cdfrice: Cumulative Distribution Function of the Rice Distribution
Description
This function computes the cumulative probability or nonexceedance probability
of the Rice distribution given parameters ($\nu$ and $\mathrm{SNR}$) of the distribution computed
by parrice. The cumulative distribution function of the distribution is complex and numerical integration of the probability density function is used.
$$F(x) = 1 - Q\biggl(\frac{\nu}{\alpha}, \frac{x}{\alpha}\biggr)$$
where $F(x)$ is the nonexceedance probability for quantile $x$, $Q(a,b)$ is the Marcum Q-function, and $\nu/\alpha$ is a form of signal-to-noise ratio $\mathrm{SNR}$. If $\nu=0$, then the Rayleigh distribution results and pdfray is used. The Marcum Q-function is difficult to work with and the lmomco uses the integrate function on pdfrice.