📄 len31_preamble_code.m
字号:
%
% Return the length 31 ternary preamble code with Code Index "id" from the
% set of 8 length 31 codes of 802.15.4.a
%
% function x = len31_preamble_code(id)
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function x = len31_preamble_code(id)
X = [ -1 0 0 0 0 1 0 -1 0 1 1 1 0 1 -1 0 0 0 1 -1 1 1 1 0 0 -1 1 0 -1 0 0 ;
0 1 0 1 -1 0 1 0 1 0 0 0 -1 1 1 0 -1 1 -1 -1 -1 0 0 1 0 0 1 1 0 0 0 ;
-1 1 0 1 1 0 0 0 -1 1 -1 1 1 0 0 1 1 0 1 0 0 -1 0 0 0 0 -1 0 1 0 -1 ;
0 0 0 0 1 -1 0 0 -1 0 0 -1 1 1 1 1 0 1 -1 1 0 0 0 1 0 -1 0 1 1 0 -1 ;
-1 0 1 -1 0 0 1 1 1 -1 1 0 0 0 -1 1 0 1 1 1 0 -1 0 1 0 0 0 0 -1 0 0 ;
1 1 0 0 1 0 0 -1 -1 -1 1 -1 0 1 1 -1 0 0 0 1 0 1 0 -1 1 0 1 0 0 0 0 ;
1 0 0 0 0 1 -1 0 1 0 1 0 0 1 0 0 0 1 0 1 1 -1 -1 -1 0 -1 1 0 0 -1 1 ;
0 1 0 0 -1 0 -1 0 1 1 0 0 0 0 -1 -1 1 0 0 -1 1 0 1 1 -1 1 1 0 1 0 0 ;];
x = X(id,:);
return;
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