Performance comparisons of external modulated hybrid analog-digital signals in electrical and optical domains

A multipurpose network which integrates the functionalities of single radio channel and baseband data distribution has been proposed recently. In this letter, we further propose and compare two possible combination schemes which combine multiple radio channel and single digital baseband data in elec...

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Bibliographic Details
Published in:IEEE photonics technology letters 2005-11, Vol.17 (11), p.2496-2498
Main Authors: Peng, Wei-Ren, Peng, Peng-Chun, Hsueh, Yu-Ting, Feng, Kai-Ming, Chi, Sien
Format: Article
Language:English
Subjects:
Baseband
Carrier-to-noise and distortion ratio (CNDR)
Channels
Costs
Digital
Digital modulation
Distortion
High speed optical techniques
hybrid analog-digital transmission
Linearity
Links
Mach-Zehnder modulator (MZM)
Millimeter wave communication
Modulation
Networks
Optical distortion
Optical fiber cables
Optical filters
Optical modulation
Optimization
Radio
radio-over-fiber (RoF)
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Summary:A multipurpose network which integrates the functionalities of single radio channel and baseband data distribution has been proposed recently. In this letter, we further propose and compare two possible combination schemes which combine multiple radio channel and single digital baseband data in electrical and optical domains. Linearity of multiple radio channels and performance of digital baseband data are studied in this externally modulated hybrid analog-digital link. It is found that signals combined in the optical domain, while with higher cost, will outperform that in the electrical domain on the carrier-to-noise and distortion ratio. In addition, the baseband data performance is also improved with optical combining scheme since the optimum required modulation index is lower.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2005.858152