Efficient Chaotic Spreading Codes for DS-UWB Communication System

Author

Shanmugam, Surendran K. ; Leung, Henry

Author_Institution

Dept. of Geomatics Eng., Calgary Univ., Alta.

Volume

4

fYear

2006

fDate

14-19 May 2006

Abstract

Ultra wideband (UWB) technology is characterized by transmitting extremely short duration radio pulses. To improve its multiple access (MA) capability, UWB technology can be combined with traditional spread spectrum (SS) techniques. Existing spreading codes are only optimal in additive white Gaussian noise (AWGN) and their performance degrades in multipath fading and narrow band interference. In this paper, we propose the use of spreading codes obtained using a novel design methodology based on genetic programming (GP) and DNA computation for DS-UWB communications. The spreading codes obtained by this novel design methodology performs better than traditional spreading codes in both AWGN and multipath fading. In addition, spreading codes with desired spectral characteristics could be designed to minimize the mutual interference between the DS-UWB and co-existing narrowband systems. The proposed design methodology is attractive for spreading code in terms of performance and flexibility to design spreading codes for a specific design criteria

Keywords

AWGN channels; channel coding; fading channels; genetic algorithms; multi-access systems; multipath channels; radiofrequency interference; spread spectrum communication; ultra wideband communication; AWGN; DS-UWB communication system; additive white Gaussian noise; chaotic spreading codes; genetic programming; multipath fading; multiple access; narrow band interference; spread spectrum techniques; ultra wideband technology; AWGN; Additive white noise; Chaotic communication; Design methodology; Fading; Genetic programming; Interference; Narrowband; Spread spectrum communication; Ultra wideband technology;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on

Conference_Location

Toulouse

ISSN

1520-6149

Print_ISBN

1-4244-0469-X

Type

conf

DOI

10.1109/ICASSP.2006.1661016

Filename

1661016