Journal ArticleDOI
Coherent fiber-optic microcellular radio communication system using a novel RF-to-optic conversion scheme
TLDR
The theoretical analysis and computer simulation of transmission performances of radio QPSK and QAM signals clarify that the proposed system is superior to the fiber-optic radio communication system using conventional coherent analog optical links.Abstract:
In this system a radio signal is converted into an optical signal with the same modulation format coherently transmitted through a wide-band optical fiber without any baseband demodulation and modulation. The theoretical analysis and computer simulation of transmission performances of radio QPSK and QAM signals clarify that the proposed system is superior to the fiber-optic radio communication system using conventional coherent analog optical links. >read more
Citations
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Patent
Wavelength division multiplexing system
TL;DR: In this paper, the authors proposed an analog light-wave communication system consisting of at least two optical transmitters for providing optical information signals at different optical wavelengths, and a fiber optic transmission system coupled to the output of the dense wavelength division multiplexer receives the composite optical signal.
Journal ArticleDOI
PER and EVM measurements of a radio-over-fiber network for cellular and WLAN system applications
TL;DR: In this paper, the transmission characteristics of an optical signal that is modulated by a radio-frequency signal using an electroabsorption modulator (EAM) were investigated at cellular bands of 900 MHz, 1.8 GHz, 1 9 GHz, and 2.1 GHz and at ISM bands of 2.4 GHz and 5.8GHz for wireless local area network and intelligent transportation systems applications.
Patent
Linear multi-output optical transmitter system
TL;DR: In this paper, a high fidelity, multi-output optical transmission system is configured utilizing a high power continuous wave YAG laser, multiport splitters, and linearized external modulation.
Journal ArticleDOI
Loop-Back Optical Heterodyne Technique for 1.0-Gb/s Data Transmission Over 60-GHz Radio-On-Fiber Uplink
TL;DR: In this article, an optical-heterodyne-detection method for a 60 GHz radio-on-fiber uplink is proposed and verified in a 1.0-Gb/s transmission experiment over 10 km of singlemode fiber, which represents access-network transmission.
Technical trends in millimeter-wave band Radio-On-Fiber access system
TL;DR: In this paper, a 60 GHz band radio on fiber (ROF) access system is proposed based on an optical heterodyne technique for a 60GHz band access system, which realizes a su-cient optical link budget with a simple system conflguration.
References
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Journal ArticleDOI
Millimeter-wave fiber optics systems for personal radio communication
H. Ogawa,D. Polifko,S. Banba +2 more
TL;DR: In this paper, the advantages of the millimeter-wave band usage for personal communication systems are briefly described and several fiber-optic link architectures, including one using a combination of direct laser modulation and indirect (external) optical modulation, are outlined with respect to signal transmission at millimeterwave frequencies.
Journal ArticleDOI
Local-oscillator excess-noise suppression for homodyne and heterodyne detection.
TL;DR: Calculation of the signal-to-noise density ratio for a homodyne/heterodyne receiver utilizing two detectors show that excess intensity noise in the local oscillator can be canceled and need not degrade the performance of the receiver.
Journal ArticleDOI
'Fibre/radio' for the provision of cordless/mobile telephony services in the access network
TL;DR: In this article, a four channel CT2/radio system was demonstrated over singlemode fiber using subcarrier multiplexing techniques, achieving a spurious free electrical dynamic range of 51 dB, which is sufficient for a mobile range of approximately 100 m.
Journal ArticleDOI
A dual-detector optical heterodyne receiver for local oscillator noise suppression
TL;DR: In this paper, the performance of a dual-detector optical heterodyne receiver was analyzed and compared with that of a conventional singledetector HetNOMA receiver.
Journal ArticleDOI
High-capacity coherent lightwave systems
R.A. Linke,Alan H. Gnauck +1 more
TL;DR: The most significant obstacles to the attainment of quantum-noise limited detection at higher speeds are seen to be the requirement of uniform frequency response from electronic components and the local oscillator laser power requirement, which increases as the square of the bit rate.