出典:Wikipedia
出典:『Wikipedia』 (2011/06/14 06:02 UTC 版)
The Hadamard code, named after Jacques Hadamard, is a system used for signal error detection and correction. It is one of the family of [2n, n + 1, 2n − 1] codes. Especially for large n it has a poor rate but it is capable of correcting many errors. Hadamard codes can be considered as a special case of Reed–Muller codes. In particular, first order Reed–Muller code are equivalent to Hadamard codes.