Title :
Optimal PWR Codes for TH-PPM UWB Multiple-Access Interference Mitigation
Author :
Kouassi, K. ; Clavier, Laurent ; Doumbia, I. ; Rolland, P.
Author_Institution :
Inst. d´Electron., de Microelectron. et de Nanotechnol. (IEMN), Villeneuve d´Ascq, France
Abstract :
The objective of this work is to enhance performance of impulse radio ultra wide band transmissions in multiple-user environment, without implementing complex multiuser detectors. A new scrambling scheme, randomising the pulse width, is introduced at the transmitter. It allows both to improve the spectral occupancy of the transmitted signal and the resistance to interference. This informationless scrambler is analysed and optimised with an evolutionary algorithm to achieve, according to simulations, significant improvement.
Keywords :
codes; interference suppression; multi-access systems; multiuser detection; radio transmitters; ultra wideband communication; TH-PPM UWB multiple-access interference mitigation; complex multiuser detector; evolutionary algorithm; impulse radio ultra wide band transmissions; multiple-user environment; optimal PWR code; transmitter; Bit error rate; Delay; Detectors; Genetic algorithms; Interference; Optimization; Signal to noise ratio; IR-UWB; Multi access; error probability; genetic algorithm; multiobjective optimisation;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2012.112812.122204
