無線感測器網路之定位晶片研製及系統開發
Development of Location Identification ASIC and system in Wireless Sensor Network
Date Issued
2007
Date
2007
Author(s)
Choi, Iok-Kan
DOI
zh-TW
Abstract
The main thrust of this dissertation is to develop the Application Specific Integrated Circuit (ASIC) of location identification for Wireless Sensor Network (WSN) and to analyze the capability of location identification in existing hardware. Beside, this thesis will discuss a number of the location identification methods, such as TDOA, TOA and AOA, etc. By utilizing the time interval of propagating signal as my basic location identification parameter, this thesis examines the suitable location identification methodology based on the Wireless Sensor Network configuration developed within NTU. Some preliminary tests were performed to verify the performance of the newly developed system.
To implement Wireless Sensor Network in a System On Chip configuration, this thesis utilizes the digital concept of the classical Nutt method to measure the time interval of propagating signal. This newly designed ASIC was then fabricated by the .35um CMOS process of TSMC. The location identification ASIC has smaller size than that of the design based on analog method and was found to have resolution better than 1 meter when operating the clock at minimum 50MHz. The location identification ASIC is expected to be integrated further with the RF transceiver and micro-controller on a chip in the future.
Finally, the performance of the newly developed location identification ASIC was verified by integrating it with existing RF transceiver and micro-controller to serve as the testbed. Control code for the micro-controller was developed to access the measurement result obtained, which was transmitted to the control center by using serial RS232 interface. Because the location identification method developed within the Wireless Sensor Network can overcome most of the hardware delay, the error of time interval was significantly reduced.
Subjects
定位晶片
多重路徑
抵達時間
抵達時間差
訊路強度測距
抵達角度
Location Identification ASIC
multi-path
Time of Arrival
Time Difference of Arrival
Signal Strength Ranging
Angle of Arrival
Type
thesis
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