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2007•Journal of Nanjing University of Posts and TelecommunicationsRequires access

Research on the Unavailability of the Smart Antenna in the TD-SCDMA Standard

Lu Xia

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Abstract

Many TD-SCDMA standard researchers believe that the features of TDD mode characterised as a Walking Mobile Communication System can be overcome via the Smart Antenna core technology.Based on the directionally-launching pattern of the Smart Antenna,this paper proves that the CDMA system self-interference produced by users from different direction will be introduced while using the Smart Antenna in the CDMA system.Therefore the effective directionally-launching-gain of the Smart Antenna will come to zero and the desired objective of isolating multi-user interference via space division multiple access can't be realised either.Additionally,it proves the unavailability of the Smart Antenna in the TD-SCDMA standard in several other ways,such as the TD-SCDMA system features,the possibility of forming multiple-direction beam by the Smart Antenna in the same time,and the rationality of the directional line array Smart Antenna.

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What this paper is about

Many TD-SCDMA standard researchers believe that the features of TDD mode characterised as a Walking Mobile Communication System can be overcome via the Smart Antenna core technology.Based on the directionally-launching pattern of the Smart Antenna,this paper proves that the CDMA system self-interference produced by users from different direction will be introduced while using the Smart Antenna in the CDMA system.Therefore the effective directionally-launching-gain of the Smart Antenna will come to zero and the desired objective of isolating multi-user interference via space division multiple access can't be realised either.Additionally,it proves the unavailability of the Smart Antenna in the TD-SCDMA standard in several other ways,such as the TD-SCDMA system features,the possibility of forming multiple-direction beam by the Smart Antenna in the same time,and the rationality of the directional line array Smart Antenna.

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Available abstract

Many TD-SCDMA standard researchers believe that the features of TDD mode characterised as a Walking Mobile Communication System can be overcome via the Smart Antenna core technology.Based on the directionally-launching pattern of the Smart Antenna,this paper proves that the CDMA system self-interference produced by users from different direction will be introduced while using the Smart Antenna in the CDMA system.Therefore the effective directionally-launching-gain of the Smart Antenna will come to zero and the desired objective of isolating multi-user interference via space division multiple access can't be realised either.Additionally,it proves the unavailability of the Smart Antenna in the TD-SCDMA standard in several other ways,such as the TD-SCDMA system features,the possibility of forming multiple-direction beam by the Smart Antenna in the same time,and the rationality of the directional line array Smart Antenna.

Key concepts: Smart antenna, Unavailability, Antenna (radio), Space-division multiple access, Omnidirectional antenna, Reconfigurable antenna, Code division multiple access, Computer science

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