Approaches for beam selection

A method for a receiver apparatus configured to receive signals from a transmitter apparatus via a transmission beam selected from a plurality of available transmission beams and using a reception beam selected from a plurality of available reception beams, wherein a set of the available transmission beams and a set of the available reception beams are for beam selection measurements by the receiver apparatus, the method comprising:

• acquiring, from the transmitter apparatus, an indication of a collection of linear combinations of reception beams of the set of the available reception beams;
• receiving, using each of the linear combinations of reception beams of the collection of linear combinations of reception beams, a number of measurement signals for beam selection measurements from the transmitter apparatus, wherein the number of measurement signals correspond to a collection of linear combinations of transmission beams of the set of available transmission beams;
• and
• performing beam selection measurements on the number of measurement signals for selection of the transmission beam from the plurality of available transmission beams and for selection of the reception beam from the plurality of available reception beams.

A method for a system comprising a transmitter apparatus and a receiver apparatus, wherein the transmitter apparatus is configured to transmit signals to the receiver apparatus using a transmission beam selected from a plurality of available transmission beams, wherein the receiver apparatus is configured to receive the signals using a reception beam selected from a plurality of available reception beams, and wherein a set of the available transmission beams and a set of the available reception beams are for beam selection measurements by the receiver apparatus, the method comprising:

• determining, by the transmitter apparatus, a collection of linear combinations of transmission beams of the set of the available transmission beams;
• determining, by the transmitter apparatus, a collection of linear combinations of reception beams of the set of available reception beams;
• providing, by the transmitter apparatus to the receiver apparatus, an indication of the collection of linear combinations of reception beams;
• acquiring, by the receiver apparatus from the transmitter apparatus, the indication of the collection of linear combinations of reception beams;
• transmitting, by the transmitter apparatus, each of the linear combinations of transmission beams of the collection of linear combinations of transmission beams;
• receiving, by the receiver apparatus, each of the linear combinations of transmission beams of the collection of linear combinations of transmission beams using each of the linear combinations of reception beams of the collection of linear combinations of reception beams;
• and
• performing, by the receiver apparatus, beam selection measurements on the received linear combinations of transmission beams for selection of the transmission beam from the plurality of available transmission beams and for selection of the reception beam from the plurality of available reception beams.

A computer program product comprising a non-transitory computer readable medium, having thereon a computer program comprising program instructions, the computer program being loadable into a data processing unit and configured to cause execution of a method when the computer program is run by the data processing unit, wherein the method is for a transmitter apparatus configured to transmit signals to a receiver apparatus using a transmission beam selected from a plurality of available transmission beams, wherein the receiver apparatus is configured to receive the signals using a reception beam selected from a plurality of available reception beams, and wherein a set of the available transmission beams and a set of the available reception beams are for beam selection measurements by the receiver apparatus, and wherein the method comprises:

• determining a collection of linear combinations of transmission beams of the set of the available transmission beams;
• determining a collection of linear combinations of reception beams of the set of available reception beams;
• providing an indication of the collection of linear combinations of reception beams to the receiver apparatus;
• and
• transmitting each of the linear combinations of transmission beams of the collection of linear combinations of transmission beams for beam selection measurements by the receiver apparatus.

A transmitter apparatus configured to transmit signals to a receiver apparatus using a transmission beam selected from a plurality of available transmission beams, wherein the receiver apparatus is configured to receive the signals using a reception beam selected from a plurality of available reception beams, and wherein a set of the available transmission beams and a set of the available reception beams are for beam selection measurements by the receiver apparatus, the apparatus comprising controlling circuitry configured to cause:

• determination of a collection of linear combinations of transmission beams of the set of the available transmission beams;
• determination of a collection of linear combinations of reception beams of the set of available reception beams;
• provision of an indication of the collection of linear combinations of reception beams to the receiver apparatus;
• and
• transmission of each of the linear combinations of transmission beams of the collection of linear combinations of transmission beams for beam selection measurements by the receiver apparatus.

A receiver apparatus configured to receive signals from a transmitter apparatus via a transmission beam selected from a plurality of available transmission beams and using a reception beam selected from a plurality of available reception beams, wherein a set of the available transmission beams and a set of the available reception beams are for beam selection measurements by the receiver apparatus, the apparatus comprising controlling circuitry configured to cause:

• acquisition, from the transmitter apparatus, of an indication of a collection of linear combinations of reception beams of the set of the available reception beams;
• reception, using each of the linear combinations of reception beams of the collection of linear combinations of reception beams, of a number of measurement signals for beam selection measurements from the transmitter apparatus, wherein the number of measurement signals correspond to a collection of linear combinations of transmission beams of the set of available transmission beams;
• and
• performance of beam selection measurements on the number of measurement signals for selection of the transmission beam from the plurality of available transmission beams and for selection of the reception beam from the plurality of available reception beams.

A system comprising a transmitter apparatus and a receiver apparatus, wherein the transmitter apparatus is configured to transmit signals to the receiver apparatus using a transmission beam selected from a plurality of available transmission beams, wherein the receiver apparatus is configured to receive the signals using a reception beam selected from a plurality of available reception beams, and wherein a set of the available transmission beams and a set of the available reception beams are for beam selection measurements by the receiver apparatus, wherein:

• the transmitter apparatus is configured to:
• determine a collection of linear combinations of transmission beams of the set of the available transmission beams;
• determine a collection of linear combinations of reception beams of the set of available reception beams;
• provide, to the receiver apparatus, an indication of the collection of linear combinations of reception beams;
• and
• transmit each of the linear combinations of transmission beams of the collection of linear combinations of transmission beams;
• and
• the receiver apparatus is configured to:
• acquire, from the transmitter apparatus, the indication of the collection of linear combinations of reception beams;
• receive each of the linear combinations of transmission beams of the collection of linear combinations of transmission beams using each of the linear combinations of reception beams of the collection of linear combinations of reception beams;
• and
• perform beam selection measurements on the received linear combinations of transmission beams for selection of the transmission beam from the plurality of available transmission beams and for selection of the reception beam from the plurality of available reception beams.