Fiber-optic microcell radio systems with a spectrum delivery scheme

Author

Ohmoto, Ryutaro ; Ohtsuka, Hiroyuki ; Ichikawa, Hirofumi

Author_Institution

NTT Radio Commun. Syst. Lab., Kanagawa, Japan

Volume

11

Issue

7

fYear

1993

fDate

9/1/1993 12:00:00 AM

Firstpage

1108

Lastpage

1117

Abstract

The authors examine microcell radio systems that use subcarrier transmission and spectrum delivery switch (SDS) techniques to meet traffic demands for a large number of portable phones. Radio signals are transmitted over fibre between base stations (BS) and a central station (CS). Relationships between blocking probability and offered traffic are described as a parameter of SDS ports. Optical link performances, such as link gain and carrier-to-noise ratio (CNR), are presented. Moreover, it is found that using FM techniques can improve the dynamic range by 20 dB compared to conventional methods for the uplink from BS to CS. The proposed technique can also increase the number of transmittable carriers compared to conventional methods for the downlink from CS to BS. This network strategy results in more flexible transmission

Keywords

cellular radio; frequency modulation; optical communication equipment; optical links; phase shift keying; subcarrier multiplexing; subscriber loops; FM techniques; QPSK signals; base stations; blocking probability; carrier-to-noise ratio; central station; fibre optic link; link gain; microcell radio systems; offered traffic; portable phones; spectrum delivery switch; subcarrier transmission; Bit error rate; Costs; Demodulation; Dynamic range; Microcell networks; Optical fiber communication; Optical fibers; Optical switches; Quadrature phase shift keying; Telephony;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.233223

Filename

233223