SINR to CQI Mapper

Map SINR values to CQI index for LTE.

LTE SINR to CQI Mapper

Professional Signal Quality Analysis based on 3GPP TS 36.213

3GPP COMPLIANT

SINR Input

15.0dB

VERY GOOD

-1040

Quick Presets:

CQI Analysis

CQI INDEX

Modulation

64QAM

Code Rate

772/1024

Spectral Efficiency

4.5234 bits/symbol

Use Case

Excellent signal

Throughput Estimation

57.0Mbps

ESTIMATED PEAK DL THROUGHPUT

BANDWIDTH

MIMO LAYERS

PRBs

100

SUBCARRIERS

12/PRB

SYMBOLS

14/slot

15.0 dB

-10-50510152025303540

SINR (dB)

Out of Range (CQI 0)

QPSK (CQI 1-6)

16QAM (CQI 7-9)

64QAM (CQI 10-15)

What is CQI?

Channel Quality Indicator (CQI) is a measurement reported by UE to eNB indicating the quality of the downlink channel. It helps the network select optimal modulation and coding scheme (MCS).

SINR Importance

Signal-to-Interference-plus-Noise Ratio (SINR) directly affects throughput and reliability. Higher SINR enables higher order modulation (64QAM) and better spectral efficiency.

3GPP Reference

This mapping follows 3GPP TS 36.213 Table 7.2.3-1 for CQI to MCS mapping. Values are used for link adaptation in LTE networks.

Based on 3GPP TS 36.213 - E-UTRA Physical layer procedures