DocumentCode
3150526
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
fYear
1994
fDate
25-28 Sep 1994
Firstpage
210
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;
fLanguage
English
Publisher
ieee
Conference_Titel
Electrical and Computer Engineering, 1994. Conference Proceedings. 1994 Canadian Conference on
Conference_Location
Halifax, NS
Print_ISBN
0-7803-2416-1
Type
conf
DOI
10.1109/CCECE.1994.405726
Filename
405726
Link To Document