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Institute for Telecommunication Sciences
the research laboratory of the National Telecommunications and Information Administration

What We Do

The Institute for Telecommunication Sciences (ITS) performs cutting-edge telecommunications research and engineering with both federal government and private sector partners. As its research and engineering laboratory, ITS supports NTIA by performing the research and engineering that enables the U.S. Government, national and international standards organizations, and many aspects of private industry to manage the radio spectrum and ensure that innovative, new technologies are recognized and effective. ITS also serves as a principal Federal resource for solving the telecommunications concerns of other Federal agencies, state and local Governments, private corporations and associations, and international organizations. The FY 2015 Technical Progress Report describes research performed in the past fiscal year.

Register now for ISART 2017!

ISART 2017: Spectrum Mining at Millimeter Waves Set for August 15-17 in Broomfield, Colorado

Digging for Capacity: As more spectrum users squeeze into the lower frequency bands, more are also exploring the higher frequencies to meet their capacity needs. Millimeter wave frequencies, approximately 20 GHz and above, are able to meet some needs. ISART 2017, the 16th in this series of high quality symposia will explore millimeter waves, the technical challenges they present, and applications that use them. This year’s tutorial and four panels will approach this topic from five different perspectives: regulation, industry, standards, measurement and modeling, and systems. Industry demonstrations and poster sessions from academia will round out the conference. The goal of ISART 2017 is to get us all talking, exploring new ideas, brainstorming, and perhaps even solve a couple of millimeter wave obstacles. To take advantage of potential synergies, a CSMAC meeting and a WSRD meeting are scheduled during the same week. Read more here, check out the Draft Agenda and the Panel Descriptions, and register here.

Research Spotlight: A Promising Crowdsourcing Research Experiment

The results are in—when it comes to speech intelligibility testing, the crowd and human subjects in a lab have a lot in common. Initial results from a crowdsourced speech intelligibility test designed by ITS align closely with similar testing done in the lab. Since crowdsourced testing requires significantly less time and money than laboratory testing, this could help ITS quickly gather large amounts of high-quality speech intelligibility data as part of a more efficient overall test plan.

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ITS Open Sources the Extended-Hata Urban Propagation Model

Evolving and improving the science behind spectrum sharing is essential to NTIA’s commitment to meeting the demand for spectrum among federal and commercial users. Just as collaboration between spectrum users can unlock sharing opportunities, researchers can work together to advance spectrum efficiencies and mitigate interference.

ITS has taken a major step toward better collaboration by publishing a reference implementation of the Extended-Hata Urban Propagation Model (eHata) in the NTIA/ITS GitHub at https://github.com/NTIA/ehata. ITS created eHata to predict propagation of new commercial broadband services in the 3.5 GHz band. An analysis of those predictions enabled regulators to significantly expand commercial access to the 3.5 GHz band through the establishment of the Citizens Broadband Radio Service (CBRS). The analysis was presented in Technical Report TR-15-517: 3.5 GHz Exclusion Zone Analyses and Methodology. The analysis was based on propagation predictions performed by extending the Hata model, a radio propagation model for outdoor cellular transmissions at 150-1500 MHz that considers the effects of diffraction, reflection, and scattering caused by city structures. To predict propagation of new commercial broadband services in the 3.5 GHz band, NTIA engineers extended the Hata model in both frequency and distance, creating the Extended-Hata Urban Propagation Model (eHata).

The Hata propagation model considers the effects of diffraction, reflection, and scattering caused by city structures for outdoor cellular transmissions at 150-1500 MHz. NTIA engineers created eHata by extending the Hata model in both frequency and distance. By providing an open source implementation that is freely available for use and re-use, ITS hopes to advance development of widely accepted propagation models. Rather than duplicating efforts with competing versions of eHata, researchers can focus on enhancing and improving the open source implementation.

The Wireless Innovation Forum’s Spectrum Sharing Committee, which is developing the technical standards for the Spectrum Access System (SAS) that will enable commercial operations in the 3.5 GHz band, has proposed using eHata to calculate coverage and protection areas. WInnForum can now use or adapt the ITS source code for propagation prediction and focus their efforts on developing other aspects of the SAS functional architecture. The code can also allow other organizations and researchers that are interested in urban propagation modeling to engage with ITS to explore how best to model urban environments.

Whereas papers and reports disseminate knowledge unidirectionally, open source code repositories allow for two-way collaboration between ITS and the research community. ITS plans to continue to release open source reference implementations as it adds to the body of basic research on radio propagation modeling. These releases transfer the results of federally funded research and technology development to other researchers in this area, allowing other federal agencies as well as industry to leverage 100 years of ITS research expertise to address current and future spectrum issues.

 

New Publications

This Month in ITS History

April 1950: Boulder Chamber of Commerce Begins Fundraising to Attract CRPL

On April 11, 1950, the citizens of the city of Boulder, Colorado kicked off a campaign to raise money to guarantee the Department of Commerce’s new laboratory would be built in the city. With the help of Senator Ed Johnson (D-CO) and Ed Condon, the director of the National Bureau of Standards (NBS), Boulder had been chosen to house the new NBS lab in December of the previous year. But the decision was based in part on the promise that land for the labs would be supplied by the City. The Chamber of Commerce started a newspaper advertising campaign in April that compared donated money to insurance premiums. “For a premium of $70,000 the community is assured a $2,000,000 annual dividend in the form of payroll and employment opportunities,” the ads promised. Within nine days the citizens and businesses of Boulder and surrounding communities had raised $93,629.58, easily surpassing their goal. The Radio Building, where ITS is still located, was completed in 1954 and dedicated by President Eisenhower on September 13. The citizens of Boulder received even higher dividends on the money they invested than the advertising had promised: by 1959 the lab's payroll was injecting over $4 million into the area’s economy and attracting visiting scientists from around the world. Boulder's current reputation as a center of scientific and technical innovation with a strong startup economy owes much to the researchers who have been attracted to Boulder over the years by the presence of NBS, ITS, other Commerce and federal laboratories laboratories, and the University.