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I wish I could understand how engineers are able to transmit so much wireless data at those distances, with so many devices at the same time. I guess antenna t
by jokoon 11y ago
I wish I could understand how engineers are able to transmit so much wireless data at those distances, with so many devices at the same time.
I guess antenna technologies have improved a lot for the last 10 years, and I still wonder where the subscription cost goes: are there patents for those new types of antennas, are those antennas expensive to build, or does the cost just reflect the amount of antennas installed and the infrastructure built to achieve that wireless bandwidth?
Other question is, if you have solar drones, how much upload (from the device to the drone) can you achieve, since batteries are still very much limited?
- valarauca1 11y agoGoogle's Loon Project involves having the balloons float over the weather. So cloud cover isn't the issue. Batteries only have to function at night. Furthermore each drone will in software limit itself to N active connections (just like cell towers do), so you just use that N to calculate max battery draw, then size batteries appropriately.
- jokoon 11y agoI was talking about the battery of smartphones. In general smartphones are good at receiving data, but not so good at sending it because their batteries are very limited.
- madengr 11y agoIt depends on a lot of things; OFDM modulation multi path and fading mitigation, MIMO space-time coding for channel capacity increases, adaptive beam forming, error correction, efficient power amplification, base-band processing. For Google's line of sight application, the adaptive beam forming and power amplification are the main tech drivers.