Title :
Mitigation of Beat Noise in Time–Wavelength Optical Code-Division Multiple-Access Systems
Author :
Bazan, Taher M. ; Harle, David ; Andonovi, Ivan
Author_Institution :
Dept. of Electron. & Electr. Eng., Strathclyde Univ., Glasgow
Abstract :
This paper presents an analysis of two methods for enhancing the performance of two-dimensional time-wavelength Optical code-division multiple-access systems by mitigating the effects of beat noise. The first methodology makes use of an optical hard limiter (OHL) in the receiver prior to the optical correlator; a general formula for the error probability as a function of crosstalk level for systems adopting OHLs is given, and the implications of the OHL´s nonideal transfer characteristics are then examined. The second approach adopts pulse position modulation, and system performance is estimated and compared to that associated with on-off keying
Keywords :
amplitude shift keying; code division multiple access; error statistics; optical crosstalk; optical fibre communication; optical limiters; optical modulation; optical noise; beat noise; crosstalk; error probability; on-off keying; optical correlator; optical hard limiter; pulse position modulation; receiver; time-wavelength optical code-division multiple-access systems; Correlators; Error probability; Multiaccess communication; Optical crosstalk; Optical modulation; Optical noise; Optical pulses; Optical receivers; Performance analysis; Pulse modulation; Optical code-division multiple access (OCDMA); optical hard limiter (OHL); pulse position modulation (PPM); time–wavelength (TW);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2006.884214
