Abstract
The performance of orthogonal frequency-division multiplexing (OFDM) and single-carrier (SC) fiber-optic transmission systems with digital backward propagation (DBP) are compared. Sixteen quadrature amplitude modulation (QAM) is used for both systems with the bit rate of 100 Gb/s. The results show that OFDM and SC with Nyquist pulses (SC-Nyquist) have a superior performance as compared to SC with raised-cosine pulses (SC-NRZ) when the DBP is used. We also studied the impact of electrical filter bandwidth and nonlinear phase/amplitude noise on the performance. As the filter bandwidth increases, the performance improves for the case of ideal BP for both OFDM and SC systems when the signal-to-noise ratio (SNR) is large. The analysis of nonlinear phase/amplitude noise revealed that it causes significant impairments for SC-NRZ systems and less impact on OFDM and SC-Nyquist systems, which explains the performance advantage of OFDM/SC-Nyquist over SC-NRZ when the DBP is used.
Original language | English |
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Pages (from-to) | 84-90 |
Number of pages | 7 |
Journal | Optical Fiber Technology |
Volume | 17 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2011 Jan |
Keywords
- Digital backward propagation
- Fiber-optic transmission
- OFDM
- Single-carrier
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Control and Systems Engineering
- Atomic and Molecular Physics, and Optics
- Instrumentation
- Electrical and Electronic Engineering