Reset channel object
reset(chan) resets the
chan, initializing the
as well as internal filter states. This syntax is useful when you
want the effect of creating a new channel.
the channel object
chan and initializes the state
of the random number generator that the channel uses.
a two-element column vector. This syntax is useful when you want to
repeat previous numerical results that started from a particular state.
The example below shows how to obtain repeatable results. The example chooses a state for the random number generator immediately after defining the channel object and later resets the random number generator to that state.
% Set up channel. % Assume you want to maintain continuity % from one filtering operation to the next, except % when you explicitly reset the channel. c = rayleighchan(1e-4,100); c.ResetBeforeFiltering = 0; % Filter all ones. sig = ones(100,1); y1 = [filter(c,sig(1:50)); filter(c,sig(51:end))]; % Reset the channel and filter all ones. reset(c); % Generate an independent channel y2 = [filter(c,sig(1:50)); filter(c,sig(51:end))]; % Plot the magnitude of the channel output plot(abs([y1; y2]),'*') grid on
This example generates the following figure.