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Spectrum Engineering Reports

NOTE: These reports are available either on-line in PDF (portable document) format or only as hard-copy. If you would like a copy of a report that is not available electronically, please make note of the document number and submit your request to:

NTIA Office of Spectrum Management
System Engineering and Analysis Division
Tel. (202) 482-2608
Fax (202) 482-4595
e-mail edrocella@ntia.gov

Broadband Spectrum Survey in the San Diego, California, Area

Report ID
NTIA Technical Report TR-14-498
November 01, 2013
Chriss A. Hammerschmidt

Abstract: NTIA is responsible for managing the Federal Government’s use of the radio spectrum. In discharging this responsibility, NTIA uses the Radio Spectrum Measurement Sciences system to collect spectrum occupancy data for radio frequency assessments. This report shows measured frequency data spanning spectrum from 108 MHz to 10 GHz in the metropolitan area of San Diego, California, during the months of May and June 2012..

Report re-issued with three corrected images in March 2014.

Effects of Radar Interference on LTE Base Station Receiver Performance

Report ID
NTIA Technical Report TR-14-499
December 01, 2013
Frank H. Sanders, John E. Carroll, Geoffrey A. Sanders, Robert L. Sole

Abstract: In response to proposals to introduce new radio systems into 3550–3650 MHz radio spectrum in the United States, the authors have performed measurements and analysis on effects of interference from a variety of radar waveforms to the performance of a Long Term Evolution (LTE) base station receiver. This work has been prompted by the possibility that LTE base station receivers may eventually share spectrum with radar operations in this spectrum range. The base station receiver that was tested used time division duplex (TDD) modulation.

Spectrum Occupancy Measurements of the 3550–3650 Megahertz Maritime Radar Band Near San Diego, California

Report ID
NTIA Technical Report TR-14-500
January 02, 2014
Michael Cotton and Roger Dalke

Abstract: This report presents spectrum occupancy data of the 3550–3650 megahertz (MHz) maritime radar band measured in June 2012 near San Diego. In this band, the military operates SPN-43 air marshaling radar systems with well-defined signal characteristics. A measurement system and frequency-swept technique were designed specifically to detect SPN-43 emissions.

Broadband Spectrum Survey in the Chicago, Illinois, Area

Report ID
NTIA Technical Report TR-14-502
April 01, 2014
Chriss Hammerschmidt

Abstract: NTIA is responsible for managing the Federal Government’s use of the radio spectrum. In discharging this responsibility, NTIA uses the Radio Spectrum Measurement System to collect spectrum occupancy data for radio frequency assessments. This report shows measured frequency data spanning spectrum from 108 MHz to 10 GHz in the metropolitan area of Chicago, Illinois, during a two week period in September 2012.

EMC Measurements for Spectrum Sharing Between LTE Signals and Radar Receivers

Report ID
NTIA Technical Report TR-14-507
July 01, 2014
Frank H. Sanders, John E. Carroll, Geoffrey A. Sanders, Robert L. Sole, Robert J. Achatz, Lawrence S. Cohen

Abstract: In response to proposals to introduce new Long Term Evolution (LTE) microcell Citizens Broadband Service (CBS) radio systems into 3550–3650 MHz (3.5 GHz) radio spectrum in the United States, the authors have performed measurements and analysis on effects of LTE interference on the performance of a type of radar receiver that might eventually share spectrum with such systems. LTE and Gaussian noise interference were injected into a radar receiver; Gaussian noise was a proxy for aggregated interference sources and one type of LTE.

Effects of Radar Interference on LTE (FDD) eNodeB and UE Receiver Performance in the 3.5 GHz Band

Report ID
NTIA Technical Report TR-14-506
July 01, 2014
Geoffrey A. Sanders, John E. Carroll, Frank H. Sanders, Robert L. Sole

Abstract: In response to proposals to introduce new radio systems into 3.5 GHz radio spectrum in the United States, the authors have performed measurements and analysis on effects of interference, from a variety of radar waveforms, to the performance of a prototype 3.5 GHz Long Term Evolution (LTE) network, consisting of one base station (an eNodeB) and one client (referred to as user equipment or UE) utilizing frequency-division duplexing (FDD).

Fourth Interim Progress Report on the Ten-Year Plan and Timetable

June 05, 2014

NTIA releases this Progress Report pursuant to the Presidential Memorandum issued on June 28, 2010, which directed the Department of Commerce, working through NTIA and in collaboration with the Federal Communications Commission (FCC), to identify and make available 500 megahertz of spectrum over the next ten years for expanded wireless broadband use.  This report includes the plan for federal agencies to provide quantitative assessments of their usage of spectrum in selected frequency bands in accordance with the Presidential Memorandum issued on June 14, 2013.

Seventh Annual Progress Report on the Relocation of Federal Radio Systems from the 1710-1755 MHz Spectrum Band

April 03, 2014

Section 207 of the Commercial Spectrum Enhancement Act (CSEA), Title II of P.L. 108-494 requires annual reporting on federal agencies’ progress to vacate certain wireless communications systems from the 1710 megahertz (MHz) to 1755 MHz radio spectrum that has been reallocated to commercial use. NTIA published the first annual report to Congress on April 17, 2008. That report covered relocation activity occurring over the period March 2007 through December 2007.

Tabulations of Propagation Data over Irregular Terrrain in the 230-TO 9200-MHz Frequency Range Part IV: Receiver Site in Grove of Trees

Report ID
OT/TRER 19
October 01, 1971
P. L. McQuate, J.M.Harman, M. E. McClanahan
Abstract

This is the fourth part of a four-part report containing tabulations and graphs of transmission loss data resulting from propagation experiments in the 230 - to 9200-
MHz frequency range conducted over irregular terrain in Colorado. This part presents data obtained at a Common receiver site, located in a small grove of cottonwood
(Populus deltoides) trees, over propagation paths varying in length fro 0.5 to 50 km.


Key Words: UHF propagation data, irregular terrain, UHF
propagation through trees

A Wave Hop Propagation Program for an Anisotropic Ionosphere

Report ID
OT/ITS RR 11
April 01, 1971
L.A. Berry, J. E. Herman
Abstract

This report documents a digital computer program for computing the propagation of LF and VLF radio waves using the wave hop theoryo It supersedes NBS Report 8889. The documentation includes a description of the physical model, detailed mathematical formulas, a main function flow chart, a listing of the FORTRAN source deck, and the input and output of a sample caseo