mytelcolearning

  Above stats of variation of CQI vs utilization and traffic is self explanatory that yes CQI will get detoriated with increase inpayload as well as PRB utilization >60% Utilization is critical as latency increases exponentially along with almost 3% degradation in cqi with 1% increase in utlization 

It was discovered that 4Tx Transmit Diversity results in up to 1 dB performance penalty compared to 2Tx Transmit Diversity. Therefore, an offset for mentioned algorithm is needed to allow a slightly more conservative choice of aggregation level with 4Tx and that offset is pdcchCqiShift4Tx  Trail Result for pdcchCqiShift4Tx =-1.5 for Nokia