Title :
Optical multi-wavelength PPM for high data rate transmission on indoor channels
Author :
TANAKA, Yuichi ; Nakagawa, Masao
Author_Institution :
Dept. of Electr. Eng., Keio Univ., Kanagawa, Japan
Abstract :
In indoor optical channels, intersymbol interference (ISI) due to the multipath propagation prevents high data rate transmission. A new optical multi-wavelength PPM (pulse position modulation) has been investigated for improving the quality of transmission. In this strategy, parallel transmission is accomplished which lowers the data rate per channel and thus reduces the effect of ISI. Furthermore, this strategy also implements a parallel coding technique in the predetermined parallel branches. This parallel coding corrects errors without changing the system data rate. The simulation results show that a combination of these methods can achieve high quality transmission without reduction of the total data rate
Keywords :
error correction codes; interference suppression; intersymbol interference; multipath channels; optical communication; optical modulation; pulse position modulation; wavelength division multiplexing; wireless LAN; ISI reduction; WDM; data rate per channel; error correction; high data rate transmission; indoor channels; intersymbol interference; multipath channels; multipath propagation; optical multi-wavelength PPM; parallel branches; parallel coding; parallel transmission; pulse position modulation; simulation results; system data rate; transmission quality improvement; wireless LAN; Decoding; Intersymbol interference; Optical modulation; Optical propagation; Optical pulses; Optical receivers; Optical transmitters; Pulse modulation; Wavelength division multiplexing; Wireless LAN;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1997. Waves of the Year 2000. PIMRC '97., The 8th IEEE International Symposium on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-3871-5
DOI :
10.1109/PIMRC.1997.627032
