Table 2 The proposed CQI quantizer (SUS-ee)

Level 1

$0<x<0.7^2{\gamma }_{3:Q_3}$

$0<x<0.9^2{\gamma }_{3:Q_3}$

Level 2

$0.7^2{\gamma }_{3:Q_3}\le x<0.8^2{\gamma }_{2:Q_2}$

$0.9^2{\gamma }_{3:Q_3}\le x<0.95^2{\gamma }_{2:Q_2}$

Level 3

$0.8^2{\gamma }_{2:Q_2}\le x<0.85^2{\gamma }_{1:Q_1}$

$0.95^2{\gamma }_{2:Q_2}\le x<{\gamma }_{1:Q_1}$

Level 4

$0.85^2{\gamma }_{1:Q_1}\le x<\infty$

${\gamma }_{1:Q_1}\le x<\infty$

Expected

${\gamma }_{a:Q_a}=2{\sigma }^2\rho \log Q_a$

${\gamma }_{a:Q_a}=2{\sigma }^2\rho \left[\log \left(\frac{\left(\begin{array}{c}3\\ 2\end{array}\right)Q_a}{2{\sigma }^2\rho }\right)-\log \left[\log \left(\frac{\left(\begin{array}{c}3\\ 2\end{array}\right)Q_a}{2{\sigma }^2\rho }\right)-\frac{1}{2{\sigma }^2\rho }\right]\right]$

CQI