ARLA/CLUSTER: Uma nova abordagem às rede sem fio para multi-utilizadores.

[João Costa > CT1FBF]

Já aqui chamada a atenção pelo Pedro Ribeiro (CT7ABP) no topico: "
DIDO - Tecnologia que promete muito maior capacidade nas redes sem
fios (e via HF??)".

A new approach to multi-user wireless

Radio amateur Dr. Antonio Forenza AG6NA has published a paper on
Distributed-Input-Distributed-Output (DIDO) Wireless Technology which
can be used for HF Near-Vertical Incidence Skywave (NVIS)

The paper, which was co-authored with Rearden Companies CEO Steve
Perlman, says:

Distributed-Input-Distributed-Output (DIDO) wireless technology is a
breakthrough approach that allows each wireless user to use the full
data rate of shared spectrum simultaneously with all other users, by
eliminating interference between users sharing the same spectrum. With
conventional wireless technologies the data rate available per user
drops as more users share the same spectrum to avoid interference, but
with DIDO, the data rate per user remains steady at the full data rate
of the spectrum as more users are added.

DIDO works indoor/outdoor for urban/suburban applications at distances
of several miles, and for rural applications, DIDO works at distances
up to 250 miles [400 km - NVIS].

A key limitation for data communications using the HF bands that work
with NVIS is that they are very narrow and a large percentage of the
HF band would have to be used to provide sufficient data rate for
broadband applications to even one user in the entire 500-mile area.
Of course, DIDO would be an ideal technology to overcome this
limitation because a large number of users can simultaneously use all
of the available spectrum, each receiving the full data rate available
in the HF channel.

Download the paper at
http://www.rearden.com/DIDO/DIDO_White_Paper_110727.pdf

Read the IEE article at
http://spectrum.ieee.org/tech-talk/telecom/wireless/
5g-service-on-your-4g-phone

A 2011 Bloomberg article says tests to date have been conducted on the
amateur radio spectrum with a maximum of 10 people communicating
simultaneously, see
http://www.businessweek.com/magazine/the-edison-of-silicon-valley-07272011.html#p5

Rearden Companies [named after character in Ayn Rand book Atlas Shrugged]
http://www.rearden.com/

Radio amateur develops experimental wireless technology
http://www.southgatearc.org/news/july2011/dido_technology.htm



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