Title :
Theoretical Analysis of Optical Wireless CDMA with Modified Pseudo Orthogonal M-Sequence Sets
Author :
Kozawa, Yusuke ; Habuchi, Hiromasa
Author_Institution :
Coll. of Eng., Ibaraki Univ., Ibaraki, Japan
Abstract :
In this paper, to increase normalized throughput of the optical wireless code-division multiple-access (CDMA) system, modified pseudo orthogonal M-sequences (MPOMS) are considered as optical pseudo-noise (PN) code. Moreover, the bit error rate (BER) performance of the optical wireless CDMA system using multi-pulse pulse position modulation (MPPM) is also derived in the presence of the scintillation, background-noise, avalanche photo-diode (APD) noise, thermal noise and signal dependence noise. Consequently, the BER performance in consideration of normalized throughput of the MPPM system with MPOMS is superior to that of the MPPM system with conventional pseudo orthogonal M-sequences in the single-user case and multi-user case.
Keywords :
code division multiple access; error statistics; noise; optical communication; avalanche photodiode noise; background noise; bit error rate performance; modified pseudo orthogonal M-sequences; modified pseudoorthogonal m-sequence sets; multipulse pulse position modulation; normalized throughput; optical pseudonoise code; optical wireless CDMA system; optical wireless code-division multiple-access system; scintillation; signal dependence noise; thermal noise; Biomedical optical imaging; Bit error rate; Code division multiplexing; Multiaccess communication; Optical modulation; Optical noise; Optical sensors; Optical transmitters; Throughput; Wireless communication;
Conference_Titel :
Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-4148-8
DOI :
10.1109/GLOCOM.2009.5426179
