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US 12,009,787 B2Granted
Signal down-conversion
AssigneeSonitor Technologies AS
InventorsWilfred Edwin Booij, Elad Shabtai
Life of this patent
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AssigneeSonitor Technologies AS
InventorsWilfred Edwin Booij, Elad Shabtai
Estimating the term…
An apparatus (7) for down-converting a sampled signal comprises a processing system (206) configured to apply a mixing-and-combining operation repeatedly to successive sub-sequences of N input samples, X, representative of a signal and having an initial sampling rate, M, to generate a sequence of output samples, Y, having an output rate, T, lower than the initial sampling rate M. The sub-sequences of the N input samples, X, are spaced at intervals that correspond to the output rate M. The mixing-and-combining operation generates a respective output sample Y from each sub-sequence, where Y depends on a set of products of the input samples X of the sub-sequence with respective values derived from a periodic mixing signal having a mixing frequency.
A method of down-converting a sampled signal, the method comprising:
An apparatus for down-converting a sampled signal, the apparatus comprising a processing system configured to apply a mixing-and-combining operation to each of a succession of sub-sequences of input samples, the input samples being representative of a signal and having an initial sampling rate, to generate a sequence of output samples having an output rate lower than the initial sampling rate, wherein the sub-sequences of the input samples are spaced at intervals that correspond to the output rate, and wherein the mixing-and-combining operation generates a respective output sample from each sub-sequence wherein the output sample depends on a set of products of the input samples of the sub-sequence with respective values derived from a periodic mixing signal having a mixing frequency.
A non-transitory computer-readable storage medium storing computer software which, when executed on one or more processors, causes the one or more processors to apply a mixing-and-combining operation to each of a succession of sub-sequences of input samples, the input samples being representative of a signal and having an initial sampling rate, to generate a sequence of output samples having an output rate lower than the initial sampling rate, wherein the sub-sequences of the input samples are spaced at intervals that correspond to the output rate, and wherein the mixing-and-combining operation generates a respective output sample from each sub-sequence wherein the output sample depends on a set of products of the input samples of the sub-sequence with respective values derived from a periodic mixing signal having a mixing frequency.
Dependencies are inferred from the claim text.