Tomoya Yamaoka

Radar video generated from Synthetic Aperture Radar image

Synthetic Aperture Radar (SAR) can take a fine radar image without relation to sunshine condition. Recently, video generated from SAR is discussed. The radar video offers the practical understanding of the target motion without the added implement. The radar video is often generated from raw data in spotlight mode. In contrast, we propose the radar video generated from SAR image. The proposed scheme provides a low complexity and the freedom of the observation mode. In the paper, we show the process of the proposed scheme and indicate the snapshot image of radar video made of our air-borne stripmap SAR data or Advanced Land Observing Satellite-2 data. The images show possibility of the radar video with stripmap mode or space-borne SAR.

A display method allocating SAR image and ATI phase map to value and saturation, respectively

Synthetic Aperture Radar (SAR) can take a fine radar image without relation to sunshine condition, so it is important to propose the display method that fulfills a users demand. SAR provides some information with high-level process. To confirm both SAR image and the results of the high-level process simultaneously, the color display is effective. However, conventional method has the restriction of color combination. In this context, we proposed the display method focusing the saturation. The proposed method superimposed the phase map of along track interferometry, which is one of the high-level processes, on SAR image with good visibility. In this paper, we discuss the effect of the proposed display method, explain its formularization, and demonstrate the effect by airborne SAR data.

Sea surface current measurement with Ku-band SAR along-track interferometry

Along track interferometric (ATI) synthetic aperture radar (SAR) has the capability of detecting moving targets and measuring the line-of-sight velocity of the target. With the ATI SAR, the current velocity map can be obtained by combining two perpendicular ATI data sets recorded over sea in rapid succession. In this paper, we describe how sea surface current can be mapped using airborne Ku-band SAR and present results of sea surface current at Cape Irago in Japan.

A New Nonlinear Distortion Compensation Scheme for 8PSK/OFDM in Satellite Channel

This paper discusses 8PSK/OFDM transmission in nonlinear satellite channel. We propose an effective compensation scheme for nonlinear distortion with high coding rate. Proposed compensation scheme is composed by bit-interleaved coded modulation with iterative decoding and original compensation for nonlinear distortion. The proposed scheme has lower complexity by combining two feedback systems and achieves good error performance under large nonlinear distortion in satellite channel.