6.3.0 General
38.521-43GPPNRPart 4: PerformanceRadio transmission and receptionRelease 17TSUser Equipment (UE) conformance specification
The minimum performance requirements of PMI reporting are defined based on the precoding gain, expressed as the relative increase in throughput when the transmitter is configured according to the UE reported PMI compared to the case when the transmitter is using random precoding, respectively. When the transmitter uses random precoding, for each PDSCH allocation a precoder is randomly generated with equal probability of each applicable i1 and i2 combination and applied to the PDSCH. A fixed transport format (FRC) is configured for all requirements.
The requirements for transmission scheme 1 with higher layer parameter codebookType set to ‘typeI-SinglePanel’ are specified in terms of the ratio:
In the definition of γ, for 4TX, 8TX, 16TX, and 32TX PMI requirements, 
is 90 % of the maximum throughput obtained at 
using the precoders configured according to the UE reports, and 
is the throughput measured at 
with random precoding.
The requirements for transmission scheme 1 with higher layer parameter codebookType set to ‘typeII’ or ‘typeII-r16’ are specified in terms of the ratio:
In the definition of γ, for 16TX PMI requirements, 
is 90 % of the maximum throughput obtained at 
using the precoders configured according to the UE reports, and 
is the throughput measured at 
with random precoding.