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US 8,942,312 B1Granted
WCDMA modulation
AssigneeMarvell International Ltd.
InventorsBrian Brunn, Marc Leroux, Gregory Uehara
Life of this patent
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Abstract
This disclosure describes techniques for modulating data. In one embodiment, these techniques include receiving an I or Q value, generating a time-shifted sample of a shaped pulse based on the I or Q value, and providing the time-shifted sample to a digital-to-analog converter.
Claims20
A system comprising:
- a digital-to-analog converter;
- a pulse-shape look-up table;
- an indexed pulse-shape-generator configured to:
- receive an I or Q value that has been amplified and corrected for phase distortion;
- increment or decrement an index of the indexed pulse-shape-generator to implement timing advancement or timing retardation via the indexed pulse-shape-generator;
- retrieve, based on the incremented or decremented index, a pulse-shape coefficient from a pulse-shape lookup-table;
- create a time-shifted sample of a shaped pulse based on the I or Q value and the pulse-shape coefficient;
- and
- provide the time-shifted sample to the digital-to-analog converter.
6 more elements
A method comprising:
- receiving an I or Q value;
- generating, via a pulse-shape lookup-table, a time-shifted sample of a shaped pulse based on the I or Q value, the time-shifted sample generated at least in part by modifying an index value of the pulse-shape lookup-table to advance or retard a timing of the time-shifted sample;
- and
- providing the time-shifted sample to a digital-to-analog converter.
1 more element
A System-on-Chip comprising:
- a digital-to-analog converter configured to generate analog signals useful to transmit data;
- a modulator configured to:
- receive an I or Q value;
- modify an index value of an indexed pulse-shape lookup-table to advance or retard a timing shaped pulse generated using pulse-shape coefficients of the indexed pulse-shape lookup-table;
- generate, via the indexed pulse-shape lookup-table, a time-shifted sample of a shaped pulse based on the I or Q value;
- and
- provide the time-shifted sample to the digital-to-analog converter.
4 more elements
Dependencies are inferred from the claim text.