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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/28446

Title: Downlink Power Control in Multi-Code CDMA Mobile Medicine System
Authors: Chin-Feng Lin;Wen-Thong Chang;Hsin-Wang Lee;Shih-Ii Hung
Contributors: NTOU:Department of Electrical Engineering
國立臺灣海洋大學:電機工程學系
Keywords: Multi-code CDMA;Downlink power control;Mobile medicine;ECG signal
Date: 2006-05
Issue Date: 2011-10-21T02:37:36Z
Publisher: Medical and Biological Engineering and Computing
Abstract: Abstract:In this paper, we propose a downlink power-control mechanism to be applied in a multi-code code division multiple access (CDMA) mobile medicine system. The mobile medicine system can provide (i) measured blood pressure and body temperature, (ii) medical signals measured by the electrocardiogram (ECG) device, (iii) mobile patient's history, (iv) G. 729 audio signals, (v) Joint Photographic Experts Group 2000 Medical images and Moving Picture Experts Group 4 charge-coupled device sensor video signals. By utilizing a multi-code CDMA spread spectrum communication system with downlink power-control strategy, it is possible for this system to meet the quality of service requirements of a mobile medicine network. In addition, such a system can maximize the resource utilization. For different messages to be sent, the power is controlled according to the requisite bit error rate (BER). Higher transmission power is given to the media with lower BER requirement. Numerical analysis shows that the ratios of transmission power for voice, video, and data virtual channels is approximately 1: 2: 13 when the BERs for voice, video, and data are 10 boolean AND(- 3), 10 boolean AND(- 4), and 10 boolean AND(- 7), respectively. This power ratio is similar to the ratio of signal-to-noise plus interference power ratio for voice, video, and data during transmission. For the purpose of verifying the proposed argument, a simulation has been done and the results match the derivation very well.
Relation: 44(5), pp.437-444
URI: http://ntour.ntou.edu.tw/handle/987654321/28446
Appears in Collections:[電機工程學系] 期刊論文

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