Abstract
In this paper, we demonstrate and compare experimentally two techniques
achieving very high-data-rates (${ > }1$ Gb/s) wireless transmission in the 60 GHz window using radio over
fiber (RoF) for reach extension. The first RoF link is based on a 10 GHz
vertical-cavity surface-emitting laser and uses a multimode fiber. The radio
signal is transported on an intermediate frequency of 4.5 GHz and
electrically upconverted to 60 GHz after the optical link. The second uses
an optical frequency upconversion from 4.5 to 60 GHz by direct modulation of
a mode-locked Fabry–Pérot laser whose self-pulsating
frequency is 54.8 GHz before transmission over a single-mode fiber. For both
techniques, two different types of modulation were tested. The first one was
an on–off keying at 1.5 Gb/s and the second
one was an orthogonal frequency-division multiplexing-QPSK signal compliant
to the IEEE 802.15.3.c prestandard (3.03 Gb/s). Radio propagation
performance is also
reported.
© 2009 IEEE
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