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Thread ID: 64429	2005-12-14 22:13:00	Cell phone sensitivity	Billy T (70)	PC World Chat

Post ID	Timestamp	Content	User
412778	2005-12-14 22:13:00	Does anybody out there in PF1 land have access to information about the specific RF sensitivity for typical cellphone handsets, analogue and/or digital? I am curious to know how sensitive they are compared to radiotelephones, which in my days of comms work back in the early 70's were able to produce clean audio at 1 microvolt (min 12db s/n ratio), and maintain adequate communication quality down to 0.25 microvolts. I suspect that cellphones are not quite that sensitive, but with the advances in electronics it could be possible. Cheers Billy 8-{)	Billy T (70)
412779	2005-12-15 01:35:00	I suspect they are a lot better . As a guide, look at the sensitivity of GPS receivers . They are fighting the space loss . . . at least 100dB or 120dB or so . . . so they might make a "good" receiver which comes "out of the noise at less than a microvolt" look pretty primitive . A quick look at some of DSE's WiFi adapters indicate reception sensitivity about -72 dBm to -82 dBm . . . with 11g having the better sensitivity . That's about 2 . 5 GHz . A PCI adapter's antenna is "2dBi" . . . that is, a good piece of wet string .	Graham L (2)
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