The effect of higher receiver sensitivity on the coverage of a spread spectrum CDMA system

We examine the effect of higher receiver sensitivity on coverage of a code division multiple access (CDMA) cellular system. The reduced system noise figure of a base station is achieved by placing low noise amplifier (LNA) between receive antenna and base station radio. Using noise figure theory, we...

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Veröffentlicht in:IEEE microwave and wireless components letters 2005-05, Vol.15 (5), p.372-374
Hauptverfasser: Yang, S.C., Payne, J., Salkola, M.I.
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creator Yang, S.C.
Payne, J.
Salkola, M.I.
description We examine the effect of higher receiver sensitivity on coverage of a code division multiple access (CDMA) cellular system. The reduced system noise figure of a base station is achieved by placing low noise amplifier (LNA) between receive antenna and base station radio. Using noise figure theory, we develop an analytical model of sensitivity improvement which is a function of reverse-link noise rise and antenna noise temperature. Since CDMA has reverse power control, sensitivity improvement is manifested in the reduction of mobile transmit power. Field experiments are performed and data collected to test the model. The positive result shows that LNA can be used to reduce mobile transmit power and their loading on adjacent cells.
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The reduced system noise figure of a base station is achieved by placing low noise amplifier (LNA) between receive antenna and base station radio. Using noise figure theory, we develop an analytical model of sensitivity improvement which is a function of reverse-link noise rise and antenna noise temperature. Since CDMA has reverse power control, sensitivity improvement is manifested in the reduction of mobile transmit power. Field experiments are performed and data collected to test the model. 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identifier ISSN: 1531-1309
ispartof IEEE microwave and wireless components letters, 2005-05, Vol.15 (5), p.372-374
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language eng
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source IEEE Electronic Library (IEL)
subjects Amplifiers
Analytical models
Antenna theory
Antennas
Applied sciences
Base stations
Circuit properties
Code division multiple access (CDMA)
coverage
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Equipments and installations
Exact sciences and technology
low noise amplifier (LNA)
Low-noise amplifiers
Mobile radiocommunication systems
Multiaccess communication
Noise figure
Noise reduction
Radiocommunications
Receivers
Receiving antennas
Spread spectrum communication
spread spectrum systems
Telecommunications
Telecommunications and information theory
Transmitters. Receivers
title The effect of higher receiver sensitivity on the coverage of a spread spectrum CDMA system
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