As functional integration has increased in hand-held consumer devices features such as Global Positioning System (GPS) receivers have been embedded in increasingly more devices in recent years. For example, the train positioning system based on GPS provides an integrated positioning solution which can be used in many rail applications without a cost intensive infrastructure. The network built i...

Shinji Saitoh is a researcher at Electronic Navigation Research Institute (ENRI), independent administrative institution (IAI). He received M. Eng. in Electronic Engineering from the University of ElectroCommunications (UEC) in 1998. He joined ENRI, the Ministry of Transport (MOT) in 1998. Currently, he is researching in the area of GPS and GBAS. He belongs to GBAS research group in ENRI. He is...

This paper concerns power allocation in relay-assisted wireless channels for two-hop transmission. First, the transmitter sends the information to both the relay and receiver parts. Next, in the second hop, the transmitter cooperates with the relay to increase the received signal to noise ratio (SNR), assuming the relay makes use of the Amplify and Forward (AF) strategy. Moreover, it is assumed...

This paper presents a data focusing method (DFM) to image extended targets using the multiple signal classification (MUSIC) algorithm. The restriction on the number of transmitter-receiver antennas in a microwave imaging system deteriorates profiling an extended target that comprises many point scatterers. Under such situation, the subspace-based linear inverse scattering methods, like the MUSI...