add_orthotrain.m

这个程序主要是实现空时编码的matlab编解码仿真。

function [outdata_block1,outdata_block2,training_sequence1,training_sequence2]=add_orthotrain(data_block1,data_block2,training_length)

%   [outdata_block1,outdata_block2,training_sequence1,training_sequence2]=add_orthotrain(data_block1,data_block2,training_length)
%
%	Output:
%	outdata_block1,2	    - Training sequence and datablock (symbol-vector)
%   training_sequence1,2    - The training sequences, which also is concatenated in outdata_block1,2 (binary-vector)
%	
%   Input:
%   data_block1,2           - Alamouti-coded symbols (symbol-vector)
%   training_length1,2      - Desired length of training sequences (even integer)
%   type                    - Specifies which kind of training sequence to be added (int 0,1)
%                               if type = 0, a random sequence is used.
%                               if type = 1, Karls homemade train.seq is used.
%
%   Short Theoretical Background for the Function:
%
%   Superpositions two orthogonal training-sequences in front of each datablock.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%     
%%% Function part of simulation for Space-Time
%%% coding project, group Grey-2001.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%   Author: Stefan Uppg錼d
%   Date: 2001-03-19
%   Version: 1.0 (add_training)
%   Revision (Name & Date):
%   2.0 SU  2001-04-04  Adds bpsk-symbols to data. Function supposed to be called
%                       after that Alamouti-coding already has been performed.
%                       This function uses the model parameter and adds two
%                       training-sequences when a 2x? is used.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

[training_sequence1, training_sequence2]=make_orthotrain(training_length);

training_sequence1_symb = bpsk(training_sequence1,1);
training_sequence2_symb = bpsk(training_sequence2,1);

outdata_block1 = [training_sequence1_symb data_block1];
outdata_block2 = [training_sequence2_symb data_block2];