Title :
Computationally efficient methods for bit-error rate evaluation in weakly coherent optical systems
Author :
Ribeiro, Rui F S ; Rocha, José R Ferreira da
Author_Institution :
Dept. de Electron. e Telecoms, Aveiro Univ., Portugal
fDate :
10/1/1994 12:00:00 AM
Abstract :
A semianalytical method to estimate the bit-error rate performance of nonsynchronous ASK and FSK optical heterodyne systems is presented. This approach takes into account numerous system details with an accuracy similar to Monte-Carlo simulation, but with a computation time reduced by several orders of magnitude. An analytical approximation, based on a closed-form expression for the decision variable moment generating function, is also presented. The results obtained with the semianalytical method and the analytical approximation are compared to Monte-Carlo simulation results and to measurements obtained on a practical FSK system
Keywords :
amplitude shift keying; approximation theory; demodulation; frequency shift keying; light coherence; optical links; optical modulation; FSK optical heterodyne systems; analytical approximation; bit-error rate evaluation; bit-error rate performance; closed-form expression; computation time; computationally efficient methods; decision variable moment generating function; nonsynchronous ASK optical heterodyne systems; practical FSK system; semianalytical method; weakly coherent optical systems; Bit error rate; Frequency shift keying; Gaussian distribution; Laser modes; Laser noise; Optical computing; Optical filters; Optical mixing; Optical sensors; Phase noise;
Journal_Title :
Lightwave Technology, Journal of
