Posts filed under ‘codecs’

Are you Ready for PhotoBOTS?

Photobots are based on my GIF 2.0 concept, which is to create video
previews using animated gifs for BLOGS, photobots as I see it, can
replace your traditional embed JPG image of a person.

photobot
To view more photobots, please check out www.justplays.com/photobot

November 20, 2006 at 11:34 pm Leave a comment

I was dumb, then I found the “Perfect Space Time Block Codes”

from the introduction
In order to achieve very high spectral efficiency over wireless channels, it is known that we needmultiple antennas at both transmitter and receiver ends. We consider the coherent case where the receiverhas perfect knowledge of all the channel coefficients. It has been shown [31] that the main code designcriterion in this scenario is the rank criterion: the rank of the difference of two distinct codewords hasto be maximal. If this property is satisfied, the codebook is said to be fully diverse. Once the differencehas full rank, the product of its singular values is nonzero, and is defining the coding gain. Maximizingthe coding gain is the second design criterion. Extensive work has been done on designing Space-Time
codes that are fully diverse.

April 26, 2006 at 9:39 am 1 comment


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