Title :
Two techniques for constructing DC-free codes with minimum distance 4
Author :
Popplewell, A. ; Reilly, J. J O´
Author_Institution :
Sch. of Electron. Eng. & Comput. Syst., Univ. Coll. of North Wales, Bangor, UK
fDate :
27 Jun-1 Jul 1994
Abstract :
Two techniques for constructing DC-free codes with minimum distance 4 are presented. These constructions result in very low complexity implementation and allow both hard and soft decision decoding to be applied. Construction 1 is based on adapting an algorithm developed for constructing a class of low complexity runlength limited error control codes having a maximum runlength constraint of 6 and minimum distance 4. Construction 2 is based on utilising simple array codes based on two parity check codes and mapping balanced words onto each row of the array (the same mapping being applied to every row) in place of the even parity word
Keywords :
decoding; error correction codes; runlength codes; DC-free codes; array codes; even parity word; hard decision decoding; line codes; low complexity code; maximum runlength constraint; minimum distance; parity check codes; runlength limited error control codes; soft decision decoding; Adaptive arrays; Convolutional codes; Decoding; Error correction; Error correction codes; Magnetic noise; Noise shaping; Optical noise; Parity check codes; Systems engineering and theory;
Conference_Titel :
Information Theory, 1994. Proceedings., 1994 IEEE International Symposium on
Conference_Location :
Trondheim
Print_ISBN :
0-7803-2015-8
DOI :
10.1109/ISIT.1994.394760
