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— Research and development of technologies supporting subscriber location identification has rapidly increased around the world. A technology demonstrator was developed for wireless location estimation in IS-95 CDMA wireless cellular systems. Field measurements were used to evaluate the performance of the developed technology demonstrator. Interim results,(More)
A new approach of ionosphere recovery has been developed and described in this thesis using a regional area GPS network. The approach focuses on recovering ionosphere vertical TEC at centimetre accuracy using carrier phase as the principal observable. To eliminate possible satellite and receiver dependent biases, a double difference method has been employed(More)
The purpose of this study is to investigate the cloud computing service security and access, by taking into account the service provider, and the customer's concerns. New trends of challenges from the two types of concerns are identified based on literature review. Especially, strategies to deal with the challenges in the mobile environment are proposed. It(More)
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