物聯網無線電波功率延遲模型之建立與驗證-應用於冷鏈物流恆溫箱之連網

郭育源

doi:10.6842/NCTU.2013.00583

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物聯網無線電波功率延遲模型之建立與驗證-應用於冷鏈物流恆溫箱之連網

Radio Channel Power Delay Profile Modeling and Verification for IOT-Applied to the Sensor Networking of Thermostatic Containers in Cold Chain Logistics

郭育源 , Masters　　Advisor：唐震寰　　

繁體中文 DOI： 10.6842/NCTU.2013.00583

物聯網；冷鏈物流；電波通道；功率延遲模型； IOT ； Cold Chain Logistics ； Radio Channel ； Power Delay Profile Modeling

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The Internet of things(IOT) is sending the information of objects to a platform by combining radio identification technology and wireless sensor network. The freezer is a metal cabinet in cold chain logistics, and there are many more containers inside the cabinet. Applying wireless sensor network to containers and sending information of containers are exactly the internet of things.
  But when the information of containers sent by radio wave which propagating in a metal environment, there is strongly multipath effect. And the radio wave may scattered or absorbed by the container. Hence, multipath effect may interfere the transmitted signal. For this reason, we need to model and verify for the power delay profile. However, it seems no one had studied this issue before.
  we use two approach to model PDP. One is deterministic approach, which combines image method and gating to model PDP. The other is statistical approach which comprises Poisson model and Δ-K model to model PDP. Finally, Δ-K model is suitable for modeling, and its parameter K is between 0.66 to 0.77. That means there is low correlation between multipath.

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[2] T. S. Rappaport, Wireless Communications: Principles and Practice, 2nd ed. Prentice Hall, 2002
連結：
[3] Asplund, H.; Molisch, A.F.; Steinbauer, M.; Mehta, N.B., "Clustering of scatterers in mobile radio channels-evaluation and modeling in the COST259 directional channel model," Communications, 2002. ICC 2002. IEEE International Conference on , vol.2, no., pp.901,905 vol.2, 2002
連結：
[4] Foerster, J.R., "The effects of multipath interference on the performance of UWB systems in an indoor wireless channel," Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd , vol.2, no., pp.1176,1180 vol.2, 2001
連結：
[5] Tanaka, T., "A study on multipath propagation characteristics for RAKE receiving technique," Personal, Indoor and Mobile Radio Communications, 1994. Wireless Networks - Catching the Mobile Future., 5th IEEE International Symposium on , vol., no., pp.711,714 vol.2, 18-23 Sep 1994
連結：
[6] Hashemi, H., "The indoor radio propagation channel," Proceedings of the IEEE , vol.81, no.7, pp.943,968, Jul 1993
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