Title :
Interference bounds for DS-CDMA systems based on chaotic piecewise-affine Markov maps
Author :
Rovatti, Riccardo ; Mazzini, Gianluca ; Setti, Gianluca
Author_Institution :
Dept. of Electron., Bologna Univ., Italy
fDate :
6/1/2000 12:00:00 AM
Abstract :
The performance of chaos-based asynchronous direct sequence-code division multiple access (DS-CDMA) systems are analyzed in the additive white Gaussian noise (AWGN) channel case. Previous upper bounds on the expected cochannel interference are improved and complemented with lower bounds accounting for maximum achievable performance. The bases for this investigation are mathematical tools from the statistical theory of dynamical systems and in particular some spectral properties of finite-dimensional restrictions of the Perron-Frobenius operator. A general lower bound is provided along with stricter upper and lower bounds in the particular case of piecewise-affine Markov (PWAM) maps used as spreading sequence generators. Detailed numerical examples of bound applicability are also provided
Keywords :
AWGN; Markov processes; chaos; cochannel interference; code division multiple access; interference (signal); piecewise linear techniques; spread spectrum communication; DS-CDMA systems; Perron-Frobenius operator; additive white Gaussian noise channel; bound applicability; chaotic piecewise-affine Markov maps; cochannel interference; finite-dimensional restrictions; interference bounds; spreading sequence generators; statistical theory; upper bounds; AWGN; Additive white noise; Availability; Chaos; Chaotic communication; Communication systems; Interchannel interference; Multiaccess communication; Performance analysis; Upper bound;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
