Title :
Improving PPM schemes in wireless infrared links at high bit rates
Author :
García-Zambrana, Antonio ; Puerta-Notario, Antonio
Author_Institution :
Dept. de Ingenieria de Commun., Malaga Univ., Spain
fDate :
3/1/2001 12:00:00 AM
Abstract :
The authors conclude that pulse-position modulation (PPM) with Gaussian pulses provides better performance than classic PPM schemes with rectangular pulses over unguided optical links operating at high bit rates. In this fashion, both intersymbol interference (ISI), induced by multipath propagation, and the phase distortion effects due to the high-pass filter whose function is to suppress interference, are minimized. However, relevant improvement is not achieved if compared with the OOK format with Gaussian pulses and low duty cycle. The above conclusion is validated by the corresponding bit-error rate (BER) computation using Monte Carlo simulations.
Keywords :
Gaussian processes; error statistics; intersymbol interference; optical communication; optical links; optical modulation; pulse position modulation; pulse shaping; 100 Mbit/s; 50 Mbit/s; BER; Gaussian pulses; ISI; Monte Carlo simulations; OOK format; PPM; WLAN; bit-error rate; high bit rates; high-pass filter; interference suppression; intersymbol interference; low duty cycle; multipath propagation; performance; phase distortion; pulse-position modulation; puse shaping; rectangular pulses; signaling codes; unguided optical links; wireless infrared links; wireless local area networks; Bit error rate; Bit rate; Interference suppression; Intersymbol interference; Optical fiber communication; Optical filters; Optical propagation; Optical pulses; Phase distortion; Pulse modulation;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.913151