NASA's JPL (Jet Propulsion Laboratory) and UCLA are looking
to ride the Wearables craze now sweeping America according to analyst IDC in my
Geezam blog article “Analyst
IDC logs Wearables Profitable in Q1 2015 Fitness Tracker Business”.
On Wednesday July 22nd 2015 they announced the developement
of a Wi-Fi Signal Processor that uses a lot less power as reported in the article
“NASA
invents Wi-Fi Chip that requires virtually no Battery power”, published 27
JUL 2015, by David Witmer, IGN.
NASA's JPL, located at CalTech (California Institute of
Technology) made the announcement on their website in a Press Release entitled “A Wi-Fi Reflector
Chip To Speed Up Wearables”, published JULY 22, 2015, NASA JPL.
The team consisting of Dr. Adrian Tang of NASA's JPL in
Pasadena, California and Dr. M.C. Frank Chang at the UCLA (University of
California, Los Angeles) have being toiling away at the idea of low-powered
Wi-Fi transmitters for Wearables.
Wi-Fi uses a technology closely related to CDMA (Code
Division Multiple Access), which being related to spread Spectrum, uses a lot
of power.
This achievement is significant as not only did they reduce
the power consumption of the wearable involved in transmitting Data to the Router
but they resulted in a significant speed boost of up to 330 Mbps over a
distance of 2.44 m (8 ft).
This is on part with Wi-Fi Direct but at 100 times less
power, making this technically a breakthrough in lower power Transmission, as
the alternative, bigger, more power dense batteries, seemed unlikely.
So how exactly does this work? First, let me tell you about
a cartoon named Laser Tag!
NASA's JPL and
UCLA invent Low power Wi-Fi - How Laser Tag reduces Wi-Fi Power Consumption in
a Wearable
It works by the absorption and reflection of Wi-Fi signal
emitted by the Router for the purposes of Data transmission as explained in the
article “NASA
collaborates with UCLA for next-gen Wi-Fi chip”, published July 27, 2015 by
Brad Jones, Digitaltrends.
This is a lot like a game I used to play when I was six (6)
years old at Midland Preparatory School which I attended in May Pen, Clarendon.
In that game we use mirrors to flash light signals at each other, mimicking the
cartoon Laser Tag.
Being impoverished but creative children, we used our imaginations
instead and improvised. So no laser guns, but mirrors taken out of pencil sharpeners
that back then came with a little circular mirror.
We then had everyone in the game wearing something shiny, like a reflector on their shirt pocket and as typical of the game of tag, we had a safe house or “dent” as we Jamaicans called it.
Then we'd run out and chase each other with the aim of shining
the light directly into the reflective patch on our shirts. Because it's
reflective, anyone who saw you reflector badge light up from under the shady
tree aka the “dent” would know that you got tagged, as you couldn't cheat.
The Wi-Fi Signal Processor works on a similar principle of
reflection to transmit Data back to the Router, which does all the heavy
lifting of transmission, resulting in the Wearable just being a passive
receiver as noted in the article “A Wi-Fi
reflector chip to speed up wearables”, published July 23, 2015 by Elizabeth
Landau, PhysOrg.
Whenever the reflector needs to transmit Data, merely
reflects or absorbs of the incoming Wi-Fi signal, with absorbed energy
representing a binary “0” and reflected energy representing a binary “1”.
The Wi-Fi Signal Processor uses a simple switch mechanism to
switch between absorption and reflection, which the Router, whose software has
been modified, can detect as transmission from the device.
But is that al for the Router? Or does it also need to use
the Wi-Fi Signal Processor? And what about reflection from the Walls?
NASA Squelch
Discriminator circuit sifts out reflection - Wearables potentially can last
Months instead of days
The result is that the Wearable uses very little energy,
only decoding the CDMA Signal while using reflection/absorption to transmit
back binary “0” and binary “1” to the Router. Not only does this result in
faster Data transmission but also reduced power usage by the Laptop, smart
phone, tablet or smartwatch receiving the Data.
From August 2, 2015 |
It however, means that the Router has to be a device that's
either plugged in or has a large battery source and fairly close by, which fits
the Wi-Fi Direct scenario I mentioned earlier.
However the walls also reflect Wi-Fi signal, which would
confuse the Wi-Fi Router that's receiving Data from the Wearable as
reflection/absorption of its own Wi-Fi signal. To overcome this, Dr. Adrian
Tang and Dr. M.C. Frank Chang developed a Squelch Discriminator circuit to
differentiate between reflected Wi-Fi from the walls and reflected/absorbed Wi-Fi
coming from the Laptop, smart phone, tablet or Smartwatch.
This suggests that the Wi-Fi Signal Processor with the
Squelch Discriminator circuit has to be installed in BOTH the wearable device
as well as the Routers.
Wearables maker Apple and their Apple Watch already poised
to take the No. 1 spot as explained in my blog article
entitled “IDC
Stats for Wearables in the First Quarter of 2015 - US$13 Mi Band Fitness
Monitor Xiaomi No. 2 as Apple Watch to dominate Smartwatch segment by Q4 2015”
could benefit from this tech, with their Smartwatch lasting for months instead
of a single day.
Something tell me though, that NASA is gonna play with this
in on the ISS (International Space Station) for awhile before they release this
new proprietary tech for Commercial usages.
That way, it's space-tested and coming down to Earth to
makes Wearables last for Days instead of hours!
No comments:
Post a Comment