MathJax

Friday, August 21, 2009

How do you get gigabit per second over the air?

This question is still keeping my awake during the night.
  • Multiple bits per symbol is a given; there is simply no technology out there that can digitize at gigasample per second.
  • Multiple antenna - how do you pack up to four antenna to a device? I can picture that being possible on a decent sized laptop, at 5GHz or more, over short distance with a favourable channel.
  • Getting gigabits to the home. This becomes a question of what type of infrastructure is required to do just that. Fiber to the home, and a wireless access point (femtocell). A cell tower managing hundreds of gigabits of data over the air will be challenging.
  • A lot has to take place, similar to idea of fuel cell vehicles. Infrastructure is a significant issue.

Saturday, August 08, 2009

Simulations

It appears most simulations are done in a Linux environment. Research tools are both open and actively worked on by the academic community as well as the industry.

However, a fair amount of practical implementation tools are developed on Window.

Friday, August 07, 2009

Survey of the disciplines in communications research

The study of communications encompasses the following theories
  • Information theory
  • Coding theory
  • Dectection theory
  • Control theory
  • Network theory
  • Computation theory
  • Game theory
The underlying fundamentals consist of
  • Linear systems and signals
  • Statistics and random processes
  • Antenna & wave propagation
Simulations
  • Large Deviation Theory
  • Importance sampling
Implementation level
  • DSP and alogrithms
  • RF/Microwave circuits
  • Embedded systems

Thursday, August 06, 2009

Illustrations in Latex documents

I've searched around for tools to help with creating diagrams. The closest contender seems to be something that is vector based and supports importing and exporting eps format.

One expensive choice is Adobe Illustrator + MathType. Even at student price, Illustrator is still prohibitively $$$.

A good contender is Inkscape but it's not mature enough for dealing with importing eps equations and editing them in place.