What is CQI in telecom?
What is CQI in telecom?
In the LTE system, the CQI is used by the mobile to indicate the channel quality to the eNB. The CQI reported value is between 0 and 15. This indicates the level of modulation and coding the UE could operate.
What is a good CQI LTE?
What would happen if UE send inaccurate CQI? In HSDPA, the CQI value ranges from 0 ~ 30. 30 indicates the best channel quality and 0,1 indicates the poorest channel quality.
How is CQI measured in LTE?
CQI (Channel Quality Indication) – Instead of expressing the CQI as a received signal quality, the CQI expressed as a data rate that terminal (UE) can support under the actual radio conditions. SINR is used for calculating CQI. In LTE, CQI has only 15 codes. MCS parameter is assigned based on the CQI value.
What is CQI and MCS?
MCS is the modulation and coding scheme that the eNB and UE agreed on. The CQI is a 4-bit integer and is based on the received signal-to-interference-plus-noise ratio (SINR) at the User Equipment (UE) .
What is the reason for poor CQI in LTE?
b) If low CQI values are found after a CQI report is obtained, then downlink interference might be the cause of low throughput. a) Run a report for BLER in the cells identified. The BLER should be smaller or equal than 10%. If the value is larger, then, there is an indication of bad RF environment.
What is CQI in UMTS?
UMTS Quick Reference Go Back To Index Home : www.sharetechnote.com. CQI. CQI stands for Channel Quality Indicator. As the name implies, it is an indicator carrying the information on how good/bad the communication channel quality is. This CQI is for HSDPA.
What is Pa and Pb in LTE?
There are two parameters in LTE Pa and Pb which define the power of the Reference Signals against the other symbols e.g. PDSCH Symbols. I will just explain with an example. If the Pa is -3 and Pb is 1, then that means that the Reference Signals will be having 3 dB higher power than the PDSCH symbols.
What is CQI 5g?
The CQI is an indicator of channel quality. The CQI index is a scalar value from 0 to 15. It provides the information about the highest modulation scheme and the code rate (MCS) suitable for the downlink transmission to achieve the required block error rate (BLER) for given channel conditions.
