Hi Philip,California radio amateurs have a spectrum shortage after the loss of much of our 440 repeater capability to PAVE PAWS. Most public-service agencies that use two-way radio anywhere, like police and fire departments could use more spectrum, too. And cellular telephony operators are complaining that they don't have enough.
So, how narrow can we go with VHF/UHF channels using Codec2 and either GMRS or C4FM (so that we can use nonlinear amplifiers and conserve our power budget in handhelds), and how much channel capacity can we gain? How much FEC do we really need, and how do we optimize the FEC to S/N trade-off? Can we provide 2.5 KHz channels to services that are currently using much wider channels?
That's a thesis with a real public benefit, if you can pull it off.
Thanks
Bruce
/
/On 05/29/2012 12:27 AM, Philip Crump wrote:
Hi All, I am a second-year Electronic Engineering student with an Individual Project being ~30% of my next (third) year.
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