Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.

Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.

The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

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

Coordination Distances for Low Observable Diagnostic Measurement Systems

Report ID
October 09, 2013
Saúl Torrico and Brian Downs
The Air Force Life Cycle Management Center Low Observable Supportability Office requested that the Joint Spectrum Center (JSC) support its effort to develop a process to obtain spectrum-certification support for Low Observable Diagnostic Measurement Systems (LODMS) operating within the 100 MHz to 18 GHz frequency range. Specifically, the JSC has been requested to calculate coordination trigger distances between LODMS and incumbent systems operating in the 50 MHz to 18.5 GHz frequency range. These coordination trigger distances will be included in a proposed coordination procedure for LODMS operations to be incorporated into the National Telecommunications and Information Administration’s Manual of Regulations and Procedures for Federal Radio Frequency Management.

Radio Channel Impulse Response Measurement and Analysis

Report ID
NTIA Technical Report TR-11-476
May 02, 2011
Peter Papazian, John Lemmon

Abstract: This paper describes radio channel sounding measurements and analysis using pseudo-noise (PN) codes. It presents a channel sounding model and shows how channel measurements can be made. A measurement system is described that can be implemented using a combination of radio frequency (RF) hardware, high speed analog to digital converters (ADC), and signal processing software. Sampling requirements and models for describing the stochastic nature of the radio channel are discussed.

Wideband Man-Made Radio Noise Measurements in the VHF and Low UHF Bands

Report ID
NTIA Technical Report TR-11-478
July 01, 2011
Jeffery A. Wepman, Geoffrey A. Sanders

Abstract: Man-made radio noise measurements were conducted in a 1.16-MHz bandwidth at 112.5, 221.5, and 401 MHz at two residential and two business locations in the Boulder/Denver, Colorado, area. The measurement frequencies and bandwidth were selected using the results of a spectrum survey performed over the 104– 1060-MHz frequency range. The noise measurement data were collected as a complex baseband noise data record (consisting of six million in-phase (I) and quadrature-phase (Q) samples) every 10 minutes over a 24-hour period for each frequency and location.

In-Building Radio Enhancement Systems for Public Safety

Report ID
NTIA Technical Report TR-11-480
September 01, 2011
Robert J. Achatz, Roger A. Dalke and John J. Lemmon

Abstract: Reliable public safety communications between system repeaters outside a building and portable radios inside a building is often not possible due to building attenuation. To circumvent this problem, increasing numbers of municipalities are requiring building owners to provide in-building radio enhancement systems (IBRESs) for public safety communications. This report is intended to be used by public safety communications professionals who are tasked with assisting building owners to fulfill this requirement.