Gh. Smith et al., Dispersion effects in millimeter-wave fiber-radio systems employing direct-sequence code division multiple access, OPT FIBER T, 5(2), 1999, pp. 165-174
We investigate the impact of fiber chromatic dispersion on the performance
of an externally modulated millimeter-wave fiber-radio system incorporating
a broadband radio direct-sequence code division multiple access (DS-CDMA)
scheme. In particular, we investigate the effect of dispersion on DS-CDMA s
ignals with regard to CDMA code rate, center frequency, and modulator chirp
. We show that the spreading of the signal spectrum using DS-CDMA can resul
t in significant reductions in data amplitude variations normally experienc
ed in externally modulated millimeter-wave fiber-radio systems. We also dem
onstrate the successful transmission of a 10-Mb/s data channel over a 39-GH
z fiber-radio link employing DS-CDMA and consisting of 25 km of standard op
tical fiber and a 1-m radio link. (C) 1999 Academic Press.