A radio-over-fiber network for microcellular system application
- 1 January 1998
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Vehicular Technology
- Vol. 47 (1), 84-94
- https://doi.org/10.1109/25.661035
Abstract
This paper investigates the feasibility of a radio-over-fiber network, which employs a single high-power Nd:YAG laser shared among many microcells. External amplitude modulators are employed at both base station (BS) and radio ports (RPs) to form an optical fiber distribution network. The distortions induced by the uplink remodulation are analyzed. The optimal preamplifier gain in the uplink is estimated for given sensitivity and dynamic range (DR). Appropriate modulator linearization and thermal-noise suppression schemes are utilized together to improve the DR. The clipping distortion for the predistortion-linearized modulator is also considered. The result shows that the effects of clipping and higher order distortions have little impact on the estimation of the system performance. A numerical example shows that a 100-mW Nd:YAG laser can provide for a macrocell of 5-km radius up to 16 microcells and 1600 channels when a 20-dB modulator linearization and 10-dB thermal-noise suppression are employed. The experiment setup uses a two-tone test to verify the theoretical calculation. The measurement agrees with the theoretical estimation very wellKeywords
This publication has 20 references indexed in Scilit:
- On the overmodulation limit in externally modulated lightwave AM-VSB CATV systemsIEEE Photonics Technology Letters, 1996
- A fiber distribution system for microcellular radioIEEE Photonics Technology Letters, 1994
- Polarization-independent Mach-Zehnder interferometer on III-V semiconductorsIEEE Photonics Technology Letters, 1993
- Increased linear dynamic range by low biasing the Mach-Zehnder modulatorIEEE Photonics Technology Letters, 1993
- Progress in externally modulated AM CATV transmission systemsJournal of Lightwave Technology, 1993
- Implementation and evaluation of a dual parallel linearization system for AM-SCM video transmissionJournal of Lightwave Technology, 1993
- Fast automatic polarization control systemIEEE Photonics Technology Letters, 1992
- An electrooptic intensity modulator with improved linearityIEEE Photonics Technology Letters, 1991
- Multichannel coherent FSK experiments using subcarrier multiplexing techniquesJournal of Lightwave Technology, 1990
- High-performance optical analog link using external modulatorIEEE Photonics Technology Letters, 1989