Data transmission method and arrangement

A method for determining weight factors of antenna beams, the method comprising:

• using at least one directional antenna beam implemented with an antenna array to establish a radio link,
• dividing the antenna beam into at least two user-specific beams,
• selecting weight factors of antenna elements of the antenna array such that the antenna element specific sums of weight factors of antenna elements of a user-specific beam and corresponding weight factors of other user-specific beams formed with the same antenna array are at least substantially equal within predetermined limits in order to achieve a predetermined power balance between different antenna elements.

A transmitter for determining weight factors of antenna beams, in which arrangement at least one directional antenna beam implemented with an antenna array is used to establish a radio link and a radio cell is formed with the antenna beam, comprising:

• means for dividing the radio cell into at least two cells by dividing the antenna beam,
• means for selecting weight factors of antenna elements of the antenna array such that the antenna element specific sums of weight factors of a radio cell formed with the antenna array and corresponding weight factors of at least one, second radio cell formed with the same antenna array are at least substantially equal within predetermined limits in order to achieve a predetermined power balance between different antenna elements.

A transmitter for determining weight factors of antenna beams, in which arrangement at least one directional antenna beam implemented with an antenna array is used to establish a radio link, comprising:

• means for dividing the antenna beam into at least two user-specific beams,
• means for selecting weight factors of antenna elements of the antenna array such that the antenna element specific sums of weight factors of antenna elements of a user-specific beam and corresponding weight factors of other user-specific beams formed with the same antenna array are at least substantially equal within predetermined limits in order to achieve a predetermined power balance between different antenna elements.

A transmitter for determining weight factors of antenna beams, in which arrangement at least one directional antenna beam implemented with an antenna array is used to establish a radio link and a radio cell is formed with the antenna beam, comprising:

• means for dividing the radio cell into at least two different cells by dividing the antenna beam,
• means for dividing the antenna beam forming a radio cell into at least two user-specific beams,
• means for selecting weight factors of antenna elements of the antenna array such that the antenna element specific sums of corresponding weight factors of beams formed with the same antenna array are at least substantially equal within predetermined limits in order to achieve a predetermined power balance between different antenna elements.

A transmitter for determining weight factors of antenna beams, in which arrangement at least one directional antenna beam implemented with an antenna array is used to establish a radio link and a radio cell is formed with the antenna beam, comprising:

• dividing means dividing the radio cell into at least two cells by dividing the antenna beam,
• selecting means selecting weight factors of antenna elements of the antenna array such that the antenna element specific sums of weight factors of a radio cell formed with the antenna array and corresponding weight factors of at least one, second radio cell formed with the same antenna array are at least substantially equal within predetermined limits in order to achieve a predetermined power balance between different antenna elements.

A transmitter for determining weight factors of antenna beams, in which arrangement at least one directional antenna beam implemented with an antenna array is used to establish a radio link, comprising:

• dividing means dividing the antenna beam into at least two user-specific beams,
• selecting means selecting weight factors of antenna elements of the antenna array such that the antenna element specific sums of weight factors of antenna elements of a user-specific beam and corresponding weight factors of other user-specific beams formed with the same antenna array are at least substantially equal within predetermined limits in order to achieve a predetermined power balance between different antenna elements.

A transmitter for determining weight factors of antenna beams, in which arrangement at least one directional antenna beam implemented with an antenna array is used to establish a radio link and a radio cell is formed with the antenna beam, comprising:

• first dividing means dividing the radio cell into at least two different cells by dividing the antenna beam,
• second dividing means dividing the antenna beam forming a radio cell into at least two user-specific beams,
• selecting means selecting weight factors of antenna elements of the antenna array such that the antenna element specific sums of corresponding weight factors of beams formed with the same antenna array are at least substantially equal within predetermined limits in order to achieve a predetermined power balance between different antenna elements.