# OFDM mod-demod

**URL:** <https://www.ruby-forum.com/t/ofdm-mod-demod/233702>\
**Category:** GNU Radio\
**Created:** [January 5, 2015, 1:18pm UTC](https://www.ruby-forum.com/t/ofdm-mod-demod/233702 "2015-01-05T13:18:20Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [January 5, 2015, 1:18pm UTC](https://www.ruby-forum.com/t/ofdm-mod-demod/233702/1 "2015-01-05T13:18:20Z")

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hi  
I was doing OFDM modulation demodulation in following way  
file source —\> OFDM Mod —\> Virtual Source  
Virtual Sink —\> OFDM demod —\> File sink  
File source out is given in byte format. This system give output for  
bpsk, qpsk and 8psk modulation. and no output for QAM schemes. What  
changes are to be made to do QAM modulations also.  
Regards  
Sreena