System and method for discrete gain control in hybrid MIMO RF beamforming for multi layer MIMO base station
First Claim
1. A system comprising:
- a multiple-input-multiple-output (MIMO) receiving system;
a plurality of beamforming tunable receiving antennas configured to receive a plurality of transmitted layers;
a MIMO baseband module; and
a control module configured to select for the beamforming antennas a single set of discrete weights for tuning said antennas for all of the transmitted layers,wherein said selection is carried out based on a predefined quality metric, being an extended Maximal Ratio Combining (MRC) metric, measured by the MIMO baseband module for each antenna, and using average of various signals measured separately for each antenna to determine gain or attenuation independently of phase selection.
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Abstract
A multiple-input-multiple-output (MIMO) receiving system configured for receiving multiple transmission layers is provided herein. The system includes a plurality of beamformed tunable receiving antennas configured to receive a plurality of transmitted layers; and a control module configured to select for the beamformed antennas a single set of discrete weights for tuning said antennas for all of the transmitted layers so that the weights are selected for optimal performance of said receiving system, wherein said selection is carried out based on an extended Maximal Ratio Combining (MRC) metric or other quality metric measured by the MIMO baseband module, and using said measured metric separately for each beamformed antenna to determine gain or attenuation independently of phase selection.
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Citations
25 Claims
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1. A system comprising:
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a multiple-input-multiple-output (MIMO) receiving system; a plurality of beamforming tunable receiving antennas configured to receive a plurality of transmitted layers; a MIMO baseband module; and a control module configured to select for the beamforming antennas a single set of discrete weights for tuning said antennas for all of the transmitted layers, wherein said selection is carried out based on a predefined quality metric, being an extended Maximal Ratio Combining (MRC) metric, measured by the MIMO baseband module for each antenna, and using average of various signals measured separately for each antenna to determine gain or attenuation independently of phase selection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method comprising:
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receiving a plurality of transmitted layers via a plurality of beamforming tunable receiving antennas configured to receive a plurality of transmitted layers; selecting for the beamforming antennas a single set of weights for tuning said antennas for all of the transmitted layers, wherein said selection is carried out based on an extended Maximal Ratio Combining (MRC) metric measured separately for each antenna using average of various signals received by each antenna and using said extended MRC metric to determine gain or attenuation of the antennas independently of phase selection; and transferring the beamformed signals to a multiple-input-multiple-output (MIMO) receiving system. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification