function x = SymbolStream(Nbits,Lx);% x = SymbolStream(Nbits,Lx);%% produces a stream of Lx symbols of Nbits bits.% S Weiss, 10/10/2000Levels = 2^Nbits;x = round(Levels*rand(1,Lx)-.5);x(x>(Levels-1)) = Levels-1;x(x<0) = 0;