https://urgentcomm.com/wp-content/themes/ucm_child/assets/images/logo/footer-logo.png
  • Home
  • News
  • Multimedia
    • Back
    • Multimedia
    • Video
    • Podcasts
    • Galleries
  • Commentary
    • Back
    • Commentary
    • Urgent Matters
    • View From The Top
    • All Things IWCE
    • Legal Matters
  • Resources
    • Back
    • Resources
    • Events
    • Webinars
    • White Papers
    • Reprints & Reuse
  • IWCE
    • Back
    • IWCE
    • Conference
    • Special Events
    • Exhibitor Listings
    • Premier Partners
    • Floor Plan
    • Exhibiting Information
    • Register for IWCE
  • About Us
    • Back
    • About Us
    • Contact Us
    • Advertise
    • Terms of Service
    • Privacy Statement
    • Cookies Policy
  • Related Sites
    • Back
    • American City & County
    • IWCE
    • Light Reading
    • IOT World Today
    • Mission Critical Technologies
    • Microwave/RF
    • T&D World
    • TU-Auto
  • In the field
    • Back
    • In the field
    • Broadband Push-to-X
    • Internet of Things
    • Project 25
    • Public-Safety Broadband/FirstNet
    • Virtual/Augmented Reality
    • Land Mobile Radio
    • Long Term Evolution (LTE)
    • Applications
    • Drones/Robots
    • IoT/Smart X
    • Software
    • Subscriber Devices
    • Video
  • Call Center/Command
    • Back
    • Call Center/Command
    • Artificial Intelligence
    • NG911
    • Alerting Systems
    • Analytics
    • Dispatch/Call-taking
    • Incident Command/Situational Awareness
    • Tracking, Monitoring & Control
  • Network Tech
    • Back
    • Network Tech
    • Interoperability
    • LMR 100
    • LMR 200
    • Backhaul
    • Deployables
    • Power
    • Tower & Site
    • Wireless Networks
    • Coverage/Interference
    • Security
    • System Design
    • System Installation
    • System Operation
    • Test & Measurement
  • Operations
    • Back
    • Operations
    • Critical Infrastructure
    • Enterprise
    • Federal Government/Military
    • Public Safety
    • State & Local Government
    • Training
  • Regulations
    • Back
    • Regulations
    • Narrowbanding
    • T-Band
    • Rebanding
    • TV White Spaces
    • None
    • Funding
    • Policy
    • Regional Coordination
    • Standards
  • Organizations
    • Back
    • Organizations
    • AASHTO
    • APCO
    • DHS
    • DMR Association
    • ETA
    • EWA
    • FCC
    • IWCE
    • NASEMSO
    • NATE
    • NXDN Forum
    • NENA
    • NIST/PSCR
    • NPSTC
    • NTIA/FirstNet
    • P25 TIG
    • TETRA + CCA
    • UTC
Urgent Communications
  • NEWSLETTER
  • Home
  • News
  • Multimedia
    • Back
    • Video
    • Podcasts
    • Galleries
  • Commentary
    • Back
    • All Things IWCE
    • Urgent Matters
    • View From The Top
    • Legal Matters
  • Resources
    • Back
    • Events
    • Webinars
    • White Papers
    • Reprints & Reuse
    • UC eZines
  • IWCE
    • Back
    • Conference
    • Special Events
    • Exhibitor Listings
    • Floor Plan
    • Exhibiting Information
    • Register for IWCE
  • About Us
    • Back
    • About Us
    • Contact Us
    • Advertise
    • Terms of Service
    • Privacy Statement
    • Cookies Policy
  • Related Sites
    • Back
    • American City & County
    • IWCE
    • Light Reading
    • IOT World Today
    • Mission Critical Technologies
    • Microwave/RF
    • T&D World
    • TU-Auto
  • newsletter
  • In the field
    • Back
    • Internet of Things
    • Broadband Push-to-X
    • Project 25
    • Public-Safety Broadband/FirstNet
    • Virtual/Augmented Reality
    • Land Mobile Radio
    • Long Term Evolution (LTE)
    • Applications
    • Drones/Robots
    • IoT/Smart X
    • Software
    • Subscriber Devices
    • Video
  • Call Center/Command
    • Back
    • Artificial Intelligence
    • NG911
    • Alerting Systems
    • Analytics
    • Dispatch/Call-taking
    • Incident Command/Situational Awareness
    • Tracking, Monitoring & Control
  • Network Tech
    • Back
    • Cybersecurity
    • Interoperability
    • LMR 100
    • LMR 200
    • Backhaul
    • Deployables
    • Power
    • Tower & Site
    • Wireless Networks
    • Coverage/Interference
    • Security
    • System Design
    • System Installation
    • System Operation
    • Test & Measurement
  • Operations
    • Back
    • Critical Infrastructure
    • Enterprise
    • Federal Government/Military
    • Public Safety
    • State & Local Government
    • Training
  • Regulations
    • Back
    • Narrowbanding
    • T-Band
    • Rebanding
    • TV White Spaces
    • None
    • Funding
    • Policy
    • Regional Coordination
    • Standards
  • Organizations
    • Back
    • AASHTO
    • APCO
    • DHS
    • DMR Association
    • ETA
    • EWA
    • FCC
    • IWCE
    • NASEMSO
    • NATE
    • NXDN Forum
    • NENA
    • NIST/PSCR
    • NPSTC
    • NTIA/FirstNet
    • P25 TIG
    • TETRA + CCA
    • UTC
acc.com

content


Editorial Technical report to help system designers and frequency coordinators

Editorial Technical report to help system designers and frequency coordinators

Have you heard that there are two new technologies moving into the 800MHz public safety radio frequency bands? One is frequency-division multiple access
  • Written by Urgent Communications Administrator
  • 1st July 1996

Have you heard that there are two new technologies moving into the 800MHz public safety radio frequency bands? One is frequency-division multiple access (FDMA), and the other is time-division multiple access (TDMA). A way of looking at it is that one uses several narrowband digital channels, and the other uses one wideband digital channel, in a given bandwidth.

The Associated Public-Safety Communications Officials (APCO), which serves as a trade association and a frequency coordinating company for public safety agencies, has been working in conjunction with the Telecommunications Industry Association (TIA) to develop a public safety digital radio standard. As it became apparent that more than one type of digital radio system would be occupying public safety frequencies, TIA began to develop methods to assist in the frequency assignment, design and operation of both types of system so that each one could avoid interfering with the reception of the other.

Spectrum refarming Then, along came spectrum refarming for the private land mobile radio frequencies below 512MHz, affecting both public safety and non-public safety systems. Spectrum refarming means revised regulations that modify existing technical standards and operating conditions. The idea is to make it possible for increasing numbers of transmitters to be used without creating too much interference. The result is going to be a mixture of modulation technologies and bandwidths on frequencies that used to be occupied on 25kHz or 30kHz channel centers by frequency-modulated (FM) radio. What once was fairly simple now becomes quite complex.

The Industrial Telecommunications Association, among other trade associations and frequency coordinating companies, realized that new guidelines would be required to assign frequencies among various narrowband and wideband digital and analog facilities. When ITA started talking with TIA about such guidelines, TIA’s years of experience in working on the public safety digital radio standard were applied and expanded in helping to create a blueprint for coordinating frequencies in the spectrum refarming environment.

Joint TIA-IEEE project Working together with the Institute of Electrical and Electronics Engineers’ (IEEE) Vehicular Technology Society (VTS) propagation committee, among other participants, the TIA’s working group on technology compatibility (designated WG 8.8) set about to create a document that frequency coordinators, system designers and manufacturers could use to place new radio communications systems within the radio spectrum and within geographic areas for the best results. Actually, the document will serve as a basis for writing computer software to automate the processing of license applications using system specifications and terrain data in ways that pre-computer methods could not.

Are you ready for the name of the document? “A Report on Technology-independent Methodology for the Modeling, Simulation and Empirical Verification of Wireless Communications System Performance in Noise- and Interference-limited Systems Operating on Frequencies Between 30 and 1,500 MHz.” Whew. “For decades, the wireless industry has been in need of an objective, accurate means of assuring wireless systems are properly designed, tested and validated,” said Gregory M. Stone, Ph.D. E.E., a co-chairman of WG 8.8 and chairman of the IEEE VTS propagation committee. “In addition, there has been a critical need for a fair and objective empirical method of resolving interference disputes. The efforts of the TIA and IEEE have appeared to pay off with the newly released report.”

Reactions ITA seems to be pleased with the document. “It will lead to better use of the spectrum compared to previous engineering methods,” said Sharpe Smith, ITA manager of communications and public affairs. “We support the development of these guidelines. We not only support, but we have proactively attempted to bring the process into the refarming realm. We’re not just giving it lip service, we’re showing up at the meetings, and we’re providing input. We think it important to the success of the post-refarming environment to have these guidelines.”

APCO’s executive director Ronnie Rand said that although it appears that some of the document may be complex for frequency advisers, “It appears to be a useful document. We view it as something that can be helpful in the coordination process. It is obvious that the people who worked on it took their task very seriously.” Rand also said that the suggestion that perhaps the FCC should publish the document and ask for public comment has been discussed.

Stone said that the joint TIA-IEEE effort enjoyed widespread land mobile industry and user community support. In addition to contributions made by APCO and ITA, he cited Ericsson, Motorola and the U.S. Immigration and Naturalization Service (INS). An acknowledgment published in the report says that the genesis of the document is the brainchild of Carl B. “Bernie” Olson, director of resource development engineering for Motorola’s National Engineering Services. It credits the following with substantive contributions: Harry Anderson, Ph.D., EDX Engineering; Dominic Acuri, Ericsson; John Oblak, E.F. Johnson; Brad Hiben, Tom Rubinstein, Casey Hill and Al Wieczorek, Motorola; and Judith F. Furie, INS. The INS provided additional staff and resources to produce the document.

Results Congress and the FCC pass their laws and regulations. Manufacturers create their equipment specifications. Operators for proposed communications systems design their facilities. Frequency coordination companies recommend or select radio channel assignments. Along the way, engineers and technicians have the responsibility to make communications systems function within the framework created by regulation, frequency coordination and available equipment.

We hope the TIA document will result in software development, frequency coordination procedures and regulatory policies that will help spectrum refarming to provide the improved services and expansion of the number of users that are expected. Our congratulations to the participants who drafted the document. –Don Bishop

Tags: content

Related


  • Newscan: A look at the critical job of 911 dispatchers
    Newscan: A look at the critical job of 911 dispatchers
    Also: NYC launches website for tracking 911 response times; Oregon implements 911 on pre-paid cell phones; LightSquared wants to keep spectrum assets; Harris receives multiple government orders; FCC extends rebanding financial reconciliation deadline; Zetron gear at core of communications system upgrade; Ritron debuts wireless access control system; EWA seeks policy review of VHF vehicular repeater system deployments.
  • Newscan: Missouri county may have to drop 911 if sales-tax hike fails
    Newscan: Missouri county may have to drop 911 if sales-tax hike fails
    Also, feds experiment with helium balloons for deployable emergency communications; Meru Networks creates Wi-Fi bundles for the education sector; PowerTrunk partners with Potomac Spectrum Partners to promote TETRA; Raytheon debuts advanced targeting sensor system for U.S. Army; BioRx smartphone app tracks, shares hemophilia healthcare info; U.S. Army increases value of contract with Harris; AdvanceTec introduces multi-unit two-way radio charger; iPAD Air scheduled to debut on Nov. 1; FAA deploys Harris dual-core network infrastructure; fire district wins grant for mobile emergency dispatch system; EWA endorses first recipient of Vestal scholarship.
  • CMA conducts 40th conference this week
    CMA conducts 40th conference this week
    Event gives independent representatives and distributors an efficient way to learn about--and get training on--manufacturers products, while they network and discuss key trends and issues.
  • Newscan: Government shutdown puts FCC in a bind
    Newscan: Government shutdown puts FCC in a bind
    Also: An open spectrum auction is best for consumers and public safety; California police department trials Polaris Wireless tracking solution; AT&T, GE sign M2M communications agreement; Time Warner Cable cites need for Wi-Fi spectrum; Verizon blog explores deregulation of legacy wireline networks; and the NSA says it has "mitigated" meltdowns at Utah data farm.

Leave a comment Cancel reply

To leave a comment login with your Urgent Comms account:

Log in with your Urgent Comms account

Or alternatively provide your name, email address below:

Your email address will not be published. Required fields are marked *

Related Content

  • Photo gallery: 2014 Communications Marketing Conference (CMC) in Tucson
  • RCA plans to expand this year's Technical Symposium
  • Newscan: New ordinance may result in jail time for 911 abusers
  • Newscan: Senator wants inventory of government spectrum

Commentary


Public safety needs a better way to triage emergency calls

13th January 2021

In challenging year, working with public safety to move FirstNet forward

30th December 2020

Communications solutions must evolve quickly to meet needs of a changing world

31st October 2020
view all

Events


UC Ezines


IWCE 2019 Wrap Up

13th May 2019
view all

Twitter


UrgentComm

RT @IWCEexpo: 📆 Mark Your Calendars: IWCE will be returning to Las Vegas this September and registration is slated to open in April 📆 Wa…

15th January 2021
UrgentComm

RT @IWCEexpo: ⚡FLASH SALE: Don't miss this exclusive offer! Passes to #IBFVirtual are now 50% off with code TWITTER50. Take advantage of th…

6th November 2020
UrgentComm

Get ready for part 2 of "Ensuring Public Safety Emergency Communications" next week! @PCTEL_inc will explore… twitter.com/i/web/status/1…

3rd November 2020
UrgentComm

Over the past few months, we’ve seen the world transform, and it's clear that cities will be affected in the long-t… twitter.com/i/web/status/1…

27th October 2020
UrgentComm

Florida state & local agencies subscribing to the Statewide Law Enforcement Radio System (SLERS) will be able to co… twitter.com/i/web/status/1…

26th October 2020
UrgentComm

Tune in to @slacorp CEO Josh Lober as he explains how the company has fully integrated its #PTT application to work… twitter.com/i/web/status/1…

26th October 2020
UrgentComm

.@SierraWireless announced the commercial availability of the AirLink MG90 platform, which they tout as the first m… twitter.com/i/web/status/1…

26th October 2020
UrgentComm

Attorneys for #Hytera and #MotorolaSolutions this week submitted final written arguments, apparently clearing a pat… twitter.com/i/web/status/1…

22nd October 2020

Newsletter

Sign up for UrgentComm’s newsletters to receive regular news and information updates about Communications and Technology.

Expert Commentary

Learn from experts about the latest technology in automation, machine-learning, big data and cybersecurity.

Business Media

Find the latest videos and media from the market leaders.

Media Kit and Advertising

Want to reach our digital and print audiences? Learn more here.

DISCOVER MORE FROM INFORMA TECH

  • American City & County
  • IWCE
  • Light Reading
  • IOT World Today
  • Mission Critical Technologies
  • Microwave/RF
  • T&D World
  • TU-Auto

WORKING WITH US

  • About Us
  • Contact Us
  • Events
  • Careers

FOLLOW Urgent Comms ON SOCIAL

  • Privacy
  • CCPA: “Do Not Sell My Data”
  • Cookies Policy
  • Terms
Copyright © 2021 Informa PLC. Informa PLC is registered in England and Wales with company number 8860726 whose registered and Head office is 5 Howick Place, London, SW1P 1WG.
This website uses cookies, including third party ones, to allow for analysis of how people use our website in order to improve your experience and our services. By continuing to use our website, you agree to the use of such cookies. Click here for more information on our Cookie Policy and Privacy Policy.
X