Feasibility of Spectrum Sharing Between Fixed and Mobile RadioSystems

  • Authors:

  • P. J. Marshall;M. Shafi;K. W. Sowerby

  • Affiliations:

  • Telecom Corporation of New Zealand Ltd., P.O. Box 550, Wellington, New Zealand E-mail: phil.marshall@telecom.co.nz;Telecom Corporation of New Zealand Ltd., P.O. Box 550, Wellington, New Zealand E-mail: phil.marshall@telecom.co.nz;Department of Electrical and Electronic Engineering, The University of Auckland, Private Bag 92019, Auckland, New Zealand E-mail: kw.sowerby@auckland.ac.nz

  • Venue:
  • Wireless Personal Communications: An International Journal
  • Year:
  • 1999

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Abstract

General techniques are presented to investigatethe feasibility of spectrum sharing between aDS-CDMA mobile radio system and a fixedpoint-to-point microwave link. The limitationsof a spectrum sharing arrangement are identifiedfor specific system parameters. Initial resultsindicate that, for the systems considered,spectrum sharing will be difficult to implementin many environments and that the spectrumsharing arrangement is limited by the mobileradio system performance, in particular thereverse mobile link. However it is shown thatthe coordination requirements of the two systemsconverge when the mobile transmission power isincreased. When excision suppression is used toremove fixed service interference at a mobilereceiver, it may have an adverse effect on themobile system performance due to a degradationin the correlation characteristics of thereceived signal. The degradation in the receivedsignal depends on the width and centre frequencyof the excised interference relative to themobile signal.