Technology

Time Domain’s PulsON® OEM modules offer users the ability to integrate high performance ranging / tracking, radar, and sensor communications into new or existing products. The key is our Ultra Wideband (UWB) technology. Our UWB uses the coherent transmission of sequences of short duration, low duty cycle, low energy RF pulses to provide superior ranging and sensing capabilities at the small size and low cost that you need to be successful.

How does Time Domain’s UWB work?

Our UWB technology is characterized by the following:

  • Short duration pulses. Time Domain’s UWB is based on the coherent transmission and reception of very short duration (thus wide bandwidth) RF waveforms.
  • Waveform is optimized for precision measurements. Because the transmitted waveform is short, with a physical length of approximately 6 inches, it is ideal for determining precise ranges and radar resolution in buildings or outdoors.
  • Pulses are coded and modulated. All transmissions are pseudo-randomly coded and modulated by individually varying the phase of transmitted pulses and the pulse repetition rate.
  • Coherent processing. Any type of transmitted information (ranging, data, or radar) is spread over many transmitted pulses in a packet format.
  • Custom silicon. All of the key UWB RF functions have been reduced to a single custom chip.

uwb-waveform

How does Time Domain’s UWB benefit you?

  • Precision range measurements indoors and outdoors. Because Time Domain is using the ideal RF waveform for in-building operation, an unprecedented level of performance is achieved, both indoors and out.
  • Exceptional radar clutter rejection. Because each transmitted waveform is very short in duration and the system timing is so accurate, the radar provides excellent clutter rejection with virtually no blind region. Time Domain offers the most RF bandwidth (2 GHz) at the lowest possible center frequency (4.3 GHz).
  • Flexible update rates for varying distances. Sending and receiving packets of coherent pulses allows signals to be coherently integrated. As a consequence, the user can dynamically trade update rate for increased operating range.
  • Waveform scans available to the developer. Time Domain’s sensors provide not only range measurements and radar detections but also supply the associated raw data (waveform scans). Providing this scan data allows the system integrator to develop and refine signal processing that is optimized for a given application. For example, this enables the low level fusion of ranging with radar or advanced algorithms in support of mono-, bi-, and multistatic radars.
  • Noise-like transmissions. Because the signals are pseudo-randomly encoded and the signal energy is spread over a wide swath of frequencies, all transmissions are noise-like, making them very unlikely to cause interference as well as very difficult to detect or intercept.
  • Fused operation. Time Domain’s architecture allows a single packet to be used for ranging, communications or radar applications. This capability means that a single board can be used for all three applications. Additionally, any packet can be simultaneously used for all of the three functions.
  • Custom silicon enables low cost modules. Having custom UWB silicon means that Time Domain can provide the customer with a physically small, highly integratabtle, low cost, low power OEM module.

Time Domain’s UWB ranging radio and radar sensor technology has been the subject of many technical publications and reports. A number of these are provided below for you to download.

(If you have authored a paper based on Time Domain’s UWB technology, please let us know about it. We would love to feature your work on our site.)

Ranging / Localization

AUVSI 2016: Indoor Aerial Vehicle Navigation Using UWB Active Two-Way Ranging

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Georgia Tech / GTRI: Real-time, Anchor-free Node Tracking Using UWB Ranging and Odometry Data

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NTU/NUS: UWB-Based Localization for Quadcopter Navigation

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AUVSI 2015: Fused UWB Radio, Communications, and Radar with MEMS Aiding for Indoor Navigation and Collision Avoidance

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WPNC 2015: Precision Navigation with Ad Hoc Auto-Survey Using a UWB Two-Way Ranging Network

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ION GNSS+ 2014: Tightly-Coupled GPS/UWB Ranging for Relative Navigation during Formation Flight

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AUVSI 2014: Ad Hoc Auto-Survey with Precision Local Navigation of Mobile Platforms Using a Peer-to-Peer Ranging Network

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University of Emden / Leer: A Mobile Open Infrastructure Network Protocol (MOIN) for Localization and Data Communication in UWB-Based Wireless Sensor Networks

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EU Microwave Week 2013: SwarmNet: A Distributed Navigation Network Using UWB Ranging and Communications

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CRC Mining / Univ. of Queensland: Characterization of a UWB Transceiver for Mining Applications

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ION GNSS+ 2013: Pulsed-RF UWB Transceivers for Aiding in Distributed Navigation Networks

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Auburn University - ION GNSS+ 2013: UWB-Aided Carrier Phase Ambiguity Resolution in Real-time Kinematic GPS Relative Positioning

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Radar / Sensing

University of Texas at Austin: Synthetic Aperture Radar Using a Small Consumer Drone

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Georgia Tech Research Institute - UWB Tomographic Imaging in Uncalibrated Networks

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IEEE HST 2015: Perimeter Security Intruder Tracking/Classification Using Low-Cost UWB Radar Array

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University of Texas at Austin: ISAR Imaging of a Windmill

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University of Bologna: UWB Multistatic Radars for Obstacle Detection and Imaging in Railroad Crossing Areas

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Worcester Polytechnic Institute (WPI) / Turgut Ozal University / Bilkent University: Multi-Person Tracking with a Network of UWB Radar Sensors Based on Gaussian Mixture PHD Filters

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University of Twente / Chalmers University / Queen’s University Belfast: An Experimental Study of UWB Device-Free Person Detection and Ranging

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Handong University / Gwangju Institute of Science & Technology: Multi-Target Localization of Breathing Humans

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IEEE RADARCON 2012: A Practical High-Performance UWB Radar Platform

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Channel Analysis and Education

ICUWB 2014: Ultra Wideband: A Tool for Teaching Undergraduates

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APS/URSI 2012: High-Fidelity Peer-to-Peer UWB Propagation Measurements in High Multipath Environments using the PulsON 400 UWB Transceiver

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APS/URSI 2012: Channel Analysis Tool (CAT) Presentation

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