vblast_encoder.m

VBLAST的QR实现

function [encoder_output,Padding_Bit_Length] = vblast_encoder(Tx_n, encoder_input)
% Tx_n : the Tx antenna number 
% encoder_input :bit stream of 0, 1
% if the length of encoder_input is not multiple of Tx_n,
% it will be padded with 0
% encoder_output's size is[Tx_n, length(encoder_input)/Tx_n)
%------------------------------------------------------------
%for debug
%Tx_n = 2;
%encoder_input = ones(1,100);
%encoder_input(2:3:end) = 2;
%encoder_input(3:3:end) = 3;
%end debug
%------------------------------------------------------------
input_length = length(encoder_input);
temp = mod(input_length, Tx_n);
if temp == 0
    column_num = input_length / Tx_n;
    Padding_Bit_Length = 0;
else
    column_num = (input_length - temp) / Tx_n + 1;
    Padding_Bit_Length = Tx_n - temp;
	encoder_input(input_length+1 : input_length+Padding_Bit_Length) = 0;
end

encoder_output = zeros(Tx_n, column_num);
for col = 1:column_num
	for row = 1:Tx_n
		encoder_output(row, col) = encoder_input((col-1)*Tx_n + row);
	end
end