SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Pastimes : The New Qualcomm - write what you like thread. -- Ignore unavailable to you. Want to Upgrade?


To: Maurice Winn who wrote (5607)1/3/2003 3:35:01 PM
From: pheilman_  Read Replies (1) | Respond to of 12231
 
The cellphone in the airplane may not be able to reduce its transmit power enough to avoid being heard in several cells. The ratio of the distances is very different from on the ground. The inverse square attenuation in signals doesn't help as much when there is line of sight to several base stations and just a small percentage difference in the distance.

In addition the doppler shift is challenging. I was amazed the Motorola phone with service by Verizon (CDMA) was able to get in the net while we were descending over San Jose, about 25 miles out, several thousand feet in altitude and 200 MPH (?). Wish I had a GPS unit running at the time ;-) . We were in a dreadful 767 and thus didn't get to see the track and movement information on the displays.

It strikes me that your solution to cavities might also be Wacky Wireless.