need syntax

need syntax for adding and removing cyclic prefix

[Oleg Komarov]

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

[Walter Roberson]

See also Sana's identical question,

http://www.mathworks.com/matlabcentral/answers/30436-how-to-add-cyclic-prefix-i-want-codings-to-add-it

Answer 1

[UJJWAL]

Hi, Since you mentioned that you just have to add the cyclic prefix, I am writing a code to add the cyclic prefix. The code can be shortened further. I have written in this way just for step-by-step illustration.

clc;
clear all;
length_message = 100;
message = randint(1,length_message,4); %Assuming QPSK symbols 
length_cyclic = 20;
starting = length_message - length_cyclic + 1;
cyclic_prefix = message(starting : end);
prefixed = horzcat(cyclic_prefix,message);

The removal of Prefix I leave on you. It is quite elementary and involves just matrix indexing. Accept the answer if you find it useful