portyllo

5 ms·

1.
by portyllo 4y ago
MHz-POP makes the most sense in cell networks, where an operator (AT&T, T-Mobile,...) wants to acquire a spectrum license in a particular region of the country. Evaluating the MHz-POP makes sense as the price they are willing to pay var
2.
by portyllo 4y ago
A MHz-POP is just bandwidth times population covered by the Geographic Service Area (i.e., where the company is licensed to operate). For example, in the US, they would have 11.5 MHz x 330 M = 3.79 Billion MHz-POP.
3.
by portyllo 4y ago
This made it to the cover of Nature with a similar headline [0]. I guess that they are also "overhyping everything". [0] https://pbs.twimg.com/media/DsmahXYXoAAkaoI?format=jpg&name=...
4.
by portyllo 6y ago
No, it will not be possible, no matter what Elon says. Starlink operates in portions of the Ku and Ka bands that are reserved for Earth-to-space comms, not for space-to-space comms.
5.
by portyllo 6y ago
There is plenty of bandwidth to achieve more than 1 Gbps of throughput from a 3-U cubesat (see Planet with their latest X-band comms-system [1], which results in more than 50 GB per pass). If you really need more than that, new free space o
6.
by portyllo 7y ago
http://systemarchitect.mit.edu/docs/delportillo19a.pdf I am one of the authors. This was donde in Sept 2018 so its a little bit outdated by now.
7.
by portyllo 7y ago
Well, look at Oneweb as an example. They have raised 3+ billions, still need more funding and their total system throughout is not that much larger than Viasat-3's,which has a cost of ~1 billion (?). I don't think that Starlink is
8.
by portyllo 7y ago
Developing compatible systems would be very expensive. There are very few standards in Space Comms., specially for satellite-to-satellite Comms.
9.
by portyllo 7y ago
SpaceX satellites cannot handle 1 Tbps each, they can handle 23 Gbps each according to their FCC filling.
10.
by portyllo 7y ago
Specially now that the satellites have no crosslinks.
11.
by portyllo 7y ago
It's not true. LEO systems are far more CAPEX intensive than GEO, and neither Starlink, Oneweb, Telesat, or Kuiper will be cheaper than Viasat-3 and will not be able to compete in terms of cost per Gbps.