patcat88
join:2002-04-05
Jamaica, NY
kudos:1 | reply to iansltx
Re: Also launched in Austin and San Antonio said by iansltx:With 100MHz of spectrum, Clear potentially has more capacity in a given area than 8-channel-bonded DOCSIS 3.0, though realistically due to lower than average signals etc. you'll see packages more comparable to DOCSIS 1.1 or maybe 2.0, at least with today's equipment. Which is perfectly fine; DOCSIS 1.1 and 2.0 are more than enough to compete on mobility and price versus DSL, non-D3 cable and even DOCSIS 3. How about some actual mbps? And does Clear use 100 mhz at each tower? and how much performance loss is there from frequencey reuse in wimax? |
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iansltx
join:2007-02-19
Golden, CO
kudos:2 Reviews:
 ·Comcast
| WiMAX is 4.5 bits per Hz at maximum modulation. Probably around 3.5 bits per Hz normally. So on a 5 MHz channel you've got 5 x 3.5 = 17.5 Mbps of capacity on the downstream. 10 MHz channels may also be deployed.
Each tower probably won't use all 100+ MHz that Clear has, but could use 60+ MHz if sectorized with no performance degradation due to spectrum reuse. Which, thanks to the propagation patterns of 2500MHz, is high. |
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| Is that spectrum (100MHz that they have to use) per tower, per town, or for the whole US?
So if they use 5MHz for a tower, can they not reuse that for other towers/towns? |
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iansltx
join:2007-02-19
Golden, CO
kudos:2 Reviews:
·Comcast
| Just like any other cellular provider (which they are, sorta) they can reuse their spectrum as long as they don't interfere too much with themselves...and they have a LOT of spectrum. I may be wrong on the actual numbers, but I think they have something like the whole 2500-2600MHz band or something similarly crazy. |
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