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Analog Predistortion Technique in Remodulation based Radio over High-speed Access Network for Improving Sensitivity
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- Authors
- Seung Hyun Jang, Bong Hyuk Park, Jae-Ho Jung
- Issue Date
- 2011-10
- Citation
- International Topical Meeting on Microwave Photonics (MWP) / Asia-Pacific Microwave Photonics Conference (APMP) 2011, pp.339-342
- Language
- English
- Type
- Conference Paper
- Abstract
- We demonstrate an RSOA-based WDM-PON using a spectrally distorted 622-Mbps Sub-carrier Multiplexing (SCM) signal at 1200-MHz for downstream and a 622-Mbps Non Return to Zero (NRZ) signal for upstream. Even though the overall transmission bandwidth for the SCM signal with transceivers originally for 1.25-Gbps is only 810-MHz, a clear eye opening can be obtained using a spectral predistortion technique to compensate the signal quality deterioration above 810-MHz. With the predistorter, downstream signal sensitivity is improved up to 1.4-dB, leading to a wider range of the optical modulation index of the downstream SCM signal. © 2011 IEEE.
- KSP Keywords
- Analog predistortion technique, High Speed, Modulation Index, Optical modulation, Signal quality, Wavelength-division-multiplexing passive optical network(WDMPON), access network, eye opening, nonreturn-to-zero(NRZ), quality deterioration, return-to-zero(RZ)