C.2 FR1 Base Station beam configuration

38.1513GPPNRRelease 17TSUser Equipment (UE) Multiple Input Multiple Output (MIMO) Over-the-Air (OTA) performance requirements

The emulated BS beam configuration to be used for all emulation of channel models defined in Annex C.1 is specified in this clause.

The Base Station beam configuration includes basic antenna parameters and beamforming characteristic. The basic BS antenna parameters is defined in Table C.2-1.

Table C.2-1: BS Antenna Parameters

Parameter description

Symbol

Parameter value

FR1 ≤2.5GHz

FR1 >2.5GHz

Antenna panels in vertical dimension

Mg

1

1

Antenna panels in horizontal dimension

Ng

1

1

Elements per panel in vertical dimension

Me

4

8

Elements per panel in horizontal dimension

Ne

8

8

Number of polarizations per panel

P

2

2

Element spacing in horizontal dimension ()

dH

0.5

0.5

Element spacing in vertical dimension ()

dV

0.5

0.5

Antenna element radiation patterns, including orientation of the element main polarization components as well as orientation of the antenna array are as in the example pattern in Table 7.3-1 of TR38.901. The antenna element has ±45 polarization components and the radiation pattern parameters are 3dB = 65, 3dB = 65, Amax = 30dB, SLAv = 30dB, GE,max =8 dBi.

The beamforming characteristic of the FR1 BS pattern is defined as follow:

– A code book of 60 fixed beams is constructed to a grid of five elevation angles from –20 to +20 with 10 steps and 12 azimuth angles from –80 to +80 with ~15 steps;

– For 4×4 MIMO OTA, two strongest transmitting beams are selected from the pre-defined beam grid based on their proximity to the strong clusters of each FR1 channel model. These beams should have different azimuth directions and can provide the highest receive power for UE.

– For 2×2 MIMO OTA, 1 strongest transmitting beam is selected from the pre-defined beam grid which provides the highest received power for UE based on the FR1 channel model.

– Beam directions for channels model given in Annex C.1 are:

– For UMa CDL-C, the beam directions are:

– Strongest beam: AoD: -7.27°, ZoD: 100°

– 2nd strongest beam: AoD: -21.82°, ZoD: 100°

– For UMi CDL-C, the strongest beam direction is: AoD: -7.27°, ZoD: 100°.