"David Looser" wrote in message

"BBC is biased towards DAB" wrote in message
...

Internet bandwidth costs fall in-line with Moore's Law, because
Moore's
Law increases the speed of Internet routers without increasing the
costs
of the routers.



Frankly Steve, if you can write something as naive as that, your
opinion
isn't worth bothering with.

Suffice it to say that internet costs are more to do with
transmission
systems than routers, and that is particularly true of mobile
internet.


I meant Internet bandwidth costs for content producers. Have a read of
this section if you don't believe me:

http://tinyurl.com/5bzosx

I'm not in any way suggesting that the cost of mobile broadband is
linked to Moore's Law.

Spectral efficiency on mobile systems can be increased though, because
the new 4G systems such as LTE and WiMAX are using MIMO, and the 5G
system when it's chosen will use MIMO in a big way - MIMO allows the
channel capacity to be multiplied by the number of antennas used at
either end of the link. There's a 5G prototype system that uses 12x12
MIMO, and that literally has a capacity that's 12x what it would be
using single antennas, and it's been demonstrated transmitting at 5
Gbps to a moving receiver - in a 100 MHz channel. We obviuosly won't
see those speeds ourselves, but it shows what the technology is
capable of and the incredibly high spectral efficiency is allows.



--
Steve - www.digitalradiotech.co.uk - Digital Radio News & Info

The adoption of DAB was the most incompetent technical
decision ever made in the history of UK broadcasting:
http://www.digitalradiotech.co.uk/da...ion_of_dab.htm