|From:||Marcus D. Leech|
|Subject:||Re: [Discuss-gnuradio] USRP1 and WBX, communication distance|
|Date:||Tue, 19 Apr 2011 18:03:02 -0400|
|User-agent:||Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:188.8.131.52) Gecko/20110307 Fedora/3.1.9-0.39.b3pre.fc14 Thunderbird/3.1.9|
On 04/19/2011 05:44 PM, Gunther Ferdinand wrote:
Answering that question requires a lot of "it depends".
Maximum transmission distance is proportional to a number of parameters:
o transmit power (or more precisely effective radiated power towards the receiver)
o receiver sensitivity--which depends both on noise figure of the receiver, and directivity of the receive antenna
o any impairments to the signal due to physical obstructions, causing absorption and multi-path reflections
o bandwidth of the signal
o modulation scheme
o processing gain due to coding techniques, etc
So, you see, a complete model is quite complicated, so answering the question without "fleshing out the model" is not really possible.
Can you communicate beyond the edge of your desk? Yes, almost certainly. Beyond the edge of your living room? Probably? Beyond the
edge of your city block? Not sure.
-- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org
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