Patent ID: 9584354
Date: 2017-02-28
CPC Classifications: H04L,H04W

Claim:
1. A radio signal decoder comprising: a receiver configured to receive a digitized radio signal, the radio signal having modulated subcarrier frequencies encoding digital information, wherein the modulated subcarrier frequencies include a first set of subcarrier frequencies with a first subcarrier spacing and a second set of subcarrier frequencies with a second subcarrier spacing, the second subcarrier spacing different from the first subcarrier spacing; a first transformer configured with the first subcarrier spacing and configured to transform the digitized radio signal from a time domain into a frequency domain, the first transformer producing a first transformed signal having a value for each frequency in the first set of subcarrier frequencies; a first decoder configured to reconstruct digital information from output of the first transformer; an inverse transformer configured to: a second transformer configured with the second subcarrier spacing and configured to transform the output of the inverse transformer from the time domain to a frequency domain, the second transformer producing a second transformed signal having a value for each frequency in the second set; a second decoder reconstructing digital information from output of the second transformer.