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US 11,082,076 B2Granted
Method and device for transmitting or receiving at least one high-frequency signal using parallel and undersampled baseband signal processing
AssigneeRosenberger Hochfrequenztechnik GmbH & Co. KG
InventorsFranz G. Aletsee, Reinhard Stolle
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Abstract
A method and apparatus for processing or generating a high-frequency signal using parallel and undersampled baseband signal processing in the frequency domain.
Claims20
A method, comprising:
- processing an analog signal using a plurality of parallel signal processing paths to obtain a corresponding plurality of signal component representations, wherein
- for each of said plurality of parallel signal processing paths, said processing comprises:
- filtering said analog signal to obtain a filtered analog signal,
- sampling, at a respective sampling frequency belonging to a set of sampling frequencies, said filtered analog signal to obtain a digitized signal,
- applying a Fourier transform to said digitized signal to obtain a frequency-domain representation of said digitized signal, and
- deriving, from a portion of said frequency-domain representation having a frequency greater than 0 Hz and less than said respective sampling frequency, a respective signal component representation of said plurality of signal component representations,
- said analog signal comprises, at each of a first plurality of equidistant frequencies, a respective carrier signal of a first plurality of carrier signals,
- adjacent frequencies of said first plurality of equidistant frequencies are separated by a first frequency difference,
- said first plurality of equidistant frequencies is chosen, relative to said set of sampling frequencies, such that, for each of said plurality of parallel signal processing paths, the respective frequency-domain representation comprises, at a first frequency higher than 0 Hz by a second frequency difference, a first component correlated to at least one of said first plurality of carrier signals and comprises, at a second frequency lower than the respective sampling frequency by said second frequency difference, a second component correlated to said at least one of said first plurality of carrier signals, and
- a highest sampling frequency of said set of sampling frequencies is less than twice a highest frequency of said first plurality of equidistant frequencies.
7 more elements
A method, comprising:
- generating, using a plurality of parallel signal processing paths, a respective plurality of component signals, and
- summing said plurality of component signals to obtain a sum signal, wherein
- for each of said plurality of parallel signal processing paths, said generating comprises:
- selecting at least one symbol from a plurality of symbols in frequency-domain representation,
- applying an inverse Fourier transform to said selected, at least one symbol to obtain a sequence of values corresponding to a digital time-domain representation of said selected, at least one symbol at a first sampling frequency,
- subjecting said sequence of values to digital-to-analog conversion to obtain an analog signal,
- filtering said analog signal using a filter to obtain a respective one of said plurality of component signals,
- for each of said plurality of parallel signal processing paths, said digital-to-analog conversion is effected such that the respective analog signal comprises an analog representation of the respective sequence of values at a frequency higher than said first sampling frequency, and
- for each of said plurality of parallel signal processing paths, the respective filter exhibits a frequency response that differs from a frequency response of the filter of each respective other processing path of said plurality of parallel signal processing paths.
6 more elements
An apparatus comprising:
- a plurality of parallel signal processing paths adapted to respectively process an analog signal to obtain a corresponding plurality of signal component representations, wherein
- each of said plurality of parallel signal processing paths comprises:
- a filter that filters said analog signal to obtain a filtered analog signal,
- a sampler that samples, at a respective sampling frequency belonging to a set of sampling frequencies, said filtered analog signal to obtain a digitized signal,
- a transformer that applies a Fourier transform to said digitized signal to obtain a frequency-domain representation of said digitized signal, and
- a processor that derives, from a portion of said frequency-domain representation having a frequency greater than 0 Hz and less than said respective sampling frequency, a respective signal component representation of said plurality of signal component representations,
- said analog signal comprises, at each of a first plurality of equidistant frequencies, a respective carrier signal of a first plurality of carrier signals,
- adjacent frequencies of said first plurality of equidistant frequencies are separated by a first frequency difference,
- for each of said plurality of parallel signal processing paths, the respective frequency-domain representation comprises, at a first frequency, a first component correlated to at least one of said first plurality of carrier signals and comprises, at a second frequency, a second component correlated to said at least one of said first plurality of carrier signals,
- by virtue of a relationship of said first plurality of equidistant frequencies to said set of sampling frequencies, said first frequency is higher than 0 Hz by a second frequency difference and said second frequency is lower than the respective sampling frequency by said second frequency difference, and
- a highest sampling frequency of said set of sampling frequencies is less than twice a highest frequency of said first plurality of equidistant frequencies.
8 more elements
An apparatus comprising:
- a plurality of parallel signal processing paths that generate a respective plurality of component signals, and
- a processor that sums said plurality of component signals to obtain a sum signal, wherein
- each of said plurality of parallel signal processing paths comprises:
- a selector that selects at least one symbol from of a plurality of symbols in frequency-domain representation,
- a transformer that applies an inverse Fourier transform to said selected, at least one symbol to obtain a sequence of values corresponding to a digital time-domain representation of said selected, at least one symbol at a first sampling frequency,
- a digital-to-analog converter that subjects said sequence of values to digital-to-analog conversion to obtain an analog signal,
- a filter that filters said analog signal to obtain a respective one of said plurality of component signals,
- for each of said plurality of parallel signal processing paths, said digital-to-analog converter effects said digital-to-analog conversion such that the respective analog signal comprises an analog representation of the respective sequence of values at a frequency higher than said first sampling frequency, and
- for each of said plurality of parallel signal processing paths, the respective filter exhibits a frequency response that differs from a frequency response of the filter of each respective other processing path of said plurality of parallel signal processing paths.
6 more elements
Dependencies are inferred from the claim text.