[Discuss-gnuradio] introducing different modulation schemes for each sub carrier in ofdm

2009-09-15 Thread anma 

Hi,
I am trying to implement ofdm transmission using gnu radio and I want to
apply different modulation schemes for the different sub carriers. I believe
the existing code does not support this. Can somebody point out the exact
location in the source code which needs to be modified for the above
purpose? Also, is switching on and off of sub carriers possible with the
existing code?

Thanks in advance,
anma 
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Re: [Discuss-gnuradio] introducing different modulation schemes for each sub carrier in ofdm

2009-09-15 Thread Tom Rondeau 

anma wrote:

Hi,
I am trying to implement ofdm transmission using gnu radio and I want to
apply different modulation schemes for the different sub carriers. I believe
the existing code does not support this. Can somebody point out the exact
location in the source code which needs to be modified for the above
purpose? Also, is switching on and off of sub carriers possible with the
existing code?

Thanks in advance,
anma
  


Look in gr_ofdm_mapper_bcv and gr_ofdm_demapper_vcb.

Others have worked on this problem, too. Has anyone successfully 
implemented it, yet?


Tom



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