Multi-antenna communication systems utilizing RF-based and baseband signal weighting and combining
First Claim
1. A communication method for use by a wireless transceiver, comprising:
- demultiplexing, by a demultiplexer, an input signal into a first plurality of demultiplexed signals;
weighting and combining, by a first circuit configured to weight and combine in the baseband domain, said first plurality of demultiplexed signals prior to upconverting;
upconverting, by upconverters, said first plurality of demultiplexed signals into a first plurality of upconverted signals;
dividing, by dividers, said first plurality of upconverted signals into a second plurality of divided signals;
weighting, by a second circuit configured to weight, said second plurality of divided signals to form a second plurality of weighted signals, wherein weights used by the second circuitry to weight said second plurality of divided signals are obtained from an eigenvector corresponding to a largest eigenvalue of a cross-correlation matrix;
combining, by a combiner, ones of said second plurality of weighted signals to form a third plurality of combined signals; and
transmitting said third plurality of combined signals over a plurality of antennas.
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Accused Products
Abstract
A receiver operatively coupled to an antenna structure capable of receiving a first plurality of RF signals is disclosed herein. The receiver includes an RF processing network operative to perform weighting and combining operations within the RF domain using the first plurality of RF signals so as to produce a second plurality of RF signals. Also provided is a downconverter configured to downconvert the second plurality of RF signals into a second plurality of down-converted signals. In alternate implementations certain of the weighting and combining operations are performed at baseband and the remainder effected within the RF domain. A transmitter of corresponding architecture is also disclosed.
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Citations
23 Claims
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1. A communication method for use by a wireless transceiver, comprising:
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demultiplexing, by a demultiplexer, an input signal into a first plurality of demultiplexed signals; weighting and combining, by a first circuit configured to weight and combine in the baseband domain, said first plurality of demultiplexed signals prior to upconverting; upconverting, by upconverters, said first plurality of demultiplexed signals into a first plurality of upconverted signals; dividing, by dividers, said first plurality of upconverted signals into a second plurality of divided signals; weighting, by a second circuit configured to weight, said second plurality of divided signals to form a second plurality of weighted signals, wherein weights used by the second circuitry to weight said second plurality of divided signals are obtained from an eigenvector corresponding to a largest eigenvalue of a cross-correlation matrix; combining, by a combiner, ones of said second plurality of weighted signals to form a third plurality of combined signals; and transmitting said third plurality of combined signals over a plurality of antennas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless communication apparatus, comprising:
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a demultiplexer configured to demultiplex an input signal into a first plurality of demultiplexed signals; first circuitry configured to weight and combine, in the baseband domain, said first plurality of demultiplexed signals prior to provision to an upconverter; an upconverter configured to upconvert said first plurality of demultiplexed signals into a first plurality of upconverted signals; dividing elements configured to divide said first plurality of upconverted signals into a second plurality of divided signals; second circuitry configured to weight said second plurality of divided signals so as to form a second plurality of weighted signals, wherein weights used by the second circuitry to weight said second plurality of divided signals are obtained from an eigenvector corresponding to a largest eigenvalue of a cross-correlation matrix; and a combiner configured to combine ones of said second plurality of weighted signals in order to form a third plurality of combined signals that is transmitted through an antenna structure. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A wireless communication apparatus, comprising:
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a demultiplexer configured to demultiplex an input signal into a first plurality of demultiplexed signals; circuitry configured to weight and combine, in the baseband domain, said first plurality of demultiplexed signals prior to provision to the upconverter; an upconverter configured to upconvert said first plurality of demultiplexed signals into a first plurality of RF signals; and an RF processing network configured to perform weighting and combining operations in the RF domain upon said first plurality of RF signals to produce a second plurality of RF signals that is transmitted by an antenna structure, wherein RF processing network performs the weighting operations using weights that are obtained from an eigenvector corresponding to a largest eigenvalue of a cross-correlation matrix, wherein said RF processing network includes an arrangement of dividing elements configured to divide said first plurality of RF signals into a third plurality of divided RF signals, and wherein said RF processing network further includes; an arrangement of weighting elements configured to weight said third plurality of divided RF signals so as to form a third plurality of weighted RF signals; a combiner arrangement configured to combine ones of said third plurality of weighted RF signals to form said second plurality of RF signals. - View Dependent Claims (20, 21, 22, 23)
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Specification