Radio communication device and method of determining weighting matrix
AssigneeSumitomo Electric Industries, Ltd.
InventorsEiji MOCHIDA, Hitoshi HIRATA
Life of this patent
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Abstract
A radio communication device includes: a baseband portion that generates a plurality of transmit signals destined for a same area; an antenna including a plurality of antenna elements; and a signal processing portion that splits each of the plurality of transmit signals generated by the baseband portion into signals for the respective plurality of antenna elements, multiplies each of the plurality of split transmit signals by a corresponding element of a weighting matrix, and then combines those of the transmit signals provided for each corresponding antenna element.
Claims10
A radio communication device comprising:
- a baseband portion that generates a plurality of transmit signals destined for a same area;
- an antenna including a plurality of antenna elements;
- and
- a signal processing portion that splits each of the plurality of transmit signals generated by the baseband portion into signals for the respective plurality of antenna elements, multiplies each of the plurality of split transmit signals by a corresponding element of a weighting matrix, and then combines those of the transmit signals provided for each corresponding antenna element.
A method of determining a weighting matrix to be multiplied to a plurality of transmit signals generated by a baseband portion and destined for a same area, the method comprising:
- a selecting step of selecting, as candidates for weight row vectors or weight column vectors of the weighting matrix, a larger number of weight candidates than a number of the weight row vectors or the weight column vectors, based on tilt angles of beams to the area, the weight row vectors and the weight column vectors being provided for the respective plurality of transmit signals generated by the baseband portion;
- and
- a determining step of determining, as the weight row vectors or the weight column vectors, weight candidates that satisfy desired communication quality from among the weight candidates selected in the selecting step.
Dependencies are inferred from the claim text.