ABOUT THE COLLECTION

The International Telemetering Conference/USA (ITC/USA) is dedicated to the promotion and stimulation of technical growth in telemetering and its allied arts and sciences. It is the premier annual forum and technical exhibition providing telemetry specific short courses, technical papers from professionals and students, and exhibits of the industry’s leading companies. ITC/USA is sponsored by the International Foundation for Telemetering (IFT), a non-profit corporation dedicated to serving the technical and professional interests of the telemetering community.

This collection contains the proceedings of the forty-seventh International Telemetering Conference, October 24-27, 2011. The conference, sponsored by the International Foundation for Telemetering, was held at the Bally's Las Vegas in Las Vegas, Nevada.

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Recent Submissions

  • The Performance of Simple Receivers for MIMO SOQPSK-TG Systems

    Sahin, Cenk; University of Kansas (International Foundation for Telemetering, 2011-10)
    We investigate the performance of reduced complexity receivers for aeronautical telemetry shaped-offset quadrature phase shift-keying (SOQPSK-TG) in multiple-input multiple-output (MIMO) channels. We use spatial multiplexing (SM) to achieve the highest throughput possible. Two types of channel equalization methods are considered to separate the substreams sent by independent antennas. The first method employs linear equalizers, including minimum mean-squared error (MMSE) and zero-forcing (ZF), to nullify the intersymbol interference (ISI) introduced by the MIMO channel in a single step. The second method, vertical Bell Labs layered space time (V-BLAST) architecture, removes the ISI iteratively by the use of decision feedback (DE). The channel equalizer is followed by a suboptimal SOQPSK-TG detector. The performance of various equalizer/detector pairs are presented. The results show that computationally efficient MIMO SOQPSK-TG architectures achieve excellent bit error rate (BER) performance while transmitting at high data rates.
  • Prototype MIMO Transmitter for Spin Stabilized Vehicles

    Kosbar, Kurt; Eckler, Kyle; Missouri University of Science and Technology (International Foundation for Telemetering, 2011-10)
    This paper describes the design of an inexpensive and scalable transmitter for a Multiple-Input Multiple-Output (MIMO) communication system. The transmitter is intended to be used in aerospace applications, especially in spin stabilized vehicles. A field programmable gate array (FPGA) in the modulator will implement a modified Alamouti space time block code which will take advantage of the cyclostationary nature of the channel to increase the system data rate.
  • Capacity Enhancement in Aeronautical Channels by MIMO Technology

    Cole-Rhodes, Arlene; Moazzami, Farzad; Morgan State University (International Foundation for Telemetering, 2011-10)
    This paper shows how the application of MIMO (multiple-input multiple-output) communication methods can enhance telemetry systems. The main contribution of MIMO to the communication systems is improving spectral efficiency by exploiting spatial diversity of multiple antennas. For communications using high order QAM modulated signals, a blind MIMO equalizer is proposed in earlier works. In this work the possibility of adapting blind MIMO equalizer to iNET problems is explored. In addition, MIMO equalization is adapted to operate as a successive interference cancellation (SIC) scheme to improve the quality of received signal in a high interference environment by capturing and cancelling the interferer.
  • A New Approach to Multipath Mitigation in Aeronautical Telemetry

    Rice, Michael; Narumanchi, Gayatri; Saquib, Mohammad; Brigham Young University; University of Texas at Dallas (International Foundation for Telemetering, 2011-10)
    This paper compares the bit error rate performance of a single channel equalizer with the bit error rate performance of a multi-channel equalizer (in the form of the time-reversed space-time block code) using channels derived from multipath channel measurements at Edwards AFB, California, and Cairns Army Airfield, Ft. Rucker, Alabama. The results show that the performance of the multi-channel equalizer is better than the single channel equalizer over the weaker channel, but worse than the performance of the single channel equalizer over the stronger channel. We conclude that the best approach for the informed transmitter is to apply all available power to a single antenna, whereas the best approach for the uninformed transmitter is to apply equal power with transmit diversity to the two available antennas.
  • Analysis of a Combined GLONASS/Compass-I Navigation Algorithm

    Peng, Song; Xiao-yu, Chen; Jian-zhong, Qi; North China University of Technology (International Foundation for Telemetering, 2011-10)
    Compass-I system is China has built satellite navigation system. It's a kind of regional position system according to the double-star position principle. Commonly, Compass-I system need adopt active position, in the paper several passive position methods are put forward. A combination navigation mode based on GLONASS and Compass-I passive navigation is proposed in this paper. The differences of coordinates and time systems between those two navigation systems are analyzed. User position is calculated by least squares method. Combination Navigation Algorithm can improve visible satellite constellation structure and positioning precision so as to ensure the reliability and continuity of positioning result.
  • Detect Sense and Avoid Radar for UAV Avionics Telemetry

    Allen, Chris; Leuschen, Carl; Seybert, Audrey; Fuller, Jay; Townley, Bryan; University of Kansas (International Foundation for Telemetering, 2011-10)
    This paper describes the development and test results of a Frequency Modulated Continuous Wave (FMCW) L-Band radar testbed designed to detect obstacles in the proximity of an Unmanned Aerial Vehicle (UAV). From laboratory loopback tests, it was calculated that with pulse compression and a transmit power of 150 mW (22 dBm), the radar is capable of detecting an object with a 0.014-m2 radar cross-sectional area at ranges between 500 ft to 1 mi. Analysis shows that post processing of the collected data would reveal information about the obstacle such as its range and location relative to the aircraft. Design and testing procedures are discussed.
  • Advances in Telemetry Capability as Demonstrated on an Affordable Precision Mortar

    Don, Michael L.; Aberdeen Proving Ground (International Foundation for Telemetering, 2011-10)
    This paper presents three telemetry techniques demonstrated on an affordable precision mortar that allowed the guidance, navigation, and control (GNC) system to be effectively analyzed. The first is a technique for the real-time integration and extraction of GPS data into a sensor telemetry stream. The second is a method for increasing telemetry bandwidth by saving a short period of high rate data and then broadcasting it over the rest of the flight test. Lastly, I present an on-board data storage implementation using a MicroSD card.
  • Secure Telemetry: Attacks and Counter Measures on iNET

    Dean, Richard; Odesanmi, Abiola; Moten, Daryl; Morgan State University (International Foundation for Telemetering, 2011-10)
    iNet is a project aimed at improving and modernizing telemetry systems by moving from a link to a networking solution. Changes introduce new risks and vulnerabilities. The nature of the security of the telemetry system changes when the elements are in an Ethernet and TCP/IP network configuration. The network will require protection from intrusion and malware that can be initiated internal to, or external of the network boundary. In this paper we will discuss how to detect and counter FTP password attacks using the Hidden Markov Model for intrusion detection. We intend to discover and expose the more subtle iNet network vulnerabilities and make recommendations for a more secure telemetry environment.
  • Secure IP Multicasting with Encryption Key Management

    Dean, Richard; Maharjan, Nadim; Moten, Daryl; Morgan State University (International Foundation for Telemetering, 2011-10)
    This paper presents the design for secure IP multicasting in an iNet environment using public key cryptography. Morgan State University has been conducting research to improve the telemetry network by improving network performance, implementing IP (Internet Protocol) multicasting and providing a stronger security system for the iNet environment. The present study describes how IP multicasting could be implemented to provide more secure communication in the iNet environment by reducing traffic and optimizing network performance. The multicast of data is closely tied to the key management center for secure applications. This paper develops a means of delivering keys between two or more parties showing a relationship between the multicast network and the Key Management Center (KMC). The KMC is an element of the system which distributes and manages session keys among multicast members. A public key encryption method is used to address the distribution of session keys in the multicast network. The paper will present a system level design of multicast and key management with dual encryption of session keys for the iNet system.
  • Telemetry Post-Processing in the Clouds: A Data Security Challenge

    Kalibjian, J. R.; Hewlett Packard Corporation (International Foundation for Telemetering, 2011-10)
    As organizations move toward cloud [1] computing environments, data security challenges will begin to take precedence over network security issues. This will potentially impact telemetry post processing in a myriad of ways. After reviewing how data security tools like Enterprise Rights Management (ERM), Enterprise Key Management (EKM), Data Loss Prevention (DLP), Database Activity Monitoring (DAM), and tokenization are impacting cloud security, their effect on telemetry post-processing will also be examined. An architecture will be described detailing how these data security tools can be utilized to make telemetry post-processing environments in the cloud more robust.
  • Results from the Prognostic Analysis Completed on the NASA EUVE Satellite to Measure Equipment Mission Life

    Losik, Len; Failure Analysis (International Foundation for Telemetering, 2011-10)
    This paper addresses the research conducted at U.C. Berkeley Space Sciences Laboratory, Center for Extreme Ultra Violet Astrophysics between 1994 and 1995 on the NASA EUVE ion-orbit satellite. It includes the results from conducting a scientific analysis called a prognostic analysis completed on all satellite subsystem equipment. A prognostic analysis uses equipment analog telemetry to measure equipment remaining usable life. The analysis relates equipment transient behavior, often referred to as "cannot duplicates" in a variety of industries caused from accelerated aging to the equipment end-of-life with certainty. The analysis was confirmed by using proprietary, pattern recognition software by Lockheed Martin personnel Lockheed Martin personnel completed an exploration into the application of statistical pattern recognition methods to identify the behavior caused from accelerated aging that experts in probability reliability analysis claims cannot exist. Both visual and statistical methods were successful in detecting suspect accelerated aging and this behavior was related to equipment end of life with certainty. The long-term objective of this research was to confirm that satellite subsystem equipment failures could be predicted so that satellite subsystem and payload engineering personnel could be allocated for only the time that equipment failures were predicted to occur, lowering the cost of mission operations. This research concluded that satellite subsystem equipment remaining usable life could be measured and equipment failures could be predicted with certainty so that engineering support for mission operations could be greatly reduced.
  • Using COTS Graphics Processing Units in Signal Analysis Workstations

    Kosbar, Kurt; Crook, Alex; Kissinger, Gregory; Missouri University of Science and Technology (International Foundation for Telemetering, 2011-10)
    Commercial off-the-shelf (COTS) graphics processing units (GPU) perform the signal processing operations needed for video games and similar consumer applications. The high volume and competitive nature of that industry have produced inexpensive GPUs with impressive amounts of signal processing power. These devices use parallel processing architectures to execute DSP algorithms far faster than single, or even multi-core central processing units typically found in workstations. This paper describes a project which improves the performance of a radar telemetry application using the NVidia™ brand GPU and CUDA™ software, although the results could be extended to other devices.
  • Flight Test Evaluation of a Hi-Speed Near Real-Time 720I Image Processing Application

    Guarino de Vasconcelos, Luiz Eduardo; Leite, Nelson Paiva Oliveira; Pinheiro, Carlos Alberto Murari; Carpinteiro, Otávio Augusto Salgado; Instituto de Pesquisas e Ensaios em Voo; Universidade Federal de Itajubá (International Foundation for Telemetering, 2011-10)
    Nowadays, with the development of the electronics, a video camera can produce hi-resolution and hi-speed images with a very good sensitivity. A typical application is the execution of the Air Data System (ADS) Calibration Flight Test Campaign (FTC) using the Tower-Fly-By method, where the aircraft reference altitude is computed from video frames. To improve efficiency, safety and effectiveness for this FTC, the Flight Test Research Institute (IPEV) developed a near real-time video processing application to compute the aircraft altitude from 720i video frames at up to 400 fps. This development was executed as Master Science dissertation along with Itajubá State University (UNIFEI). Tests results demonstrated satisfactory performance for this tool compared to Ground Telemetry System (GTS) and Global Positioning System (GPS).
  • Adapting Fourier Analysis for Predicting Earth, Mars and Lunar Orbiting Satellite's Telemetry Behavior

    Losik, Len; Failure Analysis (International Foundation for Telemetering, 2011-10)
    Prognostic technology uses a series of algorithms, combined forms a prognostic-based inference engine (PBIE) for the identification of deterministic behavior embedded in completely normal appearing telemetry from fully functional equipment. The algorithms used to define normal behavior in the PBIE from which deterministic behavior is identified can be adapted to quantify normal spacecraft telemetry behavior while in orbit about a moon or planet or during interplanetary travel. Time-series analog engineering data (telemetry) from orbiting satellites and interplanetary spacecraft are defined by harmonic and non-harmonic influences, which shape it behavior. Spectrum analysis can be used to understand and quantify the fundamental behavior of spacecraft analog telemetry and relate the behavior's frequency and phase to its time-series behavior through Fourier analysis.
  • Research About the Efficient Recording Structure of Installed Data Recording Devices

    Lee, Hyun-Kyu; Lee, Hyun-So; Song, Jae-Hoon; Danamsystems Inc.; Korea Aerospace Research Institute (KARI) (International Foundation for Telemetering, 2011-10)
    Although the wireless data transmission technologies have evolved significantly, data recording devices are still being used because of the limitations of data rates and reliability issues over wireless environment in the avionics, military, space etc. Payload has limitation of weight. In addition, storage has limitation of capacity. So, we need to research about a data recording structure within a limited amount of memory. In this paper, we propose a new data recording structure through a condition necessary for efficient use of memory. The proposed structure has an equivalent function as other recording systems. But, it uses less memory than the other equivalent recording structures.
  • The Western Aeronautical Test Range Chapter 10 Tools

    Knudtson, Kevin; Park, Alice; Downing, Bob; Sheldon, Jack; Harvey, Robert; Norcross, April; NASA Dryden Flight Research Center; Arcata Associates, Incorporated (International Foundation for Telemetering, 2011-10)
    The Western Aeronautical Test Range (WATR) staff at the NASA Dryden Flight Research Center is developing a translation software called Chapter 10 Tools in response to challenges posed by post-flight processing data files originating from various on-board digital recorders that follow the Range Commanders Council Inter-Range Instrumentation Group (IRIG) 106 Chapter 10 Digital Recording Standard but use differing interpretations of the Standard. The software will read the date files regardless of the vendor implementation of the source recorder, displaying data, identifying and correcting errors, and producing a data file that can be successfully processed post-flight.
  • The Implications for Network Recorder Design in a Networked Flight Test Instrumentation Data Acquisition System

    Cranley, Nikki; ACRA Control (International Foundation for Telemetering, 2011-10)
    The higher bandwidth capacities available with the adoption of Ethernet technology for networked FTI data acquisition systems enable more data to be acquired. However, this puts increased demands on the network recorder to be able to support such data rates. During any given flight, the network recorder may log hundreds of GigaBytes of data, which must be processed and analyzed in real-time or in post-flight. This paper describes several approaches that may be adopted to facilitate data-on-demand data mining and data reduction operations. In particular, the use of filtering and indexing techniques that may be adopted to address this challenge are described.
  • PC-Based Frame Optimizer Using Multiple PCM Files

    Koh, Kwang-Ryul; Lee, Sang-Bum; Yi, Taek-Joon; Kim, Whan-Woo; Agency for Defense Development; Danam Systems; Chungnam National University (International Foundation for Telemetering, 2011-10)
    Many engineers have tried to detect and correct erroneous data in telemetry communications. The best source selector can be used to combine data from two or more bit synchronizers to reduce frame error rates. An error-correcting code can be used as well. These techniques are absolutely helpful to obtain reliable telemetry data. However, some errors still remain and must be removed. This paper introduces the way to effectively merge multiple PCM files that are saved in different receiving sites, and shows nearly errorless data resulting from merging flight test data using a PC-based frame optimizer, which is a developed program.
  • Using Data-Driven Prognostic Algorithms for Completing Independent Failure Analysis

    Losik, Len; Failure Analysis (International Foundation for Telemetering, 2011-10)
    Current failure analysis practices use diagnostic technology developed over the past 100 years of designing and manufacturing electrical and mechanical equipment to identify root cause of equipment failure requiring expertise with the equipment under analysis. If the equipment that failed had telemetry embedded, prognostic algorithms can be used to identify the deterministic behavior in completely normal appearing data from fully functional equipment used for identifying which equipment will fail within 1 year of use, can also identify when the presence of deterministic behavior was initiated for any equipment failure.
  • Path Panels vs. Digital Switching Matrices

    Gilorma, Mike; Apogee Labs, Inc. (International Foundation for Telemetering, 2011-10)
    Patch panels are still frequently used in telemetry installations as a means for routing signals during and in between missions. These patch panels have been used for decades and have many benefits operationally speaking. Digital switching matrices on the other hand, while very popular in the broadcasting and music industries, are not being fully utilized in the telemetry world. Digital switches offer many of the same benefits of patch panels along with an abundance of added features including signal conversion and distribution. This paper describes the benefits of migrating from patch panels to digital switching matrices. It will discuss both the pros and cons of each technology as well as look at the short term and long term cost implications of each. This paper will also discuss return on investment and operational improvements that can be gained from utilizing digital switching matrices in place of patch panels.

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