Smart antenna beamforming device in communication system and method thereof
First Claim
1. A method for forming a beam based on a plurality of signals received through a plurality of antennas in a base station of a communication system, the method comprising:
- processing the plurality of signals to obtain a data subcarrier matrix allocated to at least one desired signal requested by the base station;
estimating Direction-Of-Arrivals (DOAs) of the plurality of received signals based on the data subcarrier matrix;
identifying the at least one desired signal and at least one interference signal from the plurality of signals based on the estimated DOA;
generating an interference-plus-noise covariance matrix by using at least one DOA of the at least one interference signal among the DOAs;
generating a plurality of beamforming vectors based on the covariance matrix; and
using the plurality of beamforming vectors to form a plurality of final beams.
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Abstract
A beamforming device includes a Direction Of Arrival (DOA) estimation unit for estimating DOAs of the received signals based on a data subcarrier matrix; a pre-spatial filtering unit for using the estimated DOA, performing a filtering operation for the data subcarrier matrix, and generating filtering matrixes; a signal identification unit for using a data sequence, identifying original and interference signals, and generating the DOAs of the original and interference signals; a spatial filtering unit for generating an interference-plus-noise covariance matrix by using the DOA of the interference signal, eliminating the interference signal by using the covariance matrix and the DOA of the original signal, and forming final beams for the original signal; and a channel estimating and signal combining unit for performing a maximal ratio combining operation so that the final beams are combined as one combined final beam.
73 Citations
16 Claims
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1. A method for forming a beam based on a plurality of signals received through a plurality of antennas in a base station of a communication system, the method comprising:
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processing the plurality of signals to obtain a data subcarrier matrix allocated to at least one desired signal requested by the base station;
estimating Direction-Of-Arrivals (DOAs) of the plurality of received signals based on the data subcarrier matrix;
identifying the at least one desired signal and at least one interference signal from the plurality of signals based on the estimated DOA;
generating an interference-plus-noise covariance matrix by using at least one DOA of the at least one interference signal among the DOAs;
generating a plurality of beamforming vectors based on the covariance matrix; and
using the plurality of beamforming vectors to form a plurality of final beams. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A device for forming a beam based on a plurality of signals received through a plurality of antennas in a base station of a communication system, the device comprising:
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a Direction-Of-Arrival (DOA) estimation unit for estimating DOAs of the plurality of signals based on a data subcarrier matrix obtained from the plurality of signals;
a pre-spatial filtering unit for performing a filtering operation for the data subcarrier matrix to generate a filtering matrix by using the estimated DOAs;
a signal identification unit for identifying at least one desired signal and at least one interference signal from the plurality of received signals by using a data sequence generated by the filtering matrix, and generating the DOA of the at least one desired signal and the DOA of the at least one interference signal from the estimated DOAs;
a spatial filtering unit for generating an interference-plus-noise covariance matrix by using the at least one DOA of the at least one interference signal, eliminating the at least one interference signal by using the covariance matrix and the at least one DOA of at least one the desired signal, and forming a plurality of final beams for the at least one desired signal; and
a channel estimating and signal combining unit for performing a maximal ratio combining on outputs according to the plurality of final to generate a combined signal. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A device for forming a beam based on a plurality of signals received through a plurality of antennas in a base station of a communication system, the device comprising:
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means for estimating Direction-Of-Arrivals (DOAs) of the plurality of signals;
means for identifying at least one original signal and at least one interference signal among the plurality of signals;
means for identifying at least one first DOA of the at least one original signal and at least one second DOA of the at least one original signal among the DOAs; and
means for forming at least one main beam in a direction of the at least desired signal by using the at least one first DOA and the at least one second DOA. - View Dependent Claims (15, 16)
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Specification