Title :
Gallager codes for multiple user applications
Author :
De Baynast, Alexandre ; Declercq, David
Author_Institution :
Lab. ETIS, Univ. de Cergy Pontoise, France
Abstract :
We study the performance limits of a multiple access system based on the Gallager codes. We show that we can bypass the spreading sequences in a multiple access system. The algebraic orthogonality is replaced by a statistical orthogonality provided by the randomness of the Gallager codes. The performance of our system are close to the optimum achievable bound.
Keywords :
AWGN channels; multi-access systems; multiuser channels; random codes; AWGN; Gallager codes; additive white Gaussian noise channel; multiple access system; multiple user applications; optimum achievable bound; performance limits; random codes; spreading sequences; statistical orthogonality; synchronous multiple access channel; 3G mobile communication; Additive white noise; Belief propagation; Decoding; Fading; Feeds; Interference; Multiaccess communication; Parity check codes; Yarn;
Conference_Titel :
Information Theory, 2002. Proceedings. 2002 IEEE International Symposium on
Print_ISBN :
0-7803-7501-7
DOI :
10.1109/ISIT.2002.1023607
