Sinr

Assumption of SINR measurement

Assumption of SINR measurement
  1. How is SINR measured?
  2. What is a good SINR?
  3. Why is SINR negative?
  4. What is SINR?

How is SINR measured?

Signal to Interference plus Noise Ratio (SINR) is measured by UE on Resource Block (RB) basis. UE computes SINR on each RB, converts it to CQI and reports it to eNodeB where it is used to select the most suitable MCS for user data transmission in particular RB.

What is a good SINR?

Generally, a signal with an SNR value of 20 dB or more is recommended for data networks where as an SNR value of 25 dB or more is recommended for networks that use voice applications.

Why is SINR negative?

The negative SNR means that the signal power is less than the noise power. The value of -30 dB is below the minimum SNR of -20 dBm @ SF12, so it does not guarantee that the receiver will be able to demodulate the signal.

What is SINR?

SINR (Signal to Interference & Noise Ratio) measures signal quality: the strength of the wanted signal compared to the unwanted interference and noise.

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