Abstract
In this paper, we propose a constant envelop minimum-shift keying orthogonal
frequency division multiplexing (CE-MSK-OFDM) modulation scheme. This scheme
can mitigate the inherent drawbacks of CE quadrature phase shift keying OFDM
(CE-QPSK-OFDM) and MSK-OFDM. Advantages of the proposed CE-MSK-OFDM modulation
scheme are theoretically investigated. A CE-MSK-OFDM coherent optical experimental
system is presented. In our experiment, 2.5 Gb/s CE-MSK-OFDM signal and 2.5
Gb/s CE-QPSK-OFDM signal are transmitted over a 100 km standard single mode
fiber (SSMF) without phase compensation to check its advantages in mitigating
intercarrier interference (ICI). In addition, performance under large fiber
launch power is also measured to check its advantages in counteracting fiber
nonlinear impairments. The experimental results show that the proposed system
performs well in decreasing ICI and peak-to-average power ratio (PAPR) as
the theoretical analysis reveals.
© 2012 IEEE
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