Radio Channel Data and the Use Thereof

A method, the method comprising:

• receiving wireless transmission comprising predetermined data from at least one base station of a radio system as a function of reception direction;
• forming taps of a delay profile on the basis of comparison between the data that is received and corresponding predetermined data;
• estimating direction for the taps of the delay profile on the basis of a reception direction;
• and
• forming the radio channel data, for a radio channel model in a multiple input multiple output emulation in an over-the-air chamber having a plurality of antennas around a test zone where a device-under-test is placeable, by associating the taps of the delay profile with the estimated direction.

An apparatus comprising:

• at least one processor;
• and
• at least one memory including a computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus at least to perform a computer process comprising:
• receiving wireless transmission comprising predetermined data from at least one base station of a radio system as a function of reception direction;
• forming taps of a delay profile on the basis of comparison between the data that is received and corresponding predetermined data;
• estimating direction for the taps of the delay profile on the basis of a reception direction;
• and
• forming the radio channel model, for a radio channel model for a multiple input multiple output emulation in an over-the-air chamber having a plurality of antennas around a test zone where a device-under-test is placeable, by associating the taps of the delay profile with the estimated direction.

A computer program product embodied on a distribution medium readable by a computer and comprising program instructions which, when executed by an apparatus, causes the apparatus to perform a computer process comprising:

• receiving wireless transmission comprising predetermined data from at least one base station of a radio system as a function of reception direction;
• forming taps of a delay profile on the basis of comparison between the data that is received and corresponding predetermined data;
• estimating direction for the taps of the delay profile on the basis of a reception direction;
• and
• forming the radio channel model, for a radio channel model for a multiple input multiple output emulation in an over-the-air chamber having a plurality of antennas around a test zone where a device-under-test is placeable, by associating the taps of the delay profile with the estimated direction.