function [unbiased_signal]=remove_mean(received_signal)%   [unbiased_signal]=remove_mean(received_signal)%%	%	Output:%   unbiased_signal     -   Received signal minus its mean.%   %   Input:%   received_signal     -   Signal from analog-digital converter in frontend.%%   Short Theoretical Background for the Function:%   %   Creating an unbiased signal in the receiver simply%   by removing the mean of incoming signal.%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%     %%% Function part of simulation for Space-Time%%% coding project, group Grey-2001.%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   Author: Stefan Uppg錼d%   Date: 30-03-2001%   Version: 1.0%   Revision (Name & Date & Comment):%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%K   = length(received_signal);sum = sum(received_signal);mean_rec = sum/K;unbiased_signal = received_signal - mean_rec;%%%%%% Of course, the mean-function in Matlab could have been used.%%% Assume my operations are equivalent in calculation-comsumtion.%%%