Title :
Very low rate quasi-optimal convolutional codes for CDMA
Author :
Lefrançois, Stéphan ; Haccoun, David
Author_Institution :
Dept. of Electr. & Comput. Eng., Ecole Polytech. de Montreal, Que., Canada
Abstract :
The applications of low rate convolutional codes in code division multiple access (CDMA) and high error rate channels is well known. Unfortunately. In searching for optimal long constraint length and very low rate codes the computational effort is prohibitive. In this paper. A method for generating quasi-optimum new very low rate (1/128⩽R⩽1/3) and moderately long constraint length (K⩽14) codes is presented. These codes have the interesting characteristics of being rate compatible and easy to generate. The codes presented in this paper provide superior performances to the known low rate codes of the same rates and constraint lengths
Keywords :
code division multiple access; convolutional codes; CDMA; code division multiple access; convolutional codes; high error rate channels; moderately long constraint length codes; nested codes; quasi-optimal codes; rate compatible codes; very low rate codes; Code division multiaccess; Convolutional codes;
Conference_Titel :
Electrical and Computer Engineering, 1994. Conference Proceedings. 1994 Canadian Conference on
Conference_Location :
Halifax, NS
Print_ISBN :
0-7803-2416-1
DOI :
10.1109/CCECE.1994.405726
