Search Results
The search returned 1,237 publication(s) on its.ntia.gov.
This report describes the objective testing of various vocoders, both singly and in different combinations of tandem configurations, to evaluate overall voice quality in an objective manner. The objective test evaluation was performed using a standa...
This guide focuses on a key portion (subsystem) of the radio communications system--the antenna system. Although the antenna itself may be the most visible element of radio communications equipment, it is often the least understood. This guide defin...
The President signed an executive memorandum dated October 13, 2000, that stated the need and urgency for the United States to select radio frequency spectrum to satisfy the future needs of the citizens and businesses for mobile voice, high-speed dat...
The study described in this report was undertaken by the National Telecommunications and Information Administration (NTIA) in response to a Federal Communications Commission (FCC) Notice of Proposed Rule Making (NPRM) concerning the operation of a ne...
This report describes laboratory measurements of Global Positioning System (GPS) receiver vulnerability to ultrawideband (UWB) interference. The laboratory measurements were performed by inserting increased levels of UWB interference until an operat...
Ultrawideband (UWB) technology, useful for both communication and sensing applications, uses the radio spectrum differently than the vast majority of radiocommunication technologies. UWB systems make use of narrow pulses and time-domain signal proce...
The Institute for Telecommunication Sciences (ITS) is the research and engineering laboratory of the National Telecommunications and Information Administration (NTIA) of the U.S. Department of Commerce (DOC). ITS provides technical support to NTIA in...
On behalf of the Secretary of Commerce, the National Telecommunications and Information Administration (NTIA) has prepared this report to the President and the Congress as required by Title X of the National Defense Authorization Act for Fiscal Year...
High level electromagnetic fields can upset and damage electronics, as well as disrupt or disable computer software. Thus, high power radio frequency (RF) fields pose a threat to critical infrastructures such as telecommunications. This report examin...
Radiowave propagation measurements at Ft. Hood, Texas are described. These measurements were made as part of the Flexible Interoperable Transceiver (FIT) Program. The objective of the measurements is to define communication link requirements at 440,...
Radiowave propagation measurements at Edwards Air Force Base, CA are described. These measurements were made as part of the Flexible Interoperable Transceiver (FIT) Program. The objective of the measurements is to define communication link requireme...
This paper identifies optimum levels of reverse water-filling for codebook-based coding of noise and speech signals. We find that there is little to be gained from optimizing an effective rate parameter. We identify trade-offs between SNR and log-spe...
The Institute for Telecommunication Sciences, part of the National Telecommunications and Information Administration, has a long-standing program to develop radio channel measurement systems. This paper briefly reviews selected examples of recent me...
In this study we investigated the geometric optics (GO) approximation to the fields of an incremental electric dipole above a half plane for geometries typical of wireless indoor communications. This inspection was motivated by efforts to establish ...
The availability of the radio spectrum in the United States is critical to over 40 radio services that provide functions ranging from air traffic control to amateur radio operations. Although the radio frequency spectrum is not a consumable resou...
The Coast Guard funded the National Telecommunications and Information Administration (NTIA) to perform electromagnetic compatibility (EMC) tests between an ITU-R M. 825-3 (Characteristics Of a Transponder System Using Digital Selective Calling Tech...
This is a joint report of the National Telecommunications and Information Administration (NTIA) and the Rural Utilities Service (RUS) in response to a request by ten U.S. Senators that NTIA and RUS examine six issues related to the availability and d...
This study is an update to a 1993 ITS staff study entitled “A preliminary look at spectrum requirements for the Fixed Services.” That study included a description of the services provided in 30 of the Government and non-Government frequency bands be...
One of the questions that ongoing QoS efforts seek to answer is: “Given fixed network resources, how does one provide the highest possible quality of service to the maximal number of users in a fair way, even when those users are generating competin...
This report describes measurement, modeling, and simulation methods that are used to analyze the relationship between nonlinear operation of a typical PCS portable transceiver power amplifier and battery current, out-of-band power, and link margin. ...