This function implements one step of the sequential importance sampling method for fading channels.
SISstep.fading(mm, xx, logww, yyy, par, xdim2, ydim)The function returns a list with the following components:
the new sample.
the log weights.
the Monte Carlo sample size m.
the sample in the last iteration.
the log weight in the last iteration.
the observations with T columns and ydim rows.
a list of parameter values. HH is the state coefficient model, WW*t(WW) is the state innovation covariance matrix,
VV*t(VV) is the covariance of the observation noise, GG is the observation model.
the dimension of the state variable x_t.
the dimension of the observation y_t.
Tsay, R. and Chen, R. (2018). Nonlinear Time Series Analysis. John Wiley & Sons, New Jersey.