|Subject:||Re: [Discuss-gnuradio] Radio interoperability|
|Date:||Thu, 10 Oct 2013 14:53:37 +0200|
|User-agent:||Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.0|
I'm under the _expression_ that Wayne has already supplied you with the idea of the AM tx flowgraph; it's your project, clicking together the flowgraph after his description is up to you ;)
Well, if you need full-duplex, you will need two independent RX and two independent TX radio interfaces, so you need to have two USRP sources, two USRP sinks, and connect everything correctly.
Again: AM Rx will always be noisy as long as you don't do stunts on the analog/physical side of your receiver; I haven't had a look at your GRC files though, so is it possible you don't low pass your received signal? AM transmission seldom have a bandwidth significantly higher than 3kHz; this is partly because usually analog AM receivers have quite narrowband RF filters, to avoid picking up a lot of noise. Since this is totally anti-software defined radio, the LFRX doesn't have such filters.
Get a filter, get a preamp, get a higher gain antenna. Do what you must do to get a cleaner signal.
On 10/10/2013 02:18 PM, Bijendra Singh wrote:
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