TSUNAMI II active calibration system

CM Simmonds; MA Beach

TSUNAMI II active calibration system

CM Simmonds, MA Beach

Research output: Working paper › Working paper and Preprints

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Abstract

The TSUNAMI II project is an investigation into the use of adaptive antenna technology for use in future generation mobile communications systems. The aims of the project are to study the complexity versus increase in system capacity and coverage extension over the existing, non-adaptive networks. It is expected that TSUNAMI II will produce results indicating a significant capacity increase ove the existing, non-adaptive GSM network, through the use of spatial diversity. However, the adaptive system relies on the accurate transfer of signal phase and amplitude from the baseband beamformer to the antenna array patches. From previous investigations it is known that environmental effects (eg changes in temperature) can alter the electrical characteristics of both the active and passive components in the transmission and reception paths, thus disrupting the beam patterns and hence degrading the beamformer performance. The active calibration system is designed to null these effects through periodic measurement of the signal distortions and allow sympathetic adjustment to the required beamformer parameters at the base station

Original language	English
Pages	3.32 - 3.39
Publication status	Published - Dec 1997

Bibliographical note

Additional information: A paper presented to the 2nd Management Committee and Working Group Meeting of COST 260 : Smart Antenna Design and Technology : Session 3: RF Radiators, Circuits and Components / IF and Baseband Technology, held in Dubrovnik, Croatia, December 11-12, 1997

Sponsorship: The Tsunami II project is set up under the EU ACTS research programme

Contributor: European Cooperation in the Field of Scientific and Technical Research (EURO-COST)

Keywords

adaptive antenna

Access to Document

Simmonds p36 Dec1997Accepted author manuscript, 2.37 MB

http://hdl.handle.net/1983/852

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abstract = "The TSUNAMI II project is an investigation into the use of adaptive antenna technology for use in future generation mobile communications systems. The aims of the project are to study the complexity versus increase in system capacity and coverage extension over the existing, non-adaptive networks. It is expected that TSUNAMI II will produce results indicating a significant capacity increase ove the existing, non-adaptive GSM network, through the use of spatial diversity. However, the adaptive system relies on the accurate transfer of signal phase and amplitude from the baseband beamformer to the antenna array patches. From previous investigations it is known that environmental effects (eg changes in temperature) can alter the electrical characteristics of both the active and passive components in the transmission and reception paths, thus disrupting the beam patterns and hence degrading the beamformer performance. The active calibration system is designed to null these effects through periodic measurement of the signal distortions and allow sympathetic adjustment to the required beamformer parameters at the base station",

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author = "CM Simmonds and MA Beach",

note = "Additional information: A paper presented to the 2nd Management Committee and Working Group Meeting of COST 260 : Smart Antenna Design and Technology : Session 3: RF Radiators, Circuits and Components / IF and Baseband Technology, held in Dubrovnik, Croatia, December 11-12, 1997 Sponsorship: The Tsunami II project is set up under the EU ACTS research programme Contributor: European Cooperation in the Field of Scientific and Technical Research (EURO-COST)",

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N2 - The TSUNAMI II project is an investigation into the use of adaptive antenna technology for use in future generation mobile communications systems. The aims of the project are to study the complexity versus increase in system capacity and coverage extension over the existing, non-adaptive networks. It is expected that TSUNAMI II will produce results indicating a significant capacity increase ove the existing, non-adaptive GSM network, through the use of spatial diversity. However, the adaptive system relies on the accurate transfer of signal phase and amplitude from the baseband beamformer to the antenna array patches. From previous investigations it is known that environmental effects (eg changes in temperature) can alter the electrical characteristics of both the active and passive components in the transmission and reception paths, thus disrupting the beam patterns and hence degrading the beamformer performance. The active calibration system is designed to null these effects through periodic measurement of the signal distortions and allow sympathetic adjustment to the required beamformer parameters at the base station

AB - The TSUNAMI II project is an investigation into the use of adaptive antenna technology for use in future generation mobile communications systems. The aims of the project are to study the complexity versus increase in system capacity and coverage extension over the existing, non-adaptive networks. It is expected that TSUNAMI II will produce results indicating a significant capacity increase ove the existing, non-adaptive GSM network, through the use of spatial diversity. However, the adaptive system relies on the accurate transfer of signal phase and amplitude from the baseband beamformer to the antenna array patches. From previous investigations it is known that environmental effects (eg changes in temperature) can alter the electrical characteristics of both the active and passive components in the transmission and reception paths, thus disrupting the beam patterns and hence degrading the beamformer performance. The active calibration system is designed to null these effects through periodic measurement of the signal distortions and allow sympathetic adjustment to the required beamformer parameters at the base station

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