Orthologonal beamforming for multiple user multiple-input and multiple-output (MU-MIMO)
First Claim
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1. A method for providing beam selection using orthogonal beamforming vectors at a node, comprising:
- generating a set of orthogonal beamforming vectors;
generating a set of orthogonal reference signals (RSs);
mapping the set of orthogonal RSs to beams using the set of orthogonal beamforming vectors;
receiving a quantized maximum signal-to-interference-plus-noise ratio (S1NR) from each of a plurality of user equipments (UEs) and a reference signal (RS) index for each quantized maximum SINR, wherein the RS index represents a beam for each UE with a best SINR for the set of orthogonal RSs, the quantized maximum SINR is received in a channel quality indicator (CQI) for each UE, and the RS index is determined by a precoding matrix indicator (PMI) received from each UE;
scheduling downlink resources for each beam using a UE with a highest quantized maximum SINR relative to other UEs; and
transmitting data using a beam to the UE with the highest quantized maximum SINR for the beam relative to the other UEs;
wherein;
the SINR is represented by
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Abstract
Technology to generate an improved signal-to-interference-plus-noise ratio (SINR) from a set of orthogonal reference signals (RSs) is disclosed. In an example, a user equipment (UE) can include computer circuitry configured to: Receive a set of orthogonal RSs from a node; calculate a SINR for each of the RSs in the set of orthogonal RSs to form a set of SINR; select a maximum SINR from the set of SINR; and quantize the maximum SINR for the set of SINR. Each reference signal can represent a transmission beam direction.
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Citations
24 Claims
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1. A method for providing beam selection using orthogonal beamforming vectors at a node, comprising:
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generating a set of orthogonal beamforming vectors;
generating a set of orthogonal reference signals (RSs);mapping the set of orthogonal RSs to beams using the set of orthogonal beamforming vectors; receiving a quantized maximum signal-to-interference-plus-noise ratio (S1NR) from each of a plurality of user equipments (UEs) and a reference signal (RS) index for each quantized maximum SINR, wherein the RS index represents a beam for each UE with a best SINR for the set of orthogonal RSs, the quantized maximum SINR is received in a channel quality indicator (CQI) for each UE, and the RS index is determined by a precoding matrix indicator (PMI) received from each UE; scheduling downlink resources for each beam using a UE with a highest quantized maximum SINR relative to other UEs; and transmitting data using a beam to the UE with the highest quantized maximum SINR for the beam relative to the other UEs;
wherein;the SINR is represented by - View Dependent Claims (2, 3, 4, 5)
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6. A user equipment (UE) operable to generate an improved signal-to-interference-plus-noise ratio (SINR) from a set of orthogonal reference signals (RSs), having computer circuitry configured to:
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receive a set of orthogonal RSs from a node, wherein each reference signal represents a transmission beam direction; calculate a SINR for each of the RSs in the set of orthogonal RSs to form a set of SINR; select a maximum SINR from the set of SINR; and quantize the maximum SINR for the set of SINR, wherein the SINR is represented by - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A node configured for random beamforming (RBF), comprising:
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a transceiver to; receive, from each of a plurality of user equipments (UEs), a quantized maximum signal-to-interference-plus-noise ratio (SINR) and a pilot index for each quantized maximum SINR, wherein the pilot index represents a beam for each UE with a best SINR for a set of orthogonal pilots, the quantized maximum SINR is transmitted in a channel quality indicator (CQI), and the pilot index is determined by a transmitted precoding matrix indicator (PMI); and a processor to; schedule a downlink transmission for each beam using UEs with a highest quantized maximum SINR relative to other UEs; and wherein the transceiver is further configured to; transmit data via a set of transmit antennas using a beam to the UEs with the highest quantized maximum SINR for the beam relative to other UEs, the SINR is represented by - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification