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Cell planning scheme for WCDMA systems using genetic algorithm and measured background noise floor

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5 Author(s)
H. -P. Lin ; Inst. of Comput., Nat. Taipei Univ. of Technol., Taiwan ; R. -T. Juang ; D. -B. Lin ; C. -Y. Ke
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WCDMA is an interference-limited system and its coverage and data throughput are sensitive to background noise. The results of background noise measurements in urban Taipei city for the licence bands of 3G systems issued in Taiwan are presented. The measurements involve FDD mode uplink and downlink frequency bands measured on building tops and at street level, respectively. The severeness of spectrum pollution of these bands is evaluated by extracting three statistical parameters from the measurement data, and the impact of the background noise on coverage and throughput is analysed for WCDMA systems. Also, based on measurement results, a better solution using a genetic algorithm with the help of a propagation model and digitised building information is proposed for the deployment of the base stations of WCDMA systems, by which the required coverage can be met with a suitable number of base stations, locations, antenna heights and transmitting power. A system is obtained that suffers less impact from background noise and achieves a higher data throughput with minimum cost.

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IEE Proceedings - Communications  (Volume:151 ,  Issue: 6 )