Breaking News
Comments
Newest First | Oldest First | Threaded View
AZskibum
User Rank
Author
Re: Sounds like one does in RF modulation
AZskibum   12/11/2013 12:10:53 AM
NO RATINGS
I was thinking the same thing -- this is what RF digital comms engineers have done for many decades. The cleverness of their technique appears to be the generation of a perfect "picket fence" of rectangular spectra in the frequency domain -- which inherently results in raised cosine pulses in the time domain. I have to agree with the comment from the researcher, that it's hard to believe nobody thought of this before.

daleste
User Rank
Author
Re: great research
daleste   12/10/2013 9:56:51 PM
NO RATINGS
A 25% increase isn't the same as 10X.  Thanks for the feedback.  Guess we have to be careful of believing everything we read.

TanjB
User Rank
Author
Re: great research
TanjB   12/10/2013 3:15:21 PM
NO RATINGS
The original paper

http://www.nature.com/ncomms/2013/131204/ncomms3898/full/ncomms3898.html

makes no claim of 10x.  That was added by the University PR.  You really, really have to learn to avoid repeating the PR spam.

The paper quantifies about a 25% gain relative to OFDM found in a related investigation of Sinc pulses, but does not say they achieved that.

Bert22306
User Rank
Author
Sounds like one does in RF modulation
Bert22306   12/9/2013 7:46:15 PM
NO RATINGS
If I read this correctly, the idea of shaping the optical symbols to cram as many symbols/sec as possible is what RF engineers have done for a long time. Using smooth shapes, a typical example being the "raised cosine curve," you can reduce the bandwidth of the medium, for any given data carrying capacity.

daleste
User Rank
Author
great research
daleste   12/9/2013 7:16:28 PM
NO RATINGS
Increasing bandwidth with a transmitter change will be great for the industry.  Not having to replace the optical medium could be an easy upgrade path for existing deployments.  Thanks for the work and learning.



Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Radio
NEXT UPCOMING BROADCAST

What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.
Like Us on Facebook
Special Video Section
LED lighting is an important feature in today’s and future ...
05:27
The LT8602 has two high voltage buck regulators with an ...
05:18
The quality and reliability of Mill-Max's two-piece ...
01:34
Why the multicopter? It has every thing in it. 58 of ...
Security is important in all parts of the IoT chain, ...
Infineon explains their philosophy and why the multicopter ...
The LTC4282 Hot SwapTM controller allows a board to be ...
This video highlights the Zynq® UltraScale+™ MPSoC, and sho...
Homeowners may soon be able to store the energy generated ...
The LTC®6363 is a low power, low noise, fully differential ...
See the Virtex® UltraScale+™ FPGA with 32.75G backplane ...
Vincent Ching, applications engineer at Avago Technologies, ...
The LT®6375 is a unity-gain difference amplifier which ...
The LTC®4015 is a complete synchronous buck controller/ ...
10:35
The LTC®2983 measures a wide variety of temperature sensors ...
The LTC®3886 is a dual PolyPhase DC/DC synchronous ...
The LTC®2348-18 is an 18-bit, low noise 8-channel ...
The LT®3042 is a high performance low dropout linear ...