?? const.vhd
字號:
-- File generated by bch.exe program.
-- The constant pacage for BCH code (15,7), t=2
-- with optimisation.
-- GF(2^4) is generated by polynomial [1+x+...] - 11001;
-- Constant necessery for decoder and encoder
PACKAGE const IS
CONSTANT m: INTEGER:= 4;
CONSTANT n: INTEGER:= 15; -- n= 2^m -1 -size of block
CONSTANT k: INTEGER:= 7; -- BCH code (n,k) -no. of information bits
CONSTANT nk: INTEGER:= 8; -- nk=n-k
CONSTANT t: INTEGER:= 2; -- no. of errors to be corrected
CONSTANT sizea: INTEGER:= 3; -- size of counter ca
CONSTANT sizeb: INTEGER:= 3; -- size of counter cb
-- count = iteration* cb + ca
CONSTANT sizel: INTEGER:= 3;
-- size of l integer (degree of error polynomial BMA)
END const;
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