a digital look-up table adaptive predistortion technique using a six-port receiver for power amplifier linearization is presented. the system is designed in ka-band for a dvb-s2 satellite link. we use a six-port receiver at the linearizationloop in place of classic heterodyne receivers. the six-port receiver is implemented by the use of passive microwavecircuits and detector diodes. this approa...

The new Ka-band communications services require highly linear, high power amplifiers (HPAs). Traveling wave tube amplifiers (TWTAs) offer the best millimeter wave HPA performance in terms of power and efficiency, but are inferior to solid state power amplifiers (SSPAs) in linearity. This paper discusses techniques for improving millimeter wave HPA linearity. The significance and methods for eva...

This article presents Eutelsat European Ka-band implementation of the broadband ToowayTM service and its evolution through a dedicated Ka-band exclusive satellite (KA-SAT). It also explains Eutelsat’s choice in selecting the Ka-band for interactive services, broadcast video and IPTV services, demonstrating the optimal consumer service synergy between existing Ku-band and new Ka-band services. K...

The principal instrument of the SWOT mission is KaRIn, a Ka-band interferometric SAR system operating on two near nadir swaths on opposite sides of the satellite track. This article describes the specificities of images from such a SAR system as compared to images acquired by conventional spaceborne SAR systems. Both radiometric and geometric aspects are covered.

Introduction Conclusions References

The paper reviews some of the most relevant problems which are expected in realizing some of the satelllite-based Resource Sharing Systems envisaged in the next future. Important issues like the necessary input information, the dynamic properties the system must possess, the strategies and the needed margins are considered and some preliminary results coming from recent studies presented.

2 for Arsenic 3 Ka-Ming Wai,†,# Shiliang Wu,*,†,‡ Xueling Li,‡ Daniel A. Jaffe, and Kevin D. Perry 4 †Department of Geological and Mining Engineering and Sciences and ‡Department of Civil and Environmental Engineering, 5 Michigan Technological University, Houghton, Michigan, 49931 United States 6 Physical Sciences Division, School of Science, Technology, Engineering, and Mathematics, University...

Relatively few finite non desarguesian flag-transitive affine planes are known whose collineation groups are solvable. With a single exception (see below), all of the known ones of odd order fall into two families studied in [Ka, Su l ] ; those references also contain some historical remarks. The purpose of this note is to construct an additional family of such planes, explain why they are new,...