HFU HF Underground
Technical Topics => SDR - Software Defined Radio => Topic started by: redhat on September 11, 2015, 2127 UTC
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After reviewing some off-air recordings, as well as some verified info off the web, one of the shortcomings of SoDiRA is becoming more apparent. The problem manifests itself in hardware decoders as well, its called 'platform motion'. Its caused by selective fading altering the phase and amplitude relationships of the composite c-quam waveform. A clever work-around is to decode the c-quam waveform as QUAM instead, which does away with the cosine correction, and thus greatly reduce platform motion.
So, who knows how to write code for this, because I sure don't. I'm a hardware guy after all :)
It might also be neat to add ISB decode as well, seeing as there is currently no way in software to do this.
Thanks All,
+-RH