ARLA/CLUSTER: Existe forma de baixar o ruido e de revitalizar a radio em AM !?

[João Costa > CT1FBF]

Steps to lower noise floor and revitalize AM radio

*RadioWorld* report that background noise interference is degrading the
quality of broadcast reception, two-way communications, mobile cellphone
services and every other form of wireless communications used today at an
alarming rate.

The FCC and the ITU agree that the DC to 60 GHz+ wide-spectrum background
noise floor is increasing as more and more unregulated electronic devices
are used by more consumers in more ways every day.

While it is true that large numbers of these devices have been in use for
some time, the question becomes: What can we do to lower the noise floor
now that the floodgates of unregulated devices have been open for so long?
Is this an impossible task? I believe the answer is an emphatic “no.�

On June 15, 2016, the FCC Office of Engineering and Technology Technical
Advisory Council opened a noise floor technical inquiry in the form of ET
Docket No. 16-191 to seek answers to the following basic questions:

1. Is there a noise problem?

2. Where does the problem exist? Spectrally? Spatially? Temporally?

3. Is there quantitative evidence of the overall increase in the total
integrated noise floor across various segments of the radio frequency
spectrum?

4. How should a noise study be performed?

The most prominent responses were from the American Radio Relay League, the
Society of Broadcast Engineers, the NAB, the National Public Safety
Telecommunications Council, the National Electrical Manufacturers
Association, the State of California Governor’s Office of Emergency
Services Public Safety Communications, Verizon and AT&T.

Unfortunately, most were anecdotal, not accompanied with measured
quantitative data. This is largely because the responders did not have the
instrumentation resources nor the budget to provide the quantitative
evidence being sought.

Despite the scarcity of quantitative data submissions, one clear outcome of
this TAC technical inquiry is an unmistakable consensus among the
responders: A noise floor study is not only needed but overdue.

Read the full RadioWorld article:
http://www.radioworld.com/columns-and-views/0004/steps-to-lower-noise-floor-and-revitalize-am-radio/339995
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