Quarter wavelength unit delay and complex weighting coefficient continuous-time filters
AssigneeNokia Solutions and Networks Oy
InventorsAntti HEISKANEN, Eero KOUKKARI
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Abstract
Various signal processing techniques may benefit from appropriate handling. For example, certain signal processors may benefit from quarter wavelength unit delay and complex weight coefficient continuous-time filters. A method can include splitting an input signal into a plurality of signal paths. The method can also include complex weighting, for each signal path, a respective signal. The method can further include summing outputs of the signal paths. The method can additionally include providing an output comprising the sum of the signal paths. The complex weighting can be configured to independently control gain, phase and delay of the output signal over broadband.
Claims21
A method, comprising:
- splitting an input signal into a plurality of signal paths;
- complex weighting, for each signal path, a respective signal;
- summing outputs of the signal paths, and
- providing an output comprising the sum of the signal paths,
- wherein the complex weighting is configured to independently control gain, phase and delay of the output signal over broadband.
An apparatus, comprising:
- a splitter configured to split an input signal into a plurality of signal paths at a first end of the signal paths, wherein each signal path comprises at least one attenuator and at least one delay element;
- and
- a summer configured to sum the signal paths at a second end of the signal paths opposite the first end of the signal paths,
- wherein the apparatus is configured to independently control gain, phase and delay of the output signal over broadband.
An apparatus, comprising:
- means for splitting an input signal into a plurality of signal paths;
- means for complex weighting, for each signal path, a respective signal;
- means for summing outputs of the signal paths, and
- means for providing an output comprising the sum of the signal paths,
- wherein the complex weighting is configured to independently control gain, phase and delay of the output signal over broadband.
Dependencies are inferred from the claim text.