Beam Forming Using a Two-Dimensional Antenna Arrangement
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsFredrik ATHLEY, Sven PETERSSON
Life of this patent
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Abstract
There is provided two-dimensional beam forming using a two dimensional antenna array. The beam forming comprises alternatingly transmitting a first set of reference signals for channel state information using a two-dimensional antenna array as a first essentially linear array and as a second essentially linear array substantially perpendicular to the first linear array, respectively. When used as the first linear array one reference signal of the first set per virtual antenna port in said first linear array is transmitted. When used as the second linear array one reference signal of the first set per virtual antenna port in the second linear array is transmitted.
Claims20
A method for two-dimensional beam forming using a two dimensional antenna array, comprising the step of:
- alternatingly transmitting a first set of reference signals for acquiring channel state information using a two-dimensional antenna array as a first essentially linear array and as a second essentially linear array substantially perpendicular to the first linear array, respectively;
- wherein
- when used as said first linear array one reference signal of said first set per virtual antenna port in said first linear array is transmitted;
- and
- when used as said second linear array one reference signal of said first set per virtual antenna port in said second linear array is transmitted.
A two dimensional antenna arrangement for two-dimensional beam forming, comprising a processing unit configured to cause a two-dimensional antenna array to:
- alternatingly transmit a first set of reference signals for acquiring channel state information using the two-dimensional antenna array as a first essentially linear array and as a second essentially linear array substantially perpendicular to the first linear array, respectively;
- wherein the processing unit is configured such that it causes the two-dimensional antenna array to, when used as said first linear array, transmit one reference signal of said first set per virtual antenna port in said first linear array;
- and
- wherein the processing unit is configured such that it causes the two-dimensional antenna array to, when used as said second linear array, transmit one reference signal of said first set per virtual antenna port in said second linear array.
A computer program product comprising a non-transitory computer readable medium storing a computer program for two-dimensional beam forming, the computer program comprising computer program code which, when run on a processing unit, causes the processing unit to:
- alternatingly transmit a first set of reference signals for acquiring channel state information using a two-dimensional antenna array as a first essentially linear array and as a second essentially linear array substantially perpendicular to the first linear array, respectively;
- wherein the computer program is configured such that it causes the two-dimensional antenna array to, when used as said first linear array, transmit one reference signal of said first set per virtual antenna port in said first linear array;
- and
- wherein the computer program is configured such that it causes the two-dimensional antenna array to, when used as said second linear array, transmit one reference signal of said first set per virtual antenna port in said second linear array.
Dependencies are inferred from the claim text.