Efficient subband channelizer for randomly-spaced frequency groups
AssigneeMassachusetts Institute of Technology
InventorWilliam S. Song
Life of this patent
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Abstract
A subband channelizer for randomly spaced frequency groups includes: a first-stage channelizer configured to channelize a wideband input into a plurality of intermediate subbands, at least two of the plurality of intermediate subbands being partially overlapped; and a plurality of second-stage channelizers each configured to generate one or more final subbands from one of the plurality of intermediate subbands, wherein the intermediate subbands have wider bandwidth than the final subbands.
Claims20
A subband channelizer for randomly spaced frequency groups, the subband channelizer comprising:
- a first-stage channelizer configured to channelize a wideband input into a plurality of intermediate subbands, at least two of the plurality of intermediate subbands being partially overlapped;
- and
- a plurality of second-stage channelizers each configured to generate a plurality of final subbands from one of the plurality of intermediate subbands,
- wherein the intermediate subbands have wider bandwidth than the final subbands.
A subband channelizer for randomly spaced frequency groups, the subband channelizer comprising:
- a first-stage channelizer configured to channelize a wideband input into a plurality of intermediate subbands, at least two of the plurality of intermediate subbands being partially overlapped;
- and
- a plurality of second-stage channelizers each configured to generate a plurality of final subbands from one of the plurality of intermediate subbands and comprising:
- a second-stage digital down-converter (DDC) to frequency shift the intermediate subband, and
- a second-stage polyphaser channelizer configured to generate the plurality of final subbands based on the frequency-shifted intermediate subband.
A subband channelizer comprising:
- a first means for channelizing a plurality of frequency groups from a wideband signal, wherein frequency spacing between the frequency groups is random;
- and
- a plurality of second means each for channelizing a plurality of frequency subbands from a corresponding one of the plurality of frequency groups, wherein all frequency subbands within the corresponding one of the plurality of frequency groups have the same bandwidth and frequency spacing.
Dependencies are inferred from the claim text.