Radio signal decoding and decoder

摘要

A radio signal decoder comprises a receiver configured to receive a digitized radio signal having modulated subcarrier frequencies encoding digital information, a first set of the subcarrier frequencies having a first subcarrier spacing, a second set of the subcarrier frequencies having a second subcarrier spacing, a first transformer configured to transform the digitized radio signal from a time domain into a frequency domain, the transformer being configured with the first subcarrier spacing, a first decoder configured to reconstruct digital information from the output of the first transformer, and an inverse transformer configured to to transform the input from the frequency domain back to the time domain with the first subcarrier spacing, a second transformer configured to transform the output of inverse transformer from the time domain to a frequency domain with the second subcarrier spacing, and a second decoder reconstructing digital information from the output of the second transformer.

主权项

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:
receive as input at least a part of the output of the first transformer representing a frequency range overlapping the second set of subcarrier frequencies, andtransform the input from the frequency domain back to the time domain; 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.