Need help with STBC and STTC coding

[almasbd]

gngauss error

Hi,

in mimo system using space time block coding and space time trellis
coding other lyred space time coding .


i know only conventional coding and block coding.


is STBC or or STTC are extended of Con cod and block cod?


when i study in MIMO related journal paper then i found chanel is
multipath fading this portion i m not very clear?


m i clear? by using stbc for mimo system performance is very good
against channel noise.


i have to right a coding BPSK for awgn from the book.


i m not clear this coding, what do u mean inside the coding


function [n1,n2]=gngauss(m,sgma)
% [n1 n2]=gngauss(m,sgma)
% [n1 n2]=gngauss(sgma)
% [n1 n2]=gngauss
% GNGAUSS generates two independent gaussian variables with
% mean m & S.D sgma
% if one of the input argement missing it takes mean as zero
% if neither mean nor variance is given, it generates two
%standard gaussian random variables


if nargin==0
m=0;
sgma=1;
elseif nargin==1
sgma=m;
m=0;
end
u=rand; % uniform random variable in (0,1)
z=sgma*(sqrt(2*log(1/(1-u)))); % rayleigh distributed random variable
u=rand; % another uniform distributed variable
in (0,1)
n1=m+z*cos(2*pi*u);
n2=m+z*sin(2*pi*u);


in stbc or sttc which type of error correction coding is better?

thanks in advance.