. A very high data rate implementation (up to 400 MBauds) of this recommended standard has been achieved by Zodiac Data Systems onto their Cortex HDR XXL receiver. This paper presents the latest version of that recommended standard as well as results obtained with the Cortex demodulator. A specific focus is done on the extremely low degradation performed at high rate, even with 32APSK modulation.
    • Optimized Constellation Mappings for Adaptive Decode-and-Forward Relay Networks using BICM-ID

      Borah, Deva K.; Kumar, Kuldeep; New Mexico State University (International Foundation for Telemetering, 2012-10)
      In this paper, we investigate an adaptive decode-and-forward (DF) cooperative diversity scheme based on bit interleaved coded modulation with iterative decoding (BICM-ID). Data bits are first encoded by using a convolutional code and the coded bits after an interleaver are modulated before transmission. Iterative decoding is used at the receiver. Optimized constellation mapping is designed jointly for the source and the relay using a genetic algorithm. A novel error performance analysis for the adaptive DF scheme using BICM-ID is proposed. The simulation results agree well with the analytical results at high signal-to-noise ratio (SNR). More than 5.8 dB gain in terms of SNR over the existing mappings is achieved with proposed mappings.
    • A Runlength Coded LDPC Scheme for Insertion/Deletion Correction in Multimedia Watermarking

      Vasic, Bata; Vasic, Bane; University of Nis; University of Arizona (International Foundation for Telemetering, 2012-10)
      We describe a simple and effective coding scheme for insertion/deletion channels. It is based on runlength coding which converts a class of insertion/deletion channels that have infinite memory into memoryless channels, which are much easier to handle. Runlength coding is then combined with powerful error correction low-density parity-check (LDPC) codes designed for memoryless channels. We consider a novel applications of this technique in multimedia watermarking using quantization index modulation operating on the three dimensional mesh vertices. The runlength LDPC coding recovers the data hidden in the vertices removed by the process of mesh simplification.
    • Remote-Sensed LIDAR Using Random Impulsive Scans

      Creusere, Charles D.; Castorena, Juan; New Mexico State University (International Foundation for Telemetering, 2012-10)
      Third generation full-waveform (FW) LIDAR systems image an entire scene by emitting laser pulses in particular directions and measuring the echoes. Each of these echoes provides range measurements about the objects intercepted by the laser pulse along a specified direction. By scanning through a specified region using a series of emitted pulses and observing their echoes, connected 1D profiles of 3D scenes can be readily obtained. This extra information has proven helpful in providing additional insight into the scene structure which can be used to construct effective characterizations and classifications. Unfortunately, massive amounts of data are typically collected which impose storage, processing and transmission limitations. To address these problems, a number of compression approaches have been developed in the literature. These, however, generally require the initial acquisition of large amounts of data only to later discard most of it by exploiting redundancies, thus sampling inefficiently. Based on this, our main goal is to apply efficient and effective LIDAR sampling schemes that achieve acceptable reconstruction quality of the 3D scenes. To achieve this goal, we propose on using compressive sampling by emitting pulses only into random locations within the scene and collecting only the corresponding returned FW signals. Under this framework, the number of emissions would typically be much smaller than what traditional LIDAR systems require. Application of this requires, however, that scenes contain many degrees of freedom. Fortunately, such a requirement is satisfied in most natural and man-made scenes. Here, we propose to use a measure of rank as the measure of degrees of freedom. To recover the connected 1D profiles of the 3D scene, matrix completion is applied to the tensor slices. In this paper, we test our approach by showing that recovery of compressively sampled 1D profiles of actual 3D scenes is possible using only a subset of measurements.
    • EELV Incorporates GPS Metric Tracking as a Range Tracking Source

      Broadus, Charles; Siegal, Richard; Kreng, Jack; Moore, Theodore; United Launch Alliance; Microwave Innovations; The Aerospace Corporation (International Foundation for Telemetering, 2012-10)
      Currently, the Evolved Expendable Launch Vehicle (EELV) utilizes a communications, tracking, and control system that was developed at the inception of the space launch industry. The current system operation and large ground footprint have driven the United States Air Force (USAF) to embark on an initiative known as the Future Flight Safety System (FFSS) that will lead into a Space Based Range Concept. An important phase of FFSS is the implementation of Global Positioning System Metric Tracking (GPS MT) on all launch vehicles. Working in partnership, United Launch Alliance (ULA) and their USAF EELV customer have developed a common GPS MT solution for both the Atlas V and Delta IV Launch Vehicles.
    • Minimizing Interference in Simultaneous Operations between GPS and Other Instrumentation Systems

      Kujiraoka, Scott; Troublefield, Robert; Fielder, Russell; NAVAIR (International Foundation for Telemetering, 2012-10)
      Currently many airborne platforms (missiles, targets, and projectiles) contain multiple instrumentation systems to cover the functions of GPS and either telemetry, beacon tracking and/or flight termination. Most of these platforms are not very large, so mounting of various antennas to support these functions are physically close to each other. As a result, unwanted interference (in the form of RF coupling between them) is unavoidable. This paper will discuss the design considerations involved to minimize this interference as well as some lessons learned with its implementation.
    • System-Level Algorithm Design for Radionavigation using UWB Waveforms

      Iltis, Ronald A.; University of California, Santa Barbara (International Foundation for Telemetering, 2012-10)
      A radiolocation/navigation system is considered in which mobile nodes use ultra-wideband (UWB) radios to obtain inter-node ranges via round-trip travel time (RTT). Each node is also assumed to contain an inertial measurement unit (IMU) which generates 2D position estimates subject to Gaussian drift and additive noise errors. The key problem in such a system is obtaining 2 or 3-D position estimates from the nonlinear UWB range measurements and fusing the resulting UWB and IMU estimates. The system presented uses a Steepest Descent Random Start (SDRS) algorithm to solve the nonlinear positioning problem. It is shown that SDRS is a stable algorithim under a realistic communications reciprocity assumption. The SDRS estimates are then treated as measurements by the navigation Kalman filter. The navigation filter also processes separate IMU-derived position estimates to update node position/velocity. Simulation results for an urban corridor are given showing < 6 m. rms position errors.
    • An Innovative Approach to Modernizing Telemetry

      Radke, Mark; Young, Tom; Edwards Air Force Base (International Foundation for Telemetering, 2012-10)
      Growing pressures on today's testing resources are driving the need for a change in the way telemetry is currently being done. As systems advance and become more complex, testing these systems becomes more difficult due to budget, schedule and test resource constraints. These pressures create the need to support more concurrent testing with ever increasing numbers of participants and bandwidth requirements, all while available resources are diminishing. In order to continue to provide support to the war fighter through timely and efficient testing of new systems, the test infrastructure needs to be updated to become more agile and efficient. We will examine the application of innovative new technologies and concepts to increase the capabilities of the testing infrastructure in the presence of shrinking resources. By leveraging advances in wireless technologies, telemetry networks and other technologies, we will present alternatives to the current telemetry paradigm.
    • A 10W Low Cost OFDM Transceiver (LCOT)

      Sandhiya, Pallavi; Zaki, Nazrul; Satterfield, Rickey; Bundick, Steve; Thompson, Keith; Grant, Charles; NASA/GSFC Wallops Flight Facility (International Foundation for Telemetering, 2012-10)
      This paper details design, development and test of the Low Cost OFDM Transceiver (LCOT) LCT2-040-2200 module at S band. The goal of the project is to provide a low cost transmit and receive unit for demonstrating OFDM communication on a flight platform. The LCOT module is built to transmit and receive OFDM signals. It transmits OFDM signals at 10W power out through a custom built high power amplifier and conforms to the IEEE 802.11.g spectral emissions mask.
    • Design of a Radio channel Simulator for Aeronautical Communications

      Montaquila, Roberto V.; Iudice, Ivan; Castrillo, Vittorio U.; C.I.R.A. (International Foundation for Telemetering, 2012-10)
      The goal of this paper is to implement a model of multipath fading in a radio channel simulator for aeronautical applications. When developing a wireless communications system, it is useful to perform simulations of the radio context in which the system has to operate. A radio link is substantially composed by three parts: transmitting segment, transmission channel and receiving segment. We focus our attention on the radio channel propagation. We proposed two geometrical models of a territory corresponding to a determined flight area and, after importing the data needed to estimate our parameters, we compared our results with the channel soundings in literature, obtaining comparable values.
    • Telemetry System for Remote Monitoring of Utility Usage in Commercial and Residential Structures

      Grott, Steven; Lecko, David; Parker, Ryan; Price, Nathan; Missouri University of Science and Technology (International Foundation for Telemetering, 2012-10)
      The system described in this paper can monitor utility usage in commercial and residential structures, and send an alert message over conventional cell phone networks when it detects an anomalous condition. Such a condition could indicate a utility outage, structure failure, HVAC system failure, water leak, etc. The microcontroller-based system can measure electrical current, carbon monoxide, methane, liquid propane, temperature, barometric pressure, and altitude using a wired and wireless sensor network. The microcontroller displays the measurements on local and external graphical user interface, and sends SMS alert messages when necessary. The system may be retrofitted into existing structures.
    • Novel Broadband Direction of Arrival Estimation Using Luneburg Lens

      Yu, Xiaoju; Liang, Min; Sabory-Garcia, Rafael; University of Arizona (International Foundation for Telemetering, 2012-10)
      A broadband passive direction finding system utilizing Luneburg lens has been investigated. With the simulated power level distribution at the detectors mounted on a Luneburg lens, both Cramér-Rao bound (CRB) and the root mean square error (RMS) based on the Correlation Algorithm (CA) for the direction of arrival (DoA) estimation have been derived and calculated. Guidelines on how to design the Luneburg lens detecting system have been studied. Finally, as a proof-of-concept demonstration, the DoA performance of a Luneburg lens fabricated using the polymer jetting technology with five detectors 10° equally spaced to receive the azimuth signal from -20° to 20° is demonstrated.
    • Implementation of the AeroTP Transport Protocol in Python

      Gogi, Santosh Ajith; Zhang, Dongsheng; Çetinkaya, Egemen K.; Rohrer, Justin P.; University of Kansas (International Foundation for Telemetering, 2012-10)
      The aeronautical transport protocol AeroTP addresses the challenges of end-to-end communication in the highly dynamic airborne telemetry network environment. The protocol has multiple modes: reliable, near-reliable, quasi-reliable, unreliable connection, and unreliable datagram. We present our Python implementation of AeroTP. The results of preliminary experiments conducted on Linux systems using AeroTP quasi-reliable mode are comparable to previous simulation results.
    • Small Wearable Antenna for Animal Tracking

      Melde, Kathleen; Marcellin, Michael; Fowler, Jared R.; Austin, Jon M.; Estrada, Kathy T.; Velazquez, Martin; Mohr, Robyn; Sanchez, Ruben; University of Arizona (International Foundation for Telemetering, 2012-10)
      Many tracking devices exist in today's world. There are car tracking devices, hunting dog tracking devices, and even cell phone tracking devices. The use of Global Positioning Systems (GPS) has increased the ability to track various subjects throughout all parts of the world. However, there is no reliable tracking device for small mammals that allows researchers to maintain an unobtrusive distance from the animals. The goal of this project was to begin the process for designing a tracking system for small mammals. The overall system design utilizes a Garmin Astro 320 GPS tracking unit in order to focus on effectively reducing the size of the external antenna. Through the use of current technology and the knowledge of several engineering disciplines, an antenna was designed and embedded into a collar which connects with the Astro unit. This new antenna is compact and more suitable for tracking the Golden Lion Tamarin, a small monkey living in the Brazilian rain forest.
    • Servo Controls for Low S/N Satellite Auto-Tracking

      Busch, Chuck E.; ViaSat Inc. (International Foundation for Telemetering, 2012-10)
      At very low Signal to Noise receive ratios, a typical Autotrack servo loop exhibits significant servo noise tracking jitter that can degrade the received signal characteristics. The angular jitter can be minimized by a lowering of the autotracking servo loop bandwidth, but at the sacrifice of the servos ability to reject external torque disturbances, such as wind deflections. As satellite downlinks continue to move to higher frequencies, the angular errors caused by either the tracking noise or the wind deflections of a receive antenna will have increasingly negative effect on the quality of the received data. This paper examines the performance of a servo algorithm that maintains the needed wide bandwidth characteristics of wind deflection rejection while achieving the noise smoothing characteristics of a very low bandwidth Autotrack servo response. The control algorithms have been tested on a 13 meter Remote Sensing Satellite tracking system to determine the overall tracking performance of the new implementation. Current results indicate that the new servo configuration achieves the desired results typical of a wide bandwidth system of high wind rejection and low target dynamics tracking errors. At the same time, it provides elimination of slowly changing errors from axis miss-alignments, thermal effects, and gravitational effects and the low RF noise jitter performance typical of a low bandwidth system.
    • Application of High Performance Avionics Test and Analysis Software Tools to Chapter 10 Data

      Cavera, Jim; AIM-USA (International Foundation for Telemetering, 2012-10)
      For many years, telemetry data has been captured and exchanged in IRIG 106 Chapter 10 format. Traditionally, the emphasis has been on the analysis and display of chapter 10 formatted PCM data. In recent years, avionics bus and network data has become much more widely used. Due to the lack of specialized tools to allow engineers to quickly and efficiently view bus parameters, the manipulation and analysis of this data after it is acquired has been a time consuming process. This paper will present a solution to this problem by the use of commercially available software tools used in conjunction with a common parameter database and a Chapter 10 "translator".
    • Towards Interoperable Seamless Telemetry Display Environments

      Guadiana, Juan M.; Manshad, Muhanad S.; Morris, Scott A.; McKinley, Robert A.; WSMR ARAV; WSMR TENA; PMRF TENA (International Foundation for Telemetering, 2012-10)
      This paper discusses the current development of all-in-one telemetry displays. This system provides a self-configuring environment utilizing common telemetry display objects that setup and deploy. Often range display systems require frequent revision to reason with changing requirements. The display is rendered accordingly as a strip-chart equivalent or other element, per requirements from a flight safety officer for example. Our reusable code system approach is based on a novel abstraction of the display elements. The approach may be deployed beyond the decommutation stage as is typically done or interface directly to a plug in software decommutator. This system's plug-and-play functionality facilitates rapid deployment of interoperable Department of Defense (DOD) range displays and recorders.
    • Spectrum Management in Telemetry Networks

      Fofanah, Jemilatu; Morgan State University (International Foundation for Telemetering, 2012-10)
      Spectrum efficiency is the key challenge in modern telemetry systems. Network telemetry requires moving from a dedicated link structure to a network structure which is a very complex problem and requires spectrum management tools. A mixed network structure has been previously proposed for networked telemetry which employs a combination of cellular and Adhoc networks. Significant improvements in QoS and clustering of the complex aeronautical networks have been observed and published in several venues. However in the earlier work routing within the Ad-hoc clusters has not been addressed and the clustering has been done using an enhanced K-means clustering. In this paper, a well known clustering algorithm is adopted in the mixed network concept and clustering of the Ad-hoc nodes are optimized based on shortest route to the gateway and minimum hop count criteria. The proposed clustering technique in this paper leads to a jointly optimized cluster-topology and gateway-selection solution a complex aeronautical network. Simulation results towards the end of this paper illustrate that with the proposed method, cluster configuration is locally optimized and the best gateway for each cluster is successfully selected. With addition of traffic measures to the consideration in the routing, the proposed solution will leads to efficient spectrum allocation and improved QoS.