1] For the present purposes it is convenient to normalize all PSDs for unit signal power so that the FOBP is simply equal to the out-of-band power itself.
The FOBP is readily determined in closed form in terms of the [widely.
The frequency variable for FOBP has been defined by various authors as either the upper band edge frequency or the normalized doublesided bandwidth WT as previously illustrated in the PSD plots.
The resulting FOBP characteristic is similarly compressed in frequency, leading to FOBP2:
However, the expression for FOBP is somewhat more complicated than for the BPSK case.
All of these software packages will most likely suffice for the production of plots over the abscissa range shown previously in the FOBP plot.
To date, no closed-form expression for FOBP has been made widely available.