Title :
Analysis of hierarchical multi-pulse PPM using modified pseudo orthogonal M-sequence set
Author :
Kozawa, Yusuke ; Habuchi, Hiromasa
Author_Institution :
Dept. of Electr. Eng., Tokyo Univ. of Sci., Noda, Japan
Abstract :
In this paper, to enhance the data transmission rate of the optical wireless hierarchical transmission system, the new hierarchical modulation scheme is proposed. The proposed system is designed based on multi-pulse pulse-position modulation (MPPM) using modified pseudo orthogonal M-sequence sets as a pseudo-noise code. The symbol error rate (SER) performance is derived taking into account the effect of the scintillation, background-noise, avalanche photo-diode (APD) noise, thermal noise, and signal dependence noise. Our results show that the data transmission rate performance improves significantly compared with the conventional MPPM system. Moreover, it is found that the proposed system can realize the hierarchical modulation scheme, and the SER performance of the proposed MPPM system can achieve that of the conventional MPPM system by increasing the number of slots for MPPM.
Keywords :
avalanche photodiodes; light transmission; m-sequences; optical communication; optical modulation; pseudonoise codes; pulse position modulation; scintillation; thermal noise; APD; SER; avalanche photodiode noise; background-noise; data transmission rate enhancement; hierarchical MPPM; hierarchical modulation scheme; modified pseudoorthogonal M-sequence set; multipulse pulse-position modulation; optical wireless hierarchical transmission system; pseudonoise code; scintillation effect; signal dependence noise; symbol error rate; thermal noise; Correlation; Data communication; High speed optical techniques; Modulation; Noise; Optical receivers; Optical transmitters;
Conference_Titel :
Information Theory and its Applications (ISITA), 2012 International Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4673-2521-9
