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US 10,707,947 B2Granted
Reconfigurable hybrid beamforming MIMO receiver with inter-band carrier aggregation and RF-domain LMS weight adaptation
AssigneeCarnegie Mellon University
InventorsJeyanandh Paramesh, Susnata Mondal
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Abstract
A reconfigurable, multi-band hybrid beamforming architecture is introduced. The present invention is related to a Cartesian-Combining architecture to efficiently implement RF beamforming for a single downconversion chain employing direct downconversion in which the Cartesian-Combining architecture is extended to hybrid beamforming and to heterodyne downconversion.
Claims17
A fully-connected hybrid beamforming receiver comprising:
- a. circuitry implementing one or more low noise amplifiers, each coupled to an antenna, each low-noise amplifier outputting one or more streams;
- b. circuitry, for applying complex weighting to each of the one or more streams;
- c. circuitry implementing a multi-stage combiner, for combining one stream from each of the one or more low noise amplifiers to produce a combined stream;
- and
- d. circuitry implementing one or more two-stage mixers, per the combined stream, and one mixer per stage, a first stage for performing a heterodyne downconverting of the combined stream to an intermediate frequency using a signal generated by a first local oscillator and a second stage for performing a heterodyne downconverting of each combined stream at the intermediate frequency to a baseband frequency using a signal generated by a second local oscillator.
2 more elements
Dependencies are inferred from the claim text.