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The official git repository for Contiki, the open source OS for the Internet of Things

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Contiki modulation

soeun727 opened this issue · comments

commented

hi i want to check cooja modulation.
My experiment environment is cc2420, then is that right that the cooja using O-QPSK modulation?

And also how can I get the graph Eb/No graph(the energy per bit to noise power spectral density ratio)?
I want to check modulation and if it possible I want to change it.

Please give me answer. Thanks.

commented

Cooja does not simulate the physical layer.

The closest you can get to the physical layer is to use the Msp802154BitErrorRadio radio interface on Sky or Z1 nodes. It does simulate realistic bit error distribution in the received packets, assuming interference-free channel. But this is still part of the purely digital logic in the receiver, nothing from the analog domain is simulated in Cooja.

commented

Thanks for giving comment.
Could you told me how I can change Msp802154BitErrorRadio radio interface to my simulation?
Do I have to change Makefile?
I search about it, but there is not much information about it..

commented

If you open a Cooja simulation file (.csc) that is using msp430 motes, there will be one or more <motetype> definitions. By default this definition includes this line, defining the radio interface:

   <moteinterface>org.contikios.cooja.mspmote.interfaces.Msp802154Radio</moteinterface>

Change that to:

   <moteinterface>org.contikios.cooja.mspmote.interfaces.Msp802154BitErrorRadio</moteinterface>

You can also change the interfaces from the Cooja GUI.