Re: [Discuss-gnuradio] How To Change Tx Frequency During Transmission

[Marcus Müller]

Hello Van-Ly,

what hardware are you using?
If you're using any USRP, then the gr-uhd [1] blocks [2] will allow you to tune using stream tags, asynchronous messages and method calls.
From your problem description, it sounds like using stream tags is your best choice. If you want to know more about how to use these, I recommend going through the new guided tutorials [3], especially part 5 (which kind of relies on you having read the first four parts, but since I think you're already somewhat friends with GNU Radio, this might not be too much work).

Greetings,
Marcus


[1] http://gnuradio.org/doc/doxygen/page_uhd.html
[2] sink: http://gnuradio.org/doc/doxygen/classgr_1_1uhd_1_1usrp__sink.html
[3] http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorials

On 12/03/2014 04:21 PM, Nguyễn Văn Lý wrote:

Hello everyone,

Does anyone know how to change Tx frequency during transmission. I mean the
transmitter operates at f0 GHz in some interval of time and then change to
operate at f1 GHz.

Sincerely,
Van-Ly

Van-Ly Nguyen,
Research Assistant,
Signals and Systems Laboratory - SSL
Faculty of Electronics and Telecommunications - FET
University of Engineering and Technology - UET
Vietnam National University, Hanoi - VNU

Tel: (+84) 97 881 9406

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