Naruto Yonemoto

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A collision avoidance and warning system for civil helicopters in Japan has been developed. A real-time warning method was applied using an image fused from a coloured video, an IR sensor data and mm-wave radar measurements. This paper focuses on the FM-CW mm-wave radar sensor and the associated antennas, working at 94 GHz. Flight tests were conducted in(More)
A new high-speed aeronautical digital airport communication system called AeroMACS (Aeronautical Mobile Airport Communication System) is currently being considered. We experimentally evaluate AeroMACS signals from transmitting system on a tower to receiving system on a bus. We measure RSSI (Received Signal Strength Indicator) and RCE (Relative Constellation(More)
A new aeronautical airport communication system called Aeronautical Mobile Airport Communications System (AeroMACS) is under standardizing. This paper reports performance evaluation of an AeroMACS prototype system on airport environment. First, we show that RSSI is the most important factor for airport condition. Second, we estimate coverage of the system.(More)
A new high-speed aeronautical digital communication system called Aeronautical Mobile Airport Communication System (AeroMACS) is currently being considered. This paper describes a study to evaluate the MIMO effect of different antenna configurations for this system in an airport environment. We first proposed an index to evaluate MIMO antenna systems. We(More)
The carbon fiber reinforced plastic (CFRP) materials for the millimeter-wave antenna application are experimentally evaluated. First, the polarization characteristics of the fundamental unidirectional CFRP laminates are measured at W-band. The measured transmission characteristics show that the significant difference depends on the polarization of the(More)
Aeronautical Mobile Airport Communications System (AeroMACS) is being standardized in order to provide new broadband wireless communications on airport surface. AeroMACS will be used for voice-based Air Traffic Control (ATC) services in the future as it is recommended in standards and recommended practices (SARPs) of the International Civil Aviation(More)
AeroMACS (Aeronautical Mobile Airport Communication System) is proposed for future airport surface communication system in the C band. In this paper, we report the results of an experiment at Sendai airport in Japan to evaluate the AeroMACS. Our base station covers the approximately 3km×1km rectangular airport surface with a transmitter power of 1W.(More)
In this paper, we study the performance of VoIP over WiMAX systems. We assume a two-path model for airport surface communications and experiment by using a multipath fading simulator. We evaluate the R-factor when the mobile speed and delay time are changed. We use an R-factor of 80 which is defined in ED-136 as a threshold where VoIP can be used for air(More)
Debris on the airport surface may cause severe damage to aircraft. To detect these obstacles, foreign object debris (FOD) detection systems have been developed recently. By utilizing high-sensibility and weather robustness characteristics, the millimeter-wave radar is an essential sensor device for these systems. This paper discusses an offset parabolic(More)