NDLI: Optical SCM transmission multiplexing IF and local signals for adaptive array

Content Provider	IEEE Xplore Digital Library
Author	Shibata, O. Seto, I. Obayashi, S. Shoki, H.
Copyright Year	2001
Description	Author affiliation: Corporate Res. & Dev. Center, Toshiba Corp., Kawasaki, Japan (Shibata, O.)
Abstract	There has been much interest in the application of adaptive array antennas to wireless communication systems. To keep base station (BS) requirements simple, it is advantageous to separate the array antenna in a BS from a signal processing unit in a central station (CS) and link them by optical fiber. Several approaches have been proposed. In these approaches, due to ambient temperature changes, phase differences among antenna branches cannot be kept constant between a CS and a BS so that the antenna radiation pattern changes. We introduce a new configuration for optical subcarrier multiplexing (SCM) radio-on-fiber (ROF) transmission, which can avoid the above difficulties. In this system, the SCM signal comprises all antenna branch signals and all local signals for original frequency conversions. While the proposed system is simple, the phase difference among antenna branches can be maintained to be constant in spite of fiber length fluctuation. Furthermore, only a pair of optical transceivers and optical fibers for downstream and upstream lines is required between a CS and a BS. We show the results of several experimental investigations.
Starting Page	218
Ending Page	221
File Size	208299
Page Count	4
File Format	PDF
ISBN	0780370708
DOI	10.1109/APS.2001.960071
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-07-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency conversion Optical signal processing Optical fibers Adaptive arrays Antenna arrays Optical arrays Wireless communication Base stations Adaptive signal processing Array signal processing
Content Type	Text
Resource Type	Article

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