研究目的
Investigating the feasibility of aircraft positioning using the signal delay profile of ISDB-T, a type of digital terrestrial television broadcasting (DTTB) used in Japan, as an alternative to conventional primary surveillance radar (PSR).
研究成果
The experimental results demonstrate that the ISDB-T signal delays can be effectively used for aircraft positioning, offering a higher update rate compared to conventional PSR. The proposed system shows potential as a useful tool for estimating aircraft positions, with future work aimed at expanding the system to multistatic-type radar and improving accuracy.
研究不足
The positional accuracy of the estimated target positions was not taken into account. The study suggests comparing the estimated positions with other surveillance data like secondary surveillance radar (SSR) and automatic-dependent surveillance–broadcasting (ADS-B) for future work.
1：Experimental Design and Method Selection:
The study utilizes passive bistatic radar (PBR) principles with ISDB-T signals for aircraft positioning. The method leverages the guard interval (GI) characteristic of ISDB-T for detecting delayed signals caused by aircraft.
2：Sample Selection and Data Sources:
The experiment was conducted near Tokyo International Airport using high-power signals from TOKYO SKYTREE.
3：List of Experimental Equipment and Materials:
A COTS Yagi antenna with 30 elements and a signal analyzer 'Keysight Technology N9010A with software N6155A' were used.
4：Experimental Procedures and Operational Workflow:
The experiment involved receiving incident and scattered waves by aircraft using the Yagi antenna, detecting signals, and computing signal delays to estimate aircraft positions.
5：Data Analysis Methods:
The delay profiles were analyzed to estimate the distance from the receiver to the target using bistatic ranging principles.
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