Title :
On the Shannon capacity of chaos-based asynchronous CDMA systems
Author :
Mazzini, G. ; Rovatti, R. ; Setti, G.
Author_Institution :
CEG-DI, Ferrara Univ., Italy
Abstract :
We compare the limit performance of asynchronous DS-CDMA systems based on different sets of spreading sequences, namely chaos-based, ideal random, Gold codes and maximum-length codes. To do so, we consider the Shannon capacity associated to each of those systems that is itself a random variable depending on the relative delays and phases between different users. The statistical features of such a random capacity are evaluated by means of the Monte-Carlo simulation of a proper adjustment of the classical formula for vector AWGN channels. It is shown that chaos-based spreading results in a nonnegligible increase of the capacity.
Keywords :
AWGN channels; chaotic communication; code division multiple access; codes; delays; random sequences; signal processing; statistical analysis; Gold codes; Shannon capacity; asynchronous CDMA systems; chaos-based CDMA systems; chaos-based spreading; delays; ideal random spreading sequence; maximum-length codes; random variable; relative phases; signal processing; vector AWGN channels; AWGN channels; Chaos; Delay; Design engineering; Gold; Multiaccess communication; Signal processing; Statistical analysis; Stochastic systems; Transmitters;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on
Print_ISBN :
0-7803-7589-0
DOI :
10.1109/PIMRC.2002.1046562
