Abstract
A two millimeter-wave signal generation scheme for a bidirectional 60 GHz radio-over-fiber system is theoretically analyzed and numerically verified. Three dual-electrical Mach–Zehnder modulators (MZMs) and two optical interleavers (OILs) are employed, and MZM1, MZM2, and MZM3 are biased at the minimum, maximum, and minimum transmission points, respectively. The two OILs and a fiber Bragg grating are used to separate the subcarriers after transmission. In the scheme, a tunable laser serves as the optical source, and two 60 GHz millimeter-wave signals with modulating data are generated to transmit diversity, and a remote local oscillator is also generated. The analytical models for transmission through a dispersive medium are confirmed by simulations. It is found that chromatic dispersion has little impact on the bit error rate performance when a narrow-linewidth laser and a noise management technique are employed.
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