Table 2 Seven typical SP-based parameters [19]

Energy of r(t): \(E_r=\int _{-\infty }^{\infty } |r(t)|^2\,dt\)

Maximum amplitude of r(t): \(A_{max}=\max \limits _{t} |r(t) |\)

Mean excess delay: \(\tau _m=\int _{-\infty }^{\infty }t|r(t)|^2\,dt/\int _{-\infty }^{\infty }|r(t)|^2\,dt\)

RMS delay spread: \(\tau _{RMS}=\sqrt{\int _{-\infty }^{\infty }(t-\tau _m)^2|r(t)|^2\,dt/\int _{-\infty }^{\infty }|r(t)|^2\,dt}\)

Mean of \(|r(t)|\): \(\mu _{|r |}=\frac{1}{T}\int _{T}|r(t)|\,dt\)

Standard deviation of \(|r(t)|\): \(\sigma _{|r(t)|}^2=\frac{1}{T}\int _{T}|r(t)-\mu _{|r |}|^2\,dt\)

Kurtosis of \(|r(t)|\): \(k=\frac{1}{\sigma _{|r|}^4}\int _{T}{(|r(t)|-\mu _{|r |})}^4\,dt\)