The theoretical limits of asynchronous DS-CDMA systems over AWGN channels are investigated by computing the statistics of the associated Shannon capacity. A comparison is reported between chaos-based spreading and ideal random spreading Gold codes and maximum-length codes. It is shown that chaos-based spreading results in a nonnegligible increase of the capacity.
References
-
-
1)
-
Kennedy, M.P., Rovatti, R., Setti, G.: `Chaotic electronics in telecommunications', CRC Press, Boca Raton, Florida, June 2000.
-
2)
-
R. Rovatti ,
G. Mazzini ,
G. Setti
.
Enhanced rake receivers for chaos-based DS-CDMA.
IEEE Trans. Circ. Sys. I
,
818 -
829
-
3)
-
S. Verdù
.
The capacity region of the symbol-asynchronous Gaussian multiple access channel.
IEEE Transactions on Information Theory
,
733 -
751
-
4)
-
G. Mazzini ,
R. Rovatti ,
G. Setti
.
Interference minimization by auto-correlation shaping in asynchronous DS-CDMA systems: chaos-based spreading is nearly optimal.
IEE Electron. Lett.
,
1054 -
1055
-
5)
-
T. Kohda ,
H. Fujisaki
.
Variances of multiple access interference code averageagainst data average.
Electron. Lett.
,
1717 -
1719
-
6)
-
G.J. Foschini ,
M.J. Gans
.
On limits of wireless communications in a fading environment when using multiple antennas.
Wirel. Pers. Commun.
,
3 ,
311 -
335
http://iet.metastore.ingenta.com/content/journals/10.1049/el_20020338
Related content
content/journals/10.1049/el_20020338
pub_keyword,iet_inspecKeyword,pub_concept
6
6