Title :
Pseudo-chaotic time hopping for UWB impulse radio
Author :
Maggio, Gian Mario ; Rulkov, Nikolai ; Reggiani, Luca
Author_Institution :
Center for Wireless Commun., California Univ., San Diego, La Jolla, CA, USA
Abstract :
In this paper, we propose a pseudo-chaotic modulation suitable for ultrawide-bandwidth impulse-radio communication systems. The coding scheme is based upon controlling the symbolic dynamics of a chaotic map for encoding the digital information to be transmitted. The pseudo-chaotic time hopping enhances the spread-spectrum characteristics of the system, by removing most periodic components from the transmitted signal. A maximum-likelihood detector for the proposed scheme is presented and its scalability features are illustrated. Finally, theoretical performance bounds for both soft and hard Viterbi decoding are derived and compared with the simulation results.
Keywords :
Viterbi decoding; chaotic communication; encoding; error statistics; maximum likelihood detection; modulation coding; pulse position modulation; spread spectrum communication; synchronisation; ultra wideband communication; UWB impulse radio; chaotic map; coding scheme; hard Viterbi decoding; maximum-likelihood detector; pseudo-chaotic modulation; pseudo-chaotic time hopping; scalability features; soft Viterbi decoding; spread-spectrum characteristics; symbolic dynamics; ultrawide-bandwidth impulse-radio communication; Chaotic communication; Communication system control; Communication systems; Detectors; Encoding; Maximum likelihood decoding; Maximum likelihood detection; Scalability; Spread spectrum communication; Viterbi algorithm;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
DOI :
10.1109/TCSI.2001.972849
